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Telos Zephyr Xstream, User Manual

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Telos Zephyr Xstream User Manual Download Page 105

 

 

USER’S MANUAL 

 

 

Section 5:   GUIDED TOUR of the MENUS      93

 

5.4

 

The 

Codec

 Menu 

The

 

settings

 

of

 

the

 

codec

 

menu

 

will

 

determine

 

what

 

codecs

 

with

 

which

 

you

 

can

 

communicate,

 

as

 

well

 

as

 

the

 

quality

 

and

 

delay

 

of

 

the

 

coded

 

audio

 

stream.

  

For

 

more

 

on

 

these

 

selections

 

see

 

Section

 

6

 

(Audio

 

Coding

 

Reference)

 

and

 

Section

 

10

 

(Applications

 

Guide).

  

Note

 

that

 

the

 

menus

 

shown

 

here

 

are

 

applicable

 

when

 

the

 

Interface

 

setting

 

in

 

the

 

TEL

 

Menu

 

is

 

set

 

to

 

ISDN

 

or

 

V.35

 

split

.

  

If

 

V.35

 

single

 

or

 

Ethernet

 

is

 

selected

 

for

 

Interface

,

 

the

 

CODEC

 

menus

 

will

 

be

 

slightly

 

different.

  

See

 

Appendix

 

6

 

(Special

 

Operational

 

Modes)

 

for

 

more

 

details.

 

 

 

 

 

CODEC - Screen 1 (Status) 

 

 

 

 

 

 

 

 

 

The

 

first

 

press

 

of

 

the

 

<

CODEC

>

 

button

 

shows

 

a

 

screen

 

with

 

a

 

summary

 

of

 

the

 

codec

 

settings

 

(see

 

below)

 

Summary of Contents for Zephyr Xstream

Page 1: ...Zephyr Xstream Advanced Digital Network Audio Transceiver TheBestWaytoHearfromThere USER S MANUAL Manual Version 3 0 for software version 3 0 and later For 10 Base T and 100 Base T hardware versions...

Page 2: ......

Page 3: ...port telos systems com Via World Wide Web The Telos Web site has a variety of information that may be useful for product selection and support The URL is http www telos systems com Feedback We welcome...

Page 4: ...mational only Telos Systems makes no endorsement of any particular product for any purpose nor claims any responsibility for operation or accuracy Warranty This product is covered by a one year limite...

Page 5: ...Systems has the following test numbers available USA 216 781 9310 216 781 9311 Layer III Dual transmit 32 KHz sample rate USA 216 621 1826 aacPlus mono must call as an Xport call Germany 49 81 61 42...

Page 6: ...shock This symbol wherever it appears alerts you to important operating and maintenance instructions Read the manual TO PREVENT RISKS OF ELECTRIC SHOCK DISCONNECT POWER CORD BEFORE SERVICING USA CLASS...

Page 7: ...ables CANADA WARNING This digital apparatus does not exceed the Class A limits for radio noise emissions set out in the Radio Interference Regulations of the Canadian Department of Communications Le p...

Page 8: ...r Xstream 16 2 3 Xstream vs Xstream MX vs Xstream MXP 16 3 GUIDED TOUR of the HARDWARE 19 3 1 Zephyr Xstream Front Panel Non mixer version 19 3 2 Zephyr Xstream Rear Panel non mixer version 24 3 3 Zep...

Page 9: ...X 21 Interface option 153 9 2 Uses for the X 21 V 35 Interface Option 154 9 3 Hook Ups to Non ISDN Synchronous Networks 157 10 APPLICATIONS GUIDE Hints Ideas 165 10 1 Xstream Versatility types of dia...

Page 10: ...echniques 273 14 SPECIFICATIONS WARRANTY 293 14 1 Specifications 293 14 2 Zephyr Xstream Limited Warranty 296 APPENDICES 297 Appendix 1 Codec Interoperability Information 297 Appendix 2 Finding Public...

Page 11: ...ould read these w IMPORTANT TIP This information is essential to getting the Zephyr Xstream to work or prevent damage to it To avoid headaches read these h HOT TIP This information will probably come...

Page 12: ...the system CURIOSITY NOTE Amaze your friends with your grasp of ISDN and Coding trivia Not necessary for the ability to install and operate the Zephyr Xstream Z ZEPHYR CLASSIC VS XSTREAM COMPARISON Th...

Page 13: ...u can use to impress others If you need to put the unit in service today or have experience with other similar equipment this section will allow you to get started quickly with your Zephyr Xstream Qui...

Page 14: ...ided by the Telco 2 OR Your telephone company Telecom has provided an NT1 This is nearly always the case outside of the USA Canada Cable required A large modular cable with eight wires that fits into...

Page 15: ...Directory Numbers DNs if the telephone numbers are not incorporated into the SPIDs i ISDN TIP European Japanese users should disregard all references to SPIDs Euro ISDN Japanese ISDN do not have SPID...

Page 16: ...tep by Step Connecting the Audio Inputs Outputs Got your audio cables ready Here is where to connect them Send audio is connected to the back panel This is the outbound audio to be heard at the far en...

Page 17: ...elivering identical stereo streams If the stream being received by the codec is dual mono such as G 722 the decoded audio is split between the two LivewireTM sources The first source has the A mono fe...

Page 18: ...l or S T This cable must have eight wires and is provided with the Zephyr Xstream You should not need to provide power to the NT1 The NT1 is normally powered from the ISDN line 1 3 Powering Up Time to...

Page 19: ...settings To reset the Zephyr Xstream to the factory defaults Press the System button located beneath the LCD display 5 times You will see a screen that looks like the following Using the 6 button mov...

Page 20: ...our second B channel using the dial pad on the front right panel as above Then press the SEL button to store it 4 You now have two options If your ISDN does not require Directory Numbers DN press TEL...

Page 21: ...ou should observe the following The SYNC lamp will be glowing green near the top of your Zephyr Xstream s front panel above the Send meter If you are using the Zephyr Xstream s internal NT1 i e are a...

Page 22: ...using Zephyr Xstream s internal NT1 the green status LED near the jack on the rear panel should be on solid If it is not you have a very basic line problem see Section 13 Deep Tech Troubleshooting for...

Page 23: ...s Located less than a mile from the Rock n Roll Hall of Fame there is always something interesting playing on the Telos ISDN test line Let s call Cleveland If you prefer you can call our test line in...

Page 24: ...he long distance access code followed by the Telos test line number See Section 13 for additional tips Let us say you don t need a prefix and most people don t and you want to use MCI Dial Line 1 1010...

Page 25: ...Section 10 Applications Guide How do I call a Zephyr Xport on a POTS line Section 4 2 Section 10 1 How should the Zephyr Xstream be configured when the far end is not a Zephyr Xstream Section 10 Appli...

Page 26: ...USER S MANUAL Section 1 QUICK RESULTS 14...

Page 27: ...rt can connect to POTS lines and call your ISDN Xstream at the station An ISDN option permits connectivity with AAC and G 722 over ISDN A software upgrade in 2006 adds enhancements to IP such as bi di...

Page 28: ...digital transmission in the majority of cases vs the POTS to POTS connection used by other manufacturer s equipment For more on the various types of connections possible with your Xstream see Section...

Page 29: ...for AGC Limiting Selectable phantom power feeds inputs 1 2 Two local mixes allow any combination of send and receive audio for local headphone monitoring or a Public Address feed Local Mix one appear...

Page 30: ...USER S MANUAL Section 2 INTRODUCTION Getting to Know the Zephyr Xstream 18...

Page 31: ...her models Therefore we will cover the hardware of the Xstream in Sections 3 1 front and 3 2 rear and the Xstream MX MXP in Sections 3 3 front and 3 4 rear 3 1 Zephyr Xstream Front Panel Non mixer ver...

Page 32: ...ight to be solidly on then start blinking again as the clock readjusts Lock 1 2 LEDs The green Lock 1 and Lock 2 LEDs represent the codec decoder status These will illuminate when a valid bitstream is...

Page 33: ...options The idea is to make it easy to jump directly to a desired menu simply by pressing the desired Menu key a specific number of times Pressing and holding down any of these keys will take you back...

Page 34: ...t again See the character C press it again See the character a press it again See the character b press it again See the character c press it again See the numeral 2 press it yet again the cycle start...

Page 35: ...tering the number to be dialed While we like consistency this field is used so often it made sense to make it easier by doing this It also makes operation more similar to the Zephyr classic The DROP k...

Page 36: ...USER S MANUAL Section 3 GUIDED TOUR of the HARDWARE 24 3 2 Zephyr Xstream Rear Panel non mixer version...

Page 37: ...ith the following pin out PIN FUNCTION 1 No Connection 2 No Connection 3 Line R 4 Line T 5 No Connection 6 No Connection Top ISDN U interface connector Note the polarity of the line connections should...

Page 38: ...d is supplied for use outside of North America where the NT1 will be provided by the Telco It can also be used for special applications where the Zephyr Xstream s built in NT1 is shared between it and...

Page 39: ...Option Offers interface to digital synchronous serial bit streams primarily for non ISDN applications Both V 35 and X 21 equipment can be accommodated with the use of the appropriate cable More inform...

Page 40: ...e present i e permanently asserted on motherboard versions G and later Using a 9 pin female D Sub connector this is an RS 232 serial port using the standard 9 pin format configured as if it were a mod...

Page 41: ...uest to Send RTS 4 Not used 5 Clear to Send CTS 3 8 6 Data Set Ready DSR 3 6 7 Signal Ground SG 5 8 Data Carrier Detect DCD 3 1 20 Data Terminal Ready DTR 4 Not used 22 Ring Indicator RI 3 Not present...

