Black Box MX270A Скачать руководство пользователя страница 1

Страница: 1 / 70

CUSTOMER

SUPPORT

INFORMATION

Order

toll-free

in the U.S.: Call

877-877-BBOX

(outside U.S. call

724-746-5500

)

FREE technical support 24 hours a day, 7 days a week: Call

724-746-5500

or fax

724-746-0746

Mailing address:

Black Box Corporation

, 1000 Park Drive, Lawrence, PA 15055-1018

Web site:

www.blackbox.com

• E-mail:

[email protected]

AUGUST 1998

MX270A

MX270AE

MX271A

MX271AE

MX272A

MX272AE

MX273A

MX273AE

MX274A

MX274AE

MX275A

MX275AE

MX276A

MX276AE

MX277A

MX277AE

Data Voice Multiplexors

TEST

PWR

SYNC
LOSS

RD (ER)

PATT

RLB

L
V

DATA

VOICE MUL

TIPLEXOR

Содержание MX270A

Страница 1: ...0 or fax 724 746 0746 Mailing address Black Box Corporation 1000 Park Drive Lawrence PA 15055 1018 Web site www blackbox com E mail info blackbox com AUGUST 1998 MX270A MX270AE MX271A MX271AE MX272A M...

Страница 2: ...perated in a commercial environment Operation of this equipment in a residential area is likely to cause interference in which case the user at his own expense will be required to take whatever measur...

Страница 3: ...aparato el ctrico debe ser montado a la pared o al techo s lo como sea recomendado por el fabricante 8 Servicio El usuario no debe intentar dar servicio al equipo el ctrico m s all a lo descrito en l...

Страница 4: ...r una antena externa deber ser localizada lejos de las lineas de energia 16 El cable de corriente deber ser desconectado del cuando el equipo no sea usado por un largo periodo de tiempo 17 Cuidado deb...

Страница 5: ...ording to EN 41003 and is detailed in the table below Safety Status Ports SELV DATA RS 232 V 24 V 35 TNV VOICE FXO and FXS SELV Safety Extra Low