Page 42: ...indicator may only illuminate occasionally flickering of this light is normal w IMPORTANT Xstreams manufactured prior to 3rd quarter 2006 have a 10 Base T connector instead of a 100Base T connector Yo...

Page 43: ...RISON The original Zephyr has only four inputs and outputs numbered 0 3 while the Xstream has 8 inputs 0 7 The four inputs and outputs of the Zephyr will communicate with the first four inputs and out...

Page 44: ...t equipment s inputs An appropriate value is in the range if 2 2K to 10K Operation with logic inputs requiring a voltage less than 5 volts is not possible If used with a relay or LED then tie your ext...

Page 45: ...rallel logic input circuit t DEEP TECH NOTE The Zephyr Xstream s universal logic input circuit motherboard rev G and later can be used with switch or relay closures voltage levels up to 24 Vdc or logi...

Page 46: ...ter if input signal exceed these values The inputs are designed to be sourced from balanced line level signals Older equipment with a transformer output stage may need a terminating resistor usually 6...

Page 47: ...CURIOSITY NOTE The Telos Zephyr Xstream uses the more common pin outs for three pin XLR inputs outputs You can easily remember the correct signals when wiring connectors using the phrase George Washin...

Page 48: ...ync signal presented at the Sync In connector This selection is made in the AUDIO menu See Section 11 Detailed Menu Reference for details on this menu option t DEEP TECH NOTE The Sample Rate conversio...

Page 49: ...offer some degree of protection It is the user s responsibility to ensure protection adequate for their conditions is provided Section 4 Installation Basic Operation has additional information e WARNI...

Page 50: ...information Repeated presses allow paging through the menu options Navigation Menu Selection Keys Numeric Keypad Used to enter numerical text information Used for dialing Generates DTMF tones for navi...

Page 51: ...set up the Send Receive and Left Right balance for local monitor mix 2 Main Mixer Controls These for knobs control the Zephyr Xstream MX MXP s input levels for the main mixer section A button adjacent...

Page 52: ...2 can be enabled from the eighth AUDIO menu Main Mixer Input Assign Clip LEDs For each input on the Main Mixer there are two LEDs These indicate whether that input is assigned to the A left or B righ...

Page 53: ...nd bargraph LEDs represent the level of audio into the coder section This level is affected by several factors The output level of the device connected to the Zephyr Xstream the setting of the Ch x Ga...

Page 54: ...ough the menu options on a given page of menu items Once the desired menu item has been highlighted displayed with white text on a black background pressing the SEL selects this option You can then us...

Page 55: ...ction 4 2 Basic Installation Operation AUTO The AUTO key allows access to Zephyr Xstream s 100 stored Dial Setups 00 to 99 These can be accessed by pressing AUTO entering two digits and then pressing...

Page 56: ...USER S MANUAL Section 3 GUIDED TOUR of the HARDWARE 44 3 4 Zephyr Xstream MX MXP Rear Panel Mixer versions...

Page 57: ...jack with the following pin out PIN FUNCTION 1 No Connection 2 No Connection 3 Line R 4 Line T 5 No Connection 6 No Connection Top ISDN U interface connector Note the polarity of the line connections...

Page 58: ...is supplied for use outside of North America where the NT1 will be provided by the Telco It can also be used for special applications where the Zephyr Xstream s built in NT1 is shared between it and...

Page 59: ...nd Control Ports RS 232 DCE Using a female 9 pin D sub connector this is an RS 232 serial port using the standard modem style format The default line protocol is 8 bits 1 Stop Bit No Parity with no fl...

Page 60: ...control the system and can access a number of special diagnostic modes as described in Section 12 System Functions Remote Control It is also possible to connect to the Zephyr Xstream s command line u...

Page 61: ...Request to Send RTS 4 Not used 5 Clear to Send CTS 3 8 6 Data Set Ready DSR 3 6 7 Signal Ground SG 8 Data Carrier Detect DCD 3 1 20 Data Terminal Ready DTR 4 Not used 22 Ring Indicator RI 3 Not presen...

Page 62: ...icator may only illuminate occasionally flickering of this light is normal w IMPORTANT Early rev Xstreams have a 10 Base T connector instead of a 100Base T connector You can identify if your unit supp...

Page 63: ...he Xstream has 8 inputs 0 7 The four inputs and outputs of the Zephyr will communicate with the first four inputs and outputs of the Xstream i e 0 3 PIN FUNCTION 1 5 Volts DC 400 mA max 2 Output 0 3 O...

Page 64: ...at equipment s inputs An appropriate value is in the range if 2 2K to 10K Operation with logic inputs requiring a voltage less than 5 volts is not possible If used with a relay or LED then tie your ex...

Page 65: ...ced See below for a simplified schematic of the input circuitry 5 VDC 30 Volts max INPUT PIN 25 Parallel logic input circuit t DEEP TECH NOTE The Zephyr Xstream s universal logic input circuit can be...

Page 66: ...nge is adjustable of course and is also affected by the built in AGC Limiter selected in the Ch x Proc menu selection on the second through the fifth AUDIO menus The values given above are the nominal...

Page 67: ...these inputs should normally be a mix minus or those monitoring from the far end will hear a delayed version of their own audio coming back to them i e an echo See section 10 3 for details on dealing...

Page 68: ...00008 006 or later the unit can be configured to be fed from Local Monitor Mix 1 These are XLR male sockets with the following pin outs PIN FUNCTION 1 Ground 2 Audio 3 Audio The analog audio outputs h...

Page 69: ...Installation has additional information e WARNING This equipment is designed to be operated from a power source that includes a third grounding connection in addition to the power leads Do not defeat...

Page 70: ...USER S MANUAL Section 3 GUIDED TOUR of the HARDWARE 58...

Page 71: ...tp www softwareauthority com zephyrremote htm for additional information Environmental Considerations Heating Ventilating Cooling Requirements For optimal reliability it is necessary to avoid exceedin...

Page 72: ...ion defeating this safety ground will prevent the internal line noise filter from functioning w IMPORTANT SAFETY INFORMATION If fuse replacement is required please note For continued protection agains...

Page 73: ...ble Search surge ISDN for numerous sources 4 2 Introduction to Zephyr Xstream s Menu System The Zephyr Xstream has seven menus The four primary menus are AUDIO CODEC TEL and SYSTEM Repeated presses of...

Page 74: ...you must select it by pressing the SEL button The selected item will move to the top of the screen and detailed information about that menu selection will be shown below it In the case of most menu i...

Page 75: ...the menu item bitrate is highlighted i e is shown with white text on a black background as shown below 3 Press the SEL button once Note that the menu item moves to the top of the screen and informati...

Page 76: ...ber using the Zephyr Xstream s keypad w IMPORTANT TIP You can press the TEL button at any time to escape without saving the changes you have made IF THIS UNIT HAS ALREADY BEEN PROGRAMMED YOU SHOULD PR...

Page 77: ...cters appear on the and keys For example Press the number 2 once See the character A press it again See the character B press it again See the character C press it again See the character a press it a...

Page 78: ...the following If you wish to dial a data call to another ISDN codec Mode Zephyr you can simply enter the desired number and press DIAL again A second call can be placed on Line 2 by pressing DIAL a th...

Page 79: ...le modes are Zephyr Places a data mode call at the rate indicated in the CODEC menu Phone Places a voice mode call according to the G 711 standard This allows placing a call to any standard telephone...

Page 80: ...ased on the Dial Setup used h HOT TIP If you are using one of the Xstream s V 35 interface modes see Section 9 you can use Dial Setups without phone numbers to conveniently changes modes If a setup co...

Page 81: ...h ETS 300 ISDN it is acceptable if Deactivated Deactivated is displayed If necessary activate the appropriate Location Setup for the location if you have just arrived there now see below Or you may ne...

Page 82: ...he need for manual configuration 2 Optional If you wish to include CODEC settings in your Dial Setup you may wish to dial the location in question now to verify that your codec settings are correct If...

Page 83: ...tings or not by selecting this menu selection The choices are Number no codec information included with this dial setup or Number Codec If Number Codec is selected the system will include the current...

Page 84: ...s Or Use the Keypad to enter the 2 digit number 00 to 99 for the desired setup That setup will be displayed and will be highlighted 3 Once the desired setup is highlighted press the SEL button The nam...

Page 85: ...This is a snapshot of all settings of the AUDIO menu Note the front panel Left Right and Snd Rcv mixer assignments on the Zephyr Xstream MX MXP model s front panel are included along with the settings...

Page 86: ...ings are correct In that case the line status should indicate Ready Ready with ETS 300 ISDN it is acceptable if Deactivated Deactivated is displayed If you are not connected to the line that s ok too...

Page 87: ...as selected Unused Entry will be displayed see below 4 Press SEL to continue to the screen shown below or press 5 and then SEL to escape without changing 5 Enter a name see the beginning of this chapt...

Page 88: ...at the menu selections in the TEL and AUDIO optional menus are set correctly 3 Press the AUTO key Choose the Location Setup to be edited To choose a Location Setup you have two options Press and hold...

Page 89: ...rate and sample rate settings must be matched between the two ends c COMPATIBILITY TIP The AAC and AAC LD standards are new and are not supported by older codecs When communicating with older equipmen...

Page 90: ...tand that the Transmit and Receive settings on two connected units may very well NOT match This is because there are frequently times when it is appropriate to use a different coding mode coming versu...

Page 91: ...then at 56kbps if the higher rate fails h HOT TIP Since the network has to know the bit rate for a given call this information is available to the Xstream on incoming calls Therefore the Xstream will...

Page 92: ...ple rates 32kHz is most commonly supported in MPEG Layer 3 whereas 48kHz is more commonly used in Layer 2 24kHz is sometimes seen in Layer 2 In this case set your Transmit or Receive to L2 Half 24 and...

Page 93: ...ing your favorite web browser Of course you will have to give your Xstream a suitable IP address before you can access it in that manner Where applicable the web pages have been included in this secti...

Page 94: ...MENUS 82 MENUS The CODEC TEL SYSTEM Menus all versions CODEC CODEC CODEC SYSTEM TEL SYSTEM SYSTEM SYSTEM SYSTEM TEL TEL TEL TEL SYSTEM SYSTEM SYSTEM SYSTEM SYSTEM CODEC Compat Zephyr TEL SIP Port 5060...

Page 95: ...UR of the MENUS 83 MENUS The DIAL AUTO Menus all versions AUTO 2 DIGITS AUTO DIAL Phone DIAL DROP F our Times Phone DIAL DROP Four Times MANUAL DIALING ACTIVATING A DIAL SETUP AUTO 3 DIGITS AUTO ACTIV...

Page 96: ...USER S MANUAL Section 5 GUIDED TOUR of the MENUS 84 MENUS The Audio Menu non mixer version AUDIO AUDIO AUDIO Gain Trim Send Mix Discrete...

Page 97: ...USER S MANUAL Section 5 GUIDED TOUR of the MENUS 85 MENUS The Audio Menu MX MXP mixer versions AUDIO 1 4 Times AUDIO AUDIO 1 2 Times AUDIO AUDIO Assignment Unlocked...

Page 98: ...tatus At the bottom in inverse test is the status of each ISDN line or V 35 port w IMPORTANT TIP You can defeat the timeout function that causes the default screen to appear if you wish You may want t...

Page 99: ...log and AES EBU send level AUDIO Screen 2 Pressing the AUDO Button a third time will show this screen with the following options Input Source This allows selection of either the Analog AES EBU or Live...

Page 100: ...this setting are MIC 44 55 dBu nom MIC 30 40 dBu nom Line Con 10 dBu nom Line Pro 4 dBu nom The nominal values given above assume the fader is mid position and the AGC Limiter processor is off Ch x Pa...

Page 101: ...e High This is an aggressive setting employing both AGC and limiting This setting is perfect for easily excited talent such as sportscasters Do not use this setting for music Music This setting offers...

Page 102: ...Mix Particularly useful when the both a mix minus and a producer IFB interruptible foldback are being recieved as it allows both feeds to be heard in both ears Mon x Rcv Pan Whenever Rcv is selected u...

Page 103: ...t of the audio fed to the A Left and B Right channels of the Local Mix AUDIO Menu 8 This menu has three options Phantom This option allows you to disable Off or enable On phantom power for inputs 1 2...

Page 104: ...ordetailsonconfigurationofLivewire ThesemenusenableyoutospecifytheLivewirestreamsbeingcreatedbythecodec sources delivered totheLivewirenetwork andtheaudiostreamsbeingdeliveredbythecodec destinations f...

Page 105: ...tion 6 Audio Coding Reference and Section 10 Applications Guide Note that the menus shown here are applicable when the Interface setting in the TEL Menu is set to ISDN or V 35 split If V 35 single or...

Page 106: ...parameters also affect the quality and delay of the audio transmitted Transmit This determines the format of the audio locally coded for transmission In order for the far end to receive this audio the...

Page 107: ...being sent from the far end and internally set the Receive mode to match As the auto mode takes several seconds to determine the correct mode generally we recommend that you use a specific setting for...

Page 108: ...G codecs is not possible Bit Rate This setting determines the per channel bit rated used for digital audio transmission This setting sets up the codec section as well as telling the ISDN interface wha...

Page 109: ...rd codec the unit will accept the call but will not change rate since that would cause a loss of audio to from the original site There will be no lock or audio from the site associated with the second...

Page 110: ...sed Z ZEPHYR CLASSIC VS XSTREAM COMPARISON Note Not all Zephyrs support MPEG Layer 2 Very early units support MPEG Layer 3 and G 722 only The Zephyr and Zephyr Express do not support MPEG Layer 2 at t...

Page 111: ...alized with the Telco and is able to make and receive calls The line is idle i ISDN TIP A false ready may be displayed if your Telco setting is incorrect see below or if SPIDs are not entered when req...

Page 112: ...ered about your ISDN circuit in order for it to properly function If your ISDN BRI circuit protocol is ETS 300 Euro ISDN INS 64 Japanese ISDN or AT T Cust PTP you can leave all of these blank SPID 1 S...

Page 113: ...information see Section 11 Detailed Menu Reference h HOT TIP The Directory Numbers or DNs sometimes called Listed Directory Numbers or LDNs are your 7 digit phone number as would be found in the Telep...

Page 114: ...your protocol In Section 11 Detailed Menu Reference we ve included numerous tips in how to guess your Telco setting for users in the USA Canada Z ZEPHYR CLASSIC VS XSTREAM COMPARISON The Zephyr class...

Page 115: ...l be appended to the beginning of any number entered when dialing either manually or by using Dial Setups The most common use of this is when your ISDN circuit requires that a 9 8 or other digit be us...

Page 116: ...N redials or disables the feature If an outgoing call is active when the Xstream loses ISDN connectivity or power it will attempt to re establish the call as soon as the error state is cleared that is...

Page 117: ...need to help you Should you need to call us have this information ready Uptime This is the length of time since the last reboot power cycle or warm boot This can be helpful when troubleshooting interm...

Page 118: ...y set the bit rate of the Zephyr Xstream s RS 232 port on the rear panel About This gives you information about your Xstream SYSTEM Screen 3 Pressing the SYSTEM button a third time shows this screen w...

Page 119: ...rience problems that seem to be solved by rebooting be sure to contact Telos with all relevant details so we can assist you in determining the cause SYSTEM Screen 5 The fifth SYSTEM menu screen has se...

Page 120: ...eally wish to erase all your settings Press the SEL button or any of the MENU buttons if you wish to abort If you choose to proceed with erasing your settings select OK by pressing 6 or 5 to select OK...

Page 121: ...ereo You can reduce the data requirements by lowering the quality somewhat 13 bits would yield a respectable 78 dB dynamic range certainly adequate for casual home listening And a 32kHz sample rate wi...

Page 122: ...ost or altered It might seem that lossless redundancy reducing methods such as PKZIP Stuffit Stacker and others used for computer hard disk compression would be applicable to audio Unfortunately no co...

Page 123: ...below the threshold To benefit from the masking effects perceptual coders use a filter bank to divide the input audio into multiple bands for analysis and processing The maximum masked noise level is...

Page 124: ...coded should not be processed with any non linear dynamics processing such as clipping multi band compression or hard limiting Wideband compression or AGC is acceptable and may be desirable if a consi...

Page 125: ...effectively means managing several tradeoffs Most important is the number of samples coded together in one frame Long frames have high delay but are more efficient because the header and side informat...

Page 126: ...tant test series conducted at the BBC in England the CBC in Canada and NHK in Japan Finally results are tabulated a report is drafted and ultimately a standard is issued In 1992 under MPEG1 the first...

Page 127: ...om different developers taking the best pieces from each AAC was built on a similar structure to Layer 3 and thus retains most of its features Nevertheless compared to the previous MPEG layers AAC ben...

Page 128: ...parts in a piece of music that cannot be encoded at a given data rate without audible noise These sequences require a higher data rate to avoid artifacts On the other hand some signals are easy to co...

Page 129: ...method available in Zephyr Xstream and we particularly like it because it is perfectly matched to the bitrates available on ISDN BRI lines It offers 20 kHz mono or stereo audio bandwidth Significantly...

Page 130: ...into the studio microphone When there is no echo it has been discovered that anything less than 100 ms one way delay permits normal interaction between participants Between 100 and 250 ms is consider...

Page 131: ...quality scales up with bit rate and transparent quality can be achieved AAC LD s coding power is roughly the same as Layer 3 meaning that mono high fidelity 15 kHz audio may be sent via one ISDN chan...

Page 132: ...re shown below AAC LD is clearly better than Layer 3 for half of the test items and as good for the remaining half Not bad considering that AAC LD has a fraction of the delay Performance comparison of...

Page 133: ...it is a lossless reduction scheme Notice that this redundancy reduction process is the ideal supplement to psychoacoustic masking In general maskers with high tonality have more redundancy but allow l...

Page 134: ...using it were available earlier than Layer 3 It s a preferred choice for applications where very large data capacity is available such as satellite links high capacity Primary ISDN or T1 circuits and...

Page 135: ...in the adaptive function is designed only for speech This is why music transmitted via G 722 has a distinct fuzzy quality G 722 has a frequency response extending to 7 5 kHz with fairly poor fidelity...

Page 136: ...reo bitrates with good results Informal tests at the Telos lab with two passes of Zephyr Layer 3 have proven successful with listeners noticing no audible degradation even on difficult CDs Tests with...

Page 137: ...ses one or two this is good as the ear has masking in the time domain as well as the frequency domain and Layer 3 naturally exploits this additional dimension The down side is that when many stages of...

Page 138: ...mporal noise shaping Backwards adaptive Linear prediction Perceptual Huffman Perceptual ADPCM Audio Freq Response 0 1 dB Mono 56 or 64kbps Discrete Stereo 112 or 128kbps Sample Rate 16 kHz 7 5 kHz 24k...

Page 139: ...delay is not included Frequency response is for swept sine test response with program material will vary owing to the dynamic nature of the coding process As you can see from above the Zephyr Xstream...

Page 140: ...essity Section 10 3 Applications Guide Choosing a Receive mode has more information on this topic t DEEP TECH NOTE The longer delay in the STEREO modes results from the splitting process required to t...

Page 141: ...that support fully independent operation Z ZEPHYR CLASSIC VS XSTREAM COMPARISON While the Zephyr Classic supports Dual transmission in Layer 3 as well as G 722 it can only independently receive in G 7...

Page 142: ...andwidth However the 32 kHz rate is generally preferred for broadcast applications because no bits are wasted on frequencies above 15 kHz which are not transmitted in analog broadcast services anyway...

Page 143: ...riety of vendors that support this mode In Layer 3 Zephyr set the standard Other codecs that support Layer 3 use the FhG Telos protocol developed for Zephyr classic Buchta splitting Telos has long bee...

Page 144: ...USER S MANUAL Section 6 AUDIO CODING REFERENCE 132...

Page 145: ...ignaling Since the digital technology was deployed as isolated links later over microwave or coax cable within an otherwise analog network channel banks at the boundaries of each digital interface per...

Page 146: ...ng channel for call set up and status communication This is Basic Rate Interface BRI 2B D service In Europe and other countries it is also referred to as ISDN 2 or S It can be implemented over most of...

Page 147: ...n among Telco personnel While the SPID generally includes the corresponding phone number this is not necessarily the case For numerous additional tips on SPIDs see Section 11 Detailed menu Reference i...

Page 148: ...one company see Appendix 4 Known Working SPIDs by Telephone Company Directory Numbers DNs and Multiple Subscriber Numbers MSNs Directory Numbers Directory Numbers or DNs for short are the 7 digit tele...

Page 149: ...basis by prefixing the number with the 1010XXX carrier selection code You must dial the full number including the 1 or 011 country code following the prefix Some long distance connections are limited...

Page 150: ...ine these days and problems are really quite rare The following information is intended to help if you run into difficulties The first order of business is to find someone who knows what ISDN is While...

Page 151: ...course you would not be able to transmit hi fidelity codec data since both channels would be in use Calls from a Zephyr Xport that is connected to an analog POTS line also use CSV Therefore you will...

Page 152: ...AT T Lucent 5ESS Northern Telecom Nortel DMS 100 or Siemens EWSD switches Each of these can support the National ISDN 1 NI 1 protocol standard which has been specified by Bellcore the technical lab th...

Page 153: ...DMS 100 Custom Functional DMS Cust SPIDs required Directory Numbers required NORTEL DMS 100 National ISDN 1 National ISDN 2 Natl I 1 SPIDs required Directory Numbers required Siemens EWSD USA Nationa...

Page 154: ...ffice configuration Be sure to determine in advance which service will be provided Of course two Switched 56 circuits can be ordered if transmission of stereo is desired In most areas switched 56 and...

Page 155: ...ont panel menu of the Xstream In the Audio menu Input Source selection you will find these three options You would normally use Livewire at your studio and analog at the remote site In addition to aud...

Page 156: ...Backfeeds to a codec in the LivewireTM world are always stereo streams By default the right channel of the backfeed is a L R mono sum of the configured program source usually PGM1 The left channel is...

Page 157: ...In the example above we have chosen a simple name of ZXS II Network address IP Address This is the IP address of the Xstream codec As you might expect each Livewire device must have a unique IP addre...

Page 158: ...re update download to be completed and checked without danger of making the unit inoperable if the download were to be incomplete or corrupted It also provides an easy way to try a new software versio...

Page 159: ...often powered down or relocated the recommended clock priority setting for an Xstream is 0 always slave Here is a bit of background on this topic Livewire s clocking system is automatic and largely t...

Page 160: ...is used 7 Always Master STL Snake This setting forces a particular node to be clock master Use only when two nodes are connected back to back without an Ethernet Switch w IMPORTANT Only a single node...

Page 161: ...uses the native VLAN assigned to the port of the switch DSCP Class of Service is a standard describing the tagging of IP frames with service information Network equipment can be set up to provide dif...

Page 162: ...s a backfeed For example maybe you want to use an AUX bus to create your own custom mix In this case you would use Expert Mode to create the setup Use the destination drop down boxes to select the Liv...

Page 163: ...l parallel port and Livewire GPO is sent to both the back panel and Livewire and is triggered by the events specified on the System menu GPI input mode must be specified as either Livewire or rear pan...

Page 164: ...USER S MANUAL Section 8 LIVEWIRETM IP Audio 152...

Page 165: ...r 14 screws using a Phillips screwdriver 6 screws top these will be 1 16th inch Allen head screws on model MXP 6 or 4 screws on each side Lift cover straight off the unit NOTE Screws on the top surfac...

Page 166: ...n the TEL menu to V 35 Split or V 35 Single as appropriate for your application 9 2 Uses for the X 21 V 35 Interface Option SWITCHED 56 Switched 56 is a transition technology which is being offered pr...

Page 167: ...ked within the Central Office switches so that subscribers of both services can connect to each other at a 56kbps rate of course Therefore the far end unit may be on ISDN or Switched 56 If two Switche...

Page 168: ...ted digital service Technically DDS service includes rates up to 56kbps Two such lines can be used to provide stereo audio However dedicated digital lines are also available at higher rates such as 64...

Page 169: ...p bits slowing and chopping the bit flow And just as with audio balanced transmission is more reliable in a noisy environment or in one which has ground potentials at differing levels V 35 is a standa...

Page 170: ...connector Fortunately it is possible to design an interface that accepts both V 35 and X 21 signals This we have done with the Zephyr Xstream allowing connection to both types just by changing the int...

Page 171: ...always combined and are variously referred to as CSUs DSUs CSU DSUs and DSU CSUs We prefer CSU DSU and will use that term Note that the Telos web site www telos systems com includes a glossary if you...

Page 172: ...while a single physical plug has two electrical ports of which one or both may be used The plugs at the other end are labeled PORT 1 and PORT 2 and are connected to the TA CSU as follows One Port Oper...

Page 173: ...rate for each path or may be a single unit with two data ports In Stereo and J stereo the system automatically sorts out which channel is which and therefore it is irrelevant which plug goes to which...

Page 174: ...for mono128 or Stereo operation using both V 35 X 21 ports The Interface selection in the TEL menu should be set to V 35 Split Control Leads There are a number of control leads defined in the V 35 an...

Page 175: ...it rate usually 56kbps If necessary you may disable any handshaking signals by setting them to forced or ignored since handshaking is not required with synchronous data Anti streaming or scrambling op...

Page 176: ...th T1 or E1 will have a menu that determines which channel s should be brought out or aggregated and brought out to each V 35 port This will need to be set on each end If you are using a fractiona1 T1...

Page 177: ...YPE CODEC OF CONNECTIONS POSSIBLE NOTES ZEPHYR Most ISDN Codecs Circuit Switched Data CSD Various as selected 2 using L3 Dual or G 722 Maybe be mixed with a Phone mode call XPORT Zephyr Xport on POTS...

Page 178: ...the CODEC menu ISDN is used end to end for the best quality and lowest delay When using MONO modes the channel A inputs and Line 1 are used The dialing MODE for this call is Zephyr Mono Telephone Netw...

Page 179: ...e A inputs and outputs and Line 1 The central codec will use the A inputs and outputs to communicate with the remote site connected to Line 1 and the B inputs and outputs to communicate with the remot...

Page 180: ...ed end to end for the best quality and lowest delay In Mono 128 modes the channel A input is used The dialing MODE for these calls is Zephyr Telephone Network Mono Stereo Stereo 2 X Mono ISDN 1 Call I...

Page 181: ...mmunicate with POTS lines This arrangement means that the connection is mostly digital with only the POTS line analog thereby giving better performance The dialing MODE for this call is Xport No other...

Page 182: ...frequency response AAC AAC offers Layer 2 quality at 50 of the bit rate The fidelity of stereo at 128kbps meets the ITU International Telecommunications Union criteria for Indistinguishable Quality fo...

Page 183: ...ord to use one B channel or have a single Switched 56 line then this mode offers you better fidelity than any other unless the far end supports MPEG AAC see above L3 Mono 128 Offers 22kHz mono when us...

Page 184: ...ations Guide Voice over applications on a single B channel 1 call Good Use L3 Dual Mono Transmit Far end would use L3 Mono Zephyr or L3 Dual Mono Zephyr Xstream Receive Use 32kHz sample rate for best...

Page 185: ...e 32 kHz sample rate for best fidelity or 48kHz sample rate for reduced delay5 Better Field unit AAC LD Mono 64 Transmit and G 722 Receive Studio unit G 722 Transmit and AAC LD Receive This option has...

Page 186: ...tereo 64 Transmit and G 722 Receive Studio Unit G 722 Transmit and AAC 64 Receive Use 32 kHz sample rate When best stereo is needed in both directions Field Unit AAC J Stereo 64 Transmit and AAC 64 Re...

Page 187: ...rate for best fidelity or 48 KHz sample rate for reduced delay5 Better Field Unit Use AAC LD J Stereo Transmit and G 722 Receive Studio Unit Use G 722 Transmit and AAC Receive Use 32 kHz sample rate f...

Page 188: ...eive one channel from each of two remote Zephyrs Each remote unit would be set to L3 Dual Mono Transmit If Xstream A is dialed from Line 1 to Xstream C s Line 1 then Xstream A s channel A audio would...

Page 189: ...ar end will vary Therefore we will break this section into sub sections depending on the far end codec c COMPATIBILITY TIP When two channels are required for transmission i e for Stereo J Stereo and M...

Page 190: ...In the Dual Mono case the A audio source is sent over Line 1 while the B audio source is sent over Line 2 J Stereo This is Joint Stereo and is the preferred stereo mode in most cases The biggest exce...

Page 191: ...AAC Stereo AAC AAC Mono 128 AAC AAC Mono 64 AAC 64 G 722 G 722 L2 Stereo L2 L2 J Stereo L2 L2 Mono 64 L2 64 L2 Mono 128 L2 L2 Half 64 L2 64 L3 Stereo L3 L3 J Stereo L3 L3 Dual Mono L3 Dual Mono L3 Mo...

Page 192: ...match Actual Sample Rate will be 16 kHz regardless of setting Actual Sample Rate will be 24 kHz regardless of setting Name will depend on software version ZephyrExpress at far end Transmit Mode at Far...

Page 193: ...Xport Transmit AAC LD Mono 64 Receive AAC LD Mono 64 Sample Rate 48 kHz Connect on one B channel only When Xport is on POTS use the Xport Dial Mode selection on the dialing Xstream or Xport No config...

Page 194: ...64 kbps 2 30 LYR3IND56 QS L3 Dual Mono L3 Dual Mono 48 kHz 56 kbps 31 LYR3IND64 QS L3 Dual Mono L3 Dual Mono 48 kHz 64 kbps 32 LYR3IND56 32 QS L3 Dual Mono L3 Dual Mono 32 kHz 56 kbps 33 LYR3IND64 32...

Page 195: ...L2 L2 Mono 128 48 kHz 64 kbps 2 23 L3 56 32YES QS L3 Dual Mono L3 Dual Mono 32 kHz 56 kbps 25 L3 56 48YES QS L3 Dual Mono L3 Dual Mono 48 kHz 56 kbps 29 L3 64 32YES QS L3 Dual Mono L3 Dual Mono 32 kHz...

Page 196: ...not hear himself via the studio cue return Rather his microphone is mixed locally with a studio feed that has everything but the remote audio thus the mix minus designation The announcer gets in his...

Page 197: ...d be a problem since the talent needs to hear the phone pre delay The talent hears callers via the return path As before this return is fed with mix minus a mix of everything on the program bus minus...

Page 198: ...se time of the talent to callers comments will be the sum of studio to remote delay remote to studio delay talent s thinking time For this reason the studio to remote path will generally use the G 722...

Page 199: ...using your favorite web browser Note that you will need to have Java installed to view certain items such as the Livewire audio meters The Xstream s web pages are also included in this section for ref...

Page 200: ...Reference 188 MENUS The CODEC TEL SYSTEM Menus all models CODEC CODEC CODEC SYSTEM TEL SYSTEM SYSTEM SYSTEM SYSTEM TEL TEL TEL TEL SYSTEM SYSTEM SYSTEM SYSTEM SYSTEM CODEC Compat Zephyr TEL SIP Port...

Page 201: ...ailed Menu Reference 189 MENUS The DIAL AUTO Menus all models AUTO 2 DIGITS AUTO DIAL Phone DIAL DROP F our Times Phone DIAL DROP Four Times MANUAL DIALING ACTIVATING A DIAL SETUP AUTO 3 DIGITS AUTO A...

Page 202: ...USER S MANUAL Section 11 THE WORKS Detailed Menu Reference 190 MENUS The Audio Menu non mixer model AUDIO AUDIO AUDIO Gain Trim Send Mix Discrete...

Page 203: ...USER S MANUAL Section 11 THE WORKS Detailed Menu Reference 191 MENUS The Audio Menu MX MXP mixer versions AUDIO 1 4 Times AUDIO AUDIO 1 2 Times AUDIO AUDIO Assignment Unlocked...

Page 204: ...cated situation See Section 5 2 Guided Tour of the Menus for more on Setups The Audio menu has items related to audio input and output analog AES EBU and Livewire h HOT TIP We ve broken each of the me...

Page 205: ...changing to values greater than the default 0 dB will decrease operating headroom by a corresponding amount w IMPORTANT TIP Setting the gain trim adjustment below to values greater than 0 dB will serv...

Page 206: ...s the sample rate of the AES EBU Output signal as follows Codec This option uses the sample rate selected in the Codec menu This is the transmission sample rate and is derived from the ISDN or V 35 cl...

Page 207: ...nd AES Sync capabilities allow you to prevent problems with clock slip due to different clock rates within a digital facility Typically a house clock reference would be fed to the SYNC IN jack of the...

Page 208: ...ation Livewire BasicSetup The basic setup gives you the option of specifying a channel number and name for each the two stereo Livewire streams that can be created by the Xstream The channel numbers m...

Page 209: ...s AUDIO Screen 1 Status The first AUDIO menu has the individual levels for each of the Main Mixer inputs These levels are post fader and therefore can be used to view relative levels of each input Cli...

Page 210: ...looking at the small bar graphs and gate indicator to the right side of this screen The built in Omnia processor is quite sophisticated and offers the following options None This disables the input pr...

Page 211: ...uency 80 Hz Slope 3 dB per octave AUDIO Screens 6 7 These screens are used to set up Local Monitor Mix 1 screen 6 and Local Monitor Mix 2 screen 7 The following options allow the operator to customize...

Page 212: ...ming A B audio channels and routes this to both sides of the Local Mix This can be particularly useful when the both a mix minus and a producer IFB interruptible foldback are being received as it allo...

Page 213: ...he audio fed to the A Left and B Right channels of the Local Mix AUDIO Menu 8 This menu has three options Phantom This option allows you to disable Off or enable On phantom power for inputs 1 2 Phanto...

Page 214: ...eds the codec This can be considered the usual mode of operation for a MX P Xstream Livewire When this setting is selected the mixer is disabled and the codecs input is fed from the Livewire channel s...

Page 215: ...e algorithm for sending stereo audio over 2 ISDN B channels Joint i e Joint Stereo should be used for the majority of applications as it eliminates the redundant transmission of the center channel inf...

Page 216: ...28 it can receive audio coded in this way Use the L3 Stereo Rcv mode to do so L3 Dual Mono The L3 Dual Mono mode is a special mode L3 Dual Mono mode generates two L3 Mono encoded streams at 64 or 56 k...

Page 217: ...se alignment between the two channels However the perceptual model used with L3 Stereo does assume that the listener will be hearing both channels simultaneously i e that this is a stereo application...

Page 218: ...t since they offer significantly lower delay than any mode other than G 722 Offers 14 kHz audio frequency response AAC LD Mono 64 This encodes a single mono bit stream normally using the audio from in...

Page 219: ...channel using the audio from input A Offers 15 kHz audio frequency response when the sample rate is set to 32 kHz and 20 kHz response when the sample rate is set to 48 kHz c COMPATIBILITY TIP When two...

Page 220: ...HOT TIP Of course you will want to use Layer 3 or AAC when supported at the far end We strongly recommend Layer 2 Joint stereo over Layer 2 Stereo when transmitting stereo material in Layer 2 at 128kb...

Page 221: ...mono mode Other than the fact the 24 kHz sample rate is internally and invisibly used its operation is the same as the other Mono 64 modes Offers 8 6 kHz audio frequency response Receive Note that th...

Page 222: ...e should be used All stereo modes require 2 B channels 2 calls unless otherwise stated The correct Receive mode for a Transmit mode with J Stereo in the name will just have the name of the algorithm f...

Page 223: ...o mode takes several seconds to determine the correct mode there are times you may wish to use a specific setting for Receive In this case your receive mode must be set to decode the stream being sent...

Page 224: ...odate the rate selected it is important to drop the call and redial if this parameter is changed during a call w IMPORTANT The Bitrate selection operates differently if the Interface selection in the...

Page 225: ...e where the selections for this menu are different Therefore the Sample Rate menu does not have this option The L2 Half 64 Transmit mode is used to achieve 24kHz operation in MPEG Layer 2 2 The G 722...

Page 226: ...722 only The Zephyr Classic and Zephyr Express do not support MPEG Layer 2 at the 32kHz Sample Rate When communicating with a Zephyr or Zephyr Express in Layer 2 the 48 kHz sample rate should be used...

Page 227: ...NT1 nor the S interface is active This will be displayed if no ISDN line is present It is also displayed on ETS 300 Euro ISDN lines after periods of inactivity the ETS 300 standard allows the central...

Page 228: ...tgoing call in progress Telco switch has acknowledged the call request and is waiting for routing information from the network Outgoing Ring Outgoing call in progress far end has generated a call aler...

Page 229: ...age complete Connect Modem connection is operational Connect Lock Valid MPEG AacPlus data is being received and decoded Renegotiation Request Far end has authorized modem re negotiation Audio will be...

Page 230: ...elephone Company tells you this number when they confirm your order Often it is found written on the line jack or punch block SPID1 corresponds to Line 1 Usually the SPID is the area code phone number...

Page 231: ...ine status your SPID for that channel is incorrect In this case check the SPID For a list of known working SPID formats listed by telephone company see the Appendix Section 13 4 5 Deep Tech Informatio...

Page 232: ...is entered DN will cause problems with incoming calls to that channel Multiple Subscriber numbers ETS 300 and INS 64 only Used only when you are using the ETS 300 Euro ISDN or INS 64 Japanese ISDN for...

Page 233: ...ommonly used switches TELCO SWITCH BRI LINE PROTOCOL CORRECT TELCO SETTING NOTES AT T Lucent 5ESS AT T Custom Point to Point AT T Cust PTP No SPIDs One phone number accesses both channels AT T Lucent...

Page 234: ...gle SPID with the format of 01 7 digit phone 0 try AT T Cust Do not enter this SPID If you were given a single phone number and a single SPID with the format of 01 7 digit phone 00 try Natl I 1 If tha...

Page 235: ...his will also occur when an incoming voice call is answered and can be ignored by the user if an ISDN mode call is subsequently made or received the unit will switch back to ISDN interface automatical...

Page 236: ...on w IMPORTANT The following selections in the CODEC menu will have different options when the Interface is set to V 35 Single Transmit Receive Bit Rate See Appendix 7 Special Operational Modes for ad...

Page 237: ...e you send audio to the remote site but receive nothing in return unless the remote operator manually initiates a connection back to the studio Appendix 6 covers this topic in detail w IMPORTANT The f...

Page 238: ...on both ends of a connection UDP Port Default 9150 RTP streams are sent and received over the UDP port This port is used for both RTP and SIP modes as SIP negotiates the creation of RTP streams The U...

Page 239: ...ower is restored to the Xstream You can adjust the time between these attempts or disable them entirely The redialing feature is also used when attempting to dial via contact closures and v 35 roll ov...

Page 240: ...ation about the system Uptime The times since the system was last powered up or rebooted Loopmode The currently selected loop mode set in the SYSTEM menu see below Version Software version running on...

Page 241: ...0 bps to 57 6 kbps are supported The other serial port parameters are Data Bits 8 bits Parity None Stop Bits 1 Flow control none About This gives you information about your Xstream SYSTEM Screen 3 Pre...

Page 242: ...ted by periods This is a numeric only field enter the numbers using the dial pad Both and will give you a period As usual the 5 key will backspace if you make a mistake or need to delete an old entry...

Page 243: ...s is the IP address of the DNS Domain Name Server you will be using It is an IP address just as with the previous items and is entered in the same way You will need to get this from your network admin...

Page 244: ...n IP address see the rules above or it can be an alphanumeric entry t DEEP TECH NOTE When an alphanumeric entry is present a domain name server DNS is queried for the IP address of the computer using...

Page 245: ...the command line type ping ftp zephyr com enter 3 You should receive a reply If you do not get a reply check with your IT manager for assistance your firewall may not allow FTP access The reply will...

Page 246: ...tely 70 85 of your Xstream s functionality and makes an easy way to audition the various coding algorithms without an ISDN line present If you are connected to another via ISDN or V 35 and that site s...

Page 247: ...your settings Press the SEL button or any of the MENU buttons if you wish to abort If you choose to proceed with erasing your settings select OK by pressing 6 or 5 to select OK Then press SEL to proce...

Page 248: ...xpress do not support Ancillary data in Layer 2 2 In Layer 3 Zephyr Classic can send and receive ancillary data to and from a Zephyr Xstream Inputs 0 3 on the Zephyr correspond to Outputs 0 3 on the X...

Page 249: ...r troubleshooting OFF Forces this output to the false state Input will become high impedance with regards to ground and will float to 5 volts due to the built in pull up resistor This mode is intended...

Page 250: ...te as indicated on the corresponding front panel LEDs Lock B Causes this output to go the true state whenever Lock A is in the on state as indicated on the corresponding front panel LED Lock A Causes...

Page 251: ...een pressed and looks like the following If you wish to dial a data call to another ISDN codec Mode Zephyr you can simply enter the desired number and press DIAL again A second call can be placed on L...

Page 252: ...s modem code into DSP to allow communication with a Zephyr Xport connected to a POTS analog line When call is made in this mode the Interface setting in the TEL menu will change from ISDN to ISDN Mode...

Page 253: ...to Dial Setups used in the classic Zephyr Each of the 100 dial setups consists of several pieces of information See Section 4 Basic Operation and Installation for information on creating and using Set...

Page 254: ...Dial Setups to place calls to an Xport using Xport Mode and a regular telephone using the Phone Mode h HOT TIP You can use dial setups as a way to conveniently change your codec settings Possibly to a...

Page 255: ...change from ISDN to V 35 Therefore your external panic dial trigger source should remain asserted You can manually switch back to V 35 and then drop the ISDN call to restore the V 35 connection Telnet...

Page 256: ...eady for an incoming call Some users have done this with an external timer that automatically closes the contacts a few times a day While the potential drawbacks are obvious this can prevent 48 hour p...

Page 257: ...ct ancillary data information from the coded audio signal and output it on its own serial interface if it is in transparent mode The ancillary data transmission is fully bi directional and does not af...

Page 258: ...in the third TEL menu is set to V 35 Single ancillary data is possible in all permissible transmit modes at 9600 bps How to Control Ancillary Data Transmission Ancillary Data Commands atdt Immediately...

Page 259: ...le via this port including ISDN dialing storage of set ups etc The communication protocol is simple ASCII text so it may be used easily with any computer and terminal emulation software Some are using...

Page 260: ...ich is last Now click on ok You will now see a Phone Number Dialog box Enter the following information Country code Setting does not matter Area Code Setting does not matter Phone Number setting does...

Page 261: ...ter A A Group Zephyr style Description Switch ISDN and phone auto answer on off Name zatdt Parameter auto no E c Group Zephyr style Description Set RS232 to transport mode use or to quit Default off N...

Page 262: ...mono default L3ST Name zsetup Parameter 1 50 name num1 num2 XmtMode RcvMode Rate Compat Group Zephyr style Description Display or define setup Name zspids Parameter line0 7 number Group Zephyr style...

Page 263: ...conversion is applied 48 converts to 48kHz 44 to 44 1kHz 32 to 32 kHz and rcv to the sample rate of the AES EBU receiver Name ancill Parameter Group Misc Description Switch on off ancillary data trans...

Page 264: ...ointers init or read config table r or reset lost lock counter rl c Name decomode Parameter Auto G722 L2M64 L2 L3D M L3 AAC64 AAC AACLDM64 AACLD Group Codec Description Choose decoding algorithm Name...

Page 265: ...the hardware settings Name ipmask Parameter IP mask Group FTP Telnet Description Enter IP mask or display current addresses Decimal format is tried first Name ipgate Parameter gateway IP Group FTP Te...

Page 266: ...se 10 which is allowed to login thru Telnet and has the same rights as a RS232 session Name isdnautoans Parameter off phone ISDN all Group ISDN Description Select ISDN autoanswer mode Name isdni Param...

Page 267: ...sdn il2 il3 iie istk Group Misc Description Switch on a combination of logging channels No parameter will switch off logging w IMPORTANT TIP The most useful logs for troubleshooting ISDN problems are...

Page 268: ...ight M mono left right S stereo Name monipan Parameter monitor1 2 snd rcv 10 10 Group Audio Description Select L R balance for either send or receive audio Name monibalance Parameter monitor1 2 10 10...

Page 269: ...due to access error assert calls TDEASSERTU fatal issues a reset by writing to fatal loop enters an endless loop and lets the watchdog bite Name rs232baud Parameter baudrate 300 57600 Group Misc Descr...

Page 270: ...tream Name dcstart Parameter IP Group Stream Decoder Description Listen to far end encoded stream Name loadweb Parameter host all name Group Http Description Erase loadweb and download all files via F...

Page 271: ...u may be able to enter the following in your browser Telenet 123 345 678 901 enter You will need to login in as described previously Type Login Telos Enter if this does not work use Login Enter NOTE T...

Page 272: ...pment may wish to explore the Zephyr Remote Software package from Software Authority Using it you can control an Xstream via Ethernet or may control multiple Zephyrs and or Xstreams via serial port Se...

Page 273: ...tection adequate for their conditions is provided Section 4 has specific recommendations e WARNING This equipment is designed to be operated from a power source that includes a third grounding connect...

Page 274: ...allservicing to qualified service personnel CAUTION To remove the top cover 1 Remove power from unit 2 Remove top lid screws 14 or 18 screws using a Phillips screwdriver 6 screws top these will be 1...

Page 275: ...Bu nom 3 clip To change the input level operating range 1 Remove the top cover as described above 2 With the front of the Xstream facing you look for the AES EBU socket PC board protruding towards you...

Page 276: ...t Under no circumstances should this power be enabled if the S interface will be shared with a Zephyr Classic or ZephyrExpress To enable PS2 power if present 1 Remove the top cover as described above...

Page 277: ...substantially The early unit request updates from the FTP server specified in the System menu this might be a local machine running a special updater FTP server or it might be a remote FTP server such...

Page 278: ...l reset your browser connection and will need to reconnect Downloading new software A new software version can be downloaded into bank 1 as follows 1 Go to the Telos web site www telos systems com and...

Page 279: ...nario s If your firewall allows FTP through then the Xstream can download the new software directly from the Telos FTP site ftp telos systems com If your firewall does not allow direct FTP download yo...

Page 280: ...See Appendix 5 Modular Cable Guide for details on that cable if needed Standard Ethernet Cables 4 Program the following information into your Zephyr Xstream Ask your network administrator if you need...

Page 281: ...ectly from the Telos FTP site ftp telos systems com If your firewall does not allow direct FTP download see sections I and II above Software update step by step Telos Remote Server It is important tha...

Page 282: ...tem to display a message Some corrupt non volatile values were detected You can disregard this message h HOT TIP If you need to borrow the IP address of a Windows computer to use when updating your Xs...

Page 283: ...re only The system s software is contained within a flash memory SIMM module similar in size and form to those used for PC memory The following directions are for qualified service personnel only If y...

Page 284: ...sh on the green area near either end of the SIMM module The top of the SIMM module should pivot back and the catches on either side should click If this does not happen remove the SIMM module see step...

Page 285: ...e truth In a world where we are surrounded by complexity where we deal daily with equipment and systems only half understood it seems wise to follow understanding by an iterative loop of focus hypothe...

Page 286: ...Company line setup the punch blocks etc At the component level many computer problems stem from the same sources Never never never forget to check Vcc Step 4 Generate a hypothesis Before changing thi...

Page 287: ...e the SYNC LED may flash periodically RECEIVE Lock LEDs The LOCK LED illuminates to indicate that the decoder is receiving valid data When a Receive mode capable of independent operation using the two...

Page 288: ...terface is generally used outside of the USA Canada If you are not using the ISDN U 2 wire interface you can disregard this LED In that case this LED will be flickering FLASHING A slow flash means the...

Page 289: ...re Press the TEL button once to view this screen The same status information is displayed on the default timeout screen The system tries to initialize the ISDN circuit upon boot up ISDN circuits requi...

Page 290: ...plete Ring An incoming call request has been detected and is being processed If auto ans in the TEL menu is set appropriately the system will answer the call momentarily 13 6 2 Using Loop Modes for Tr...

Page 291: ...s set to ISDN Therefore you should receive your own audio back assuming it is configured for compatible Transmit and Receive modes with delay and quality dependant on the coding mode used This tests o...

Page 292: ...Rcv modes must be compatible Are the coding modes set properly The Xmt transmit and Rcv receive modes and the bitrate must be set in conjunction with those of the unit at the other end The Bit Rate an...

Page 293: ...network via a different path What happens if you try a different long distance carrier for the call If you try the call at 56 vs 64 or vice versa Try reversing the direction of the call Try placing a...

Page 294: ...u have and is the Xstream set to match it The telephone company should have given you the ISDN protocol when the line was ordered If you find yourself in the field without this information it is usual...

Page 295: ...igits for example 000 001 try Natl I 1 If that fails try DMS Cust If you were given a single phone number and a single SPID with the format of 01 7 digit phone 0 try AT T Cust Do not enter this SPID I...

Page 296: ...ion from the Appendix of this manual Sometimes the information in the business office computer is wrong By verifying what is programmed into the actual switch you can save time and frustration We ve i...

Page 297: ...request and is awaiting routing information from the network Outgoing Ring Outgoing call in progress far end has acknowledged the call and has generated a call alert signal i e it is ringing Ring xxx...

Page 298: ...ou could be connected to the wrong jack on the back Users in USA Canada should be using the lower RJ11 style jack The LED will come on solidly when all handshaking is completed and the basic low level...

Page 299: ...e USA you can determine who your long distance carrier is by dialing 1 700 555 4141 using the PHONE call type If Intra LATA long distance competition has reached your area you can determine your Intra...

Page 300: ...you are convinced that the problem lies with the ISDN line configuration you may be able to convince the Telco to have an engineer look at the line with an analyzer This works much like the Zephyr Xs...

Page 301: ...oes the Telnet computer have an IP address Are they in the same IP range The Xstream uses IP Internet Protocol IP addresses are required Each device on the network must have unique IP address Can you...

Page 302: ...single Ethernet hub using an Ethernet 100 Base T 100 megabit hub you could connect a limited number of 10 Base T 10 megabit devices In this case you should be able to use eight to nine 10 Base T devic...

Page 303: ...eatedly until the screen contrast is at the desired level Press the SEL button to save your setting NOTE The contrast is somewhat affected by temperature so you may need to tweak this once the unit ha...

Page 304: ...progress is halted The entire message should be noted for discussion with Telos customer support If the failure is does not involve a critical portion of the Xstream you may be given the option to co...

Page 305: ...Layer 2 joint stereo 20 20 000Hz at 48kHz fs 20 15 kHz at 32kHz fs G 722 20 7 500Hz THD N Audio loopback 48kHz fs analog I O input at 1kHz 20dBu 0 004 Dynamic Range A Weighting AAC Layer 3 or 2 end t...

Page 306: ...o network channels for stereo modes AAC Telos Zephyr protocol AAC LD Telos Zephyr protocol Layer 3 FHG Telos Zephyr Buchta protocol Layer 2 CCS CDQ protocol compatible Optional V 35 X 21 Direct Digita...

Page 307: ...orts Eight bi directional inputs outputs for end to end contact closure emulation Inputs Open collector closure to ground Integral pull up Supports up to 24 volts DC inputs Outputs Sink up to 125 mA t...

Page 308: ...authorized dealers be liable for incidental or consequential damages or for loss damage or expense directly or indirectly arising from the use of any Product or the inability to use any Product either...

Page 309: ...ant codecs At the time of the release of this manual we had tested interoperability with the following ISDN codecs CCS Musicam CDQ 1000 CDQ 2000 CDQ Prima Roadrunner Comrex Nexus DXP DXR Dialog 4 VP P...

Page 310: ...USER S MANUAL Appendix 1 Codec Interoperability Information 298...

Page 311: ...of broadcasters and sound studios using codecs maintained by Jay Rose s Digital Playroom a broadcast promo studio in Boston These sites have submitted their names so other professionals can call them...

Page 312: ...rancisco CA 415 274 8800 Service to recording studios and broadcasters Operates about five hundred sites mostly at recording studios They handle billing and booking etc Provides translation service Of...

Page 313: ...d party number is in a valid format it is not currently allocated assigned Cause No 2 No route to network Prefix 0 dialed in error This cause indicates that the equipment sending this cause has receiv...

Page 314: ...y the network In the case of user determined user busy it is noted that the user equipment is compatible with the call Cause No 18 No far end response No user responding This cause is used when a call...

Page 315: ...nouncement This cause indicates that the called party cannot be reached because the called party number is not in a valid format or is not complete or This cause indicates the user should be returned...

Page 316: ...y the other side of the interface Cause No 47 Resource unavailable New Destination This cause is used to report a resource unavailable event only when no other cause in the resource unavailable class...

Page 317: ...support the bearer capability requested Cause No 66 Channel type not implemented This cause is returned when the called party has reached a channel type not supported Cause No 69 Requested facility no...

Page 318: ...tes that the message received is not compatible with the call state or the message type is non existent or not implemented Cause No 99 Info non existent or not implemented call processed This cause is...

Page 319: ...ror unspecified This cause is used to report a protocol error event only when no other cause in this class applies Among other things this cause may be displayed if you failed to dial a 9 or 8 for an...

Page 320: ...USER S MANUAL Appendix 3 ISDN Cause Phrases Values 308...

Page 321: ...indicated by a line status of Wait on the ISDN status screen Certain Telcos will leave the last 00 or 01 off the end of your SPID when giving it to you For the latest list check Telos Systems web page...

Page 322: ...ZZZ0 Or XXXXYYYZZZZ Or SPID1 XXXYYYZZZZ00 SPID2 XXXYYYZZZZ01 Or SPID1 XXXYYYZZZZ0000 SPID2 XXXYYYZZZZ0001 Or SPID1 XXXYYYZZZZ0000 SPID2 XXXYYYZZZZ0101 Nextlink XO XXXYYYZZZZ Or XXXYYYZZZZ1 Or XXXYYYZZ...

Page 323: ...01YYYZZZZ000 Or 01YYYZZZZ00 Or XXXYYYZZZZ01 Sprint Centel XXXYYYZZZZ100 Or XXXYYYZZZZ0000 Or SPID1 XXXYYYZZZZ000 SPID2 XXXYYYZZZZ100 Standard Telephone GA SPID1 XXXYYYABCDCD SPID2 XXXYYYEFGHGH last t...

Page 324: ...USER S MANUAL Appendix 4 Known Working SPID Formats by Telco 312...

Page 325: ...by our founder Steve Church and contain a lot of new material It will be available on the Tech Talk section of our website at http telos systems com Newton s Telecom Dictionary 21st Edition and counti...

Page 326: ...s Fred Huffman A title in the Focal Press Media Technology Professional Series 2004 http www elsevierdirect com product jsp isbn 9780240805894 Other Murphy s Law and Other Reasons Why Things Go Wrong...

Page 327: ...nels are different and we thought that it would add unnecessary confusion to list all options when a number would not be useful for a given situation ETHERNET MODES The Zephyr Xstream s Ethernet mode...

Page 328: ...hand the QOS quality of service of the IP network is less critical the lower the bit rate used Disconnect all clients This allows you to terminate the connections to Xstreams or other players current...

Page 329: ...idth to audio streaming STREAMING DEFINITIONS Pull Only The connection in this type of stream is initiated by the listener client The client contacts the sender server requesting a stream to be sent T...

Page 330: ...eaming mode RTP is a transport protocol not a connection protocol which is why it works in this way The connection protocol is the user hitting the Dial button SIP Unlike RTP SIP is a connection proto...

Page 331: ...streaming TCP Port Default 8800 This port is currently unused FIREWALLS AND ROUTERS The Internet works because there is a central authority for doling out IP addresses Any given connection to the int...

Page 332: ...chine that initiated it THE ZEPHYR XSTREAM BEHIND A FIREWALL In our world we will always have a studio codec and a remote codec so there are always two Xstreams to consider For this discussion we ll a...

Page 333: ...rd other ports and have the remote admin change their UDP port to match yours SIP Mode Since SIP mode is bidirectional we ll discuss Dialing and Answering rather than Sending and Receiving Answering A...

Page 334: ...IP address of the desired stream use the or key of the character 3 Press DIAL again w IMPORTANT TIP The system will automatically determine the coding mode and bit rate automatically h HOT TIP IP add...

Page 335: ...er 3 offers operation at 112 128 and 256 kbps only This is because at 384 kbps Layer 2 or AAC is preferred over Layer 3 96 kbps operation is offered only in AAC CODEC MENU in V 35 Single mode Transmit...

Page 336: ...above These and the other AAC LD modes modes are important since they offer significantly lower delay than any mode other than G 722 Offers 14 kHz audio frequency response AAC LD Mono This encodes a...

Page 337: ...it mode used at the far end The Xstream s Receive modes in V 35 Single mode are L3 Receives all Layer 3 modes available in V 35 Single mode L2 Receives all Layer 2 modes available in V 35 Single mode...

Page 338: ...8 kHz 48 kHz Layer 2 Mono 32 kHz 48 kHz 32 kHz 48 kHz 32 kHz 48 kHz 48 kHz Not Supported Layer 3 Stereo 32 kHz 48 kHz 32 kHz 48 kHz 32 kHz 48 kHz 32 kHz 48 kHz Not Supported Layer 3 Mono 32 kHz 48 kHz...

Page 339: ...ufacturers can usually use the D channel From the perspective of telephone network routing each channel appears to be a separate line with its own number and independent dial out capabilities Since ea...

Page 340: ...device called a Network Termination Type 1 converts this to the two pair 4 wire S interface The Zephyr Xstream includes a built in NT1 This is for use in the USA Canada You should not connect to the...

Page 341: ...itical you may wish to request that the Telecom disable line deactivation FAXABLE ISDN ORDER FORMS FOR ETS 300 Following form may be used to place orders for ISDN lines in countries using the ETS 300...

Page 342: ...ts the ETS 300 N et3 protocol It can be used in a Point to Point PP or Point to Multipoint PMP configuration Unless otherwise requested please provide for MP operation Modular Jack We require a standa...

Page 343: ...r facility on two wires just like plain old telephone service POTS From the perspective of telephone network routing each channel appears to be a separate line with its own number and independent dial...

Page 344: ...13 566 3282 GTE 800 GTE 4WCN 800 483 4926 www gte com Natco 800 775 6682 ext 288 www natconet com Nevada Bell Small Business 702 333 4811 Large business 702 688 7100 Pacific Bell 800 4PB ISDN 800 472...

Page 345: ...dated the NI 1 standard and a few switches may not been upgraded to the new format In that case you would need to use one of the older custom protocols There is also a newer NI 2 standard but it is de...

Page 346: ...hyr Xstream indicates that this is a CSD call over the D channel when the call is set up CSV is for interworking with voice phone service and allows ISDN to interwork with analog phone lines and phone...

Page 347: ...eed to try both The Zephyr Xstream provides standard rate adaptation officially known as CCITT V 110 from 56 to 64 kbps and vice versa when required Bitrate adaptation happens automatically within the...

Page 348: ...or having both CSD and CSV If you use IOC ISDN Order Code Capability Packages please use Capability Package S unless otherwise specified by the user If you do not use IOCs use the information on the p...

Page 349: ...NOTE for EWSD running NI 2 Switch must be programmed CLID DN Note for AT T Lucent 5ESS on loop extended lines Per Lucent Technologies REX test must be disabled for this line using one of the followin...

Page 350: ...features such as packet mode data multiple call appearances Electronic Key Telephone Service EKTS shared directory numbers accept special type of number intercom groups network resource selector modem...

Page 351: ...all pin positions populated however the numbering would still begin with the first position For instance the RJ 11 style jack is a 6 position 4 pin jack Therefore it has pins 2 3 4 5 Pins 1 6 may be...

Page 352: ...Pin out Traditionally Ethernet 10Base T cables use the Green and Orange pair of the TIA EIA 568 A T568A or TIA EIA 568 A T568B wiring configuration The full 4 pair TIA EIA 568 A T568A or T568B configu...

Page 353: ...osition 8 pin miniature jack RJ 45 style The standards specify the compatibility between the 6 position plug and 8 position jack so either can be used For this reason we prefer the 6 position connecto...

Page 354: ...at the top ISDN S interface cable Worldwide PIN COLOR DECRIPTION PIN 1 White Green PS 3 power ground Optional 1 2 Green PS 3 power Optional 2 3 White Orange Xmt TE to NT1 to Network 3 4 Blue Rcv NT1...

Page 355: ...TION 1 No Connection 2 No Connection 3 S Transmit to network 4 S Receive from network 5 S Receive from network 6 S Transmit to network 7 PS2 Power 48 VDC 8 PS2 Power ground The S interface is a standa...

Page 356: ...USER S MANUAL Appendix 9 Modular Cable Guide 344...

Page 357: ...Behind the PBX This is our own term and refers to when one privately owned phone system is tied to another privately owned phone system The most common application is when a key system is connected t...

Page 358: ...y just lose packets instead only circuit switched networks Blue Alarm Also called an Alarm Indicating Signal AIS A keep alive signal sent if a problem occurs mid span in a T carrier system The blue al...

Page 359: ...s are all from the LEC out of a public switch Offers CLASS like features for business users such as 4 digit inside dialing hold transfer attendant etc CEPT Conference on European Posts Telecommunicati...

Page 360: ...f the ability of modern SS7 technology s ability to transmit information about the calling party CLASS includes such features as Caller ID Automatic Callback Call Trace initiated by subscriber Selecti...

Page 361: ...erm The number that has been dialed See Called Party Address CSD Circuit Switched Data A dial up data communications channel which once established looks like a transparent data pipe Also the type of...

Page 362: ...one numbers DID numbers are associated with a given trunk group however there is no one to one correspondence between the individual channels and these numbers The PBX uses the DID number given it by...

Page 363: ...n band signaling The standards define 16 tone pairs 0 9 and A F although most terminals support only 12 of them 0 9 and These are also sometimes referred to as Touch Tones Note that while digital data...

Page 364: ...lly Telcos may call these ground start lines See Loop Start Trunk See also Glare HDB3 High Density Bipolar 3 An E1 line coding method This is the more modern line coding method of the two commonly ava...

Page 365: ...nically the RBOCs were not allowed to sell CPE under the terms of the breakup of AT T With the current state of deregulation the RBOCs are slowly re entering this business Interexchange Carrier See IE...

Page 366: ...lephone Directory and given to customers Sometimes called a Pilot Number See also DN and Hunt Group LE Local Exchange European term for Central Office See CO LEC Local Exchange Carrier Your local tele...

Page 367: ...ision Another name for CPC See CPC Loop Qualification Process of actually measuring the loss on a prospective ISDN line to see if it can be used for ISDN service The actual loss on the line usually me...

Page 368: ...er equipment terminating a digital line at the customer s premises In many countries the NCTE is provided by the Telco The USA is not one of those countries Network Channel Terminating Equipment See N...

Page 369: ...r ISDN BRI service usually over the S Interface A few vendors are now offering BRI over the U interface as well PRI over DSX 1 T1 or E1 is also offered in some cases Be wary of these ISDN protocols si...

Page 370: ...ireTM RBOC Regional Bell Operating Company USA One of the regional companies formed when AT T was forced out of the local telephone business Each RBOC or baby bell owns a number of the former Bell Ope...

Page 371: ...used in North America do SF Superframe A type of Line format supported on T1 circuits The Telco determines the line format and line encoding of your line ESF is the preferred Line Format on T1 circui...

Page 372: ...n efficiency can be made Also referred to as silence suppression See Circuit Switched Subscriber The customer of a Telecommunications company This term dates back to when a local Telephone Company was...

Page 373: ...om the DTE towards the DCE or network Also a light on a modem or CSU DSU that lights to indicate presence of this signal TEI Terminal Endpoint Identifier An OSI Layer 2 identifier used by an ISDN term...

Page 374: ...cally many CO switches could not make trunk to trunk connections as opposed to tandem and long distance switches that are always used to connect trunk together Hence the need to distinguish between th...

Page 375: ...ecific switch The switch brand and model plus the variant defines the ISND protocol Applies to configuring the 2101 See ISDN Protocol Virtual ISDN An alternative to repeaters which uses a local Telco...

Page 376: ...USER S MANUAL Appendix 10 Glossary 364...

Page 377: ...22 43 Balance Detailed 200 Guided Tour 91 Basic Operation Installation 59 Bit Rate Guided Tour 98 Bit Rate introduction 79 bit reservoir 123 Bitrate Detailed 213 CASCADING 126 cascading coders 126 CCI...

Page 378: ...Audio Coding Technology 111 IP Settings 230 ISDN Background 135 Basic Rate Interface 136 Can t get READY indication 284 ETS 300 Order Form 332 Order form for USA Canada 338 Ordering ISDN for the USA...

Page 379: ...C LD 120 Basic Principles 112 Cascading 126 Choosing the Best Coding Mode for Your Application 128 Choosing the Best Transmit Mode for your application applications guide 172 G 722 124 Lossless 112 MP...

Page 380: ...Tel Menu 61 Guided Tour 101 TEL Menu Detailed 216 Tel Status Connected 101 Ready 101 When using Ethernet 219 When using ISDN 216 When using V 35 218 TEL Status Screen Using to troubleshoot 279 Telco D...

Page 381: ...Index 369 Installation 155 Voice over applications 174 Volume 230 Volume front panel 108 WARRANTY 295 298 Web Browser Control via 261 Zephyr Remote 262...

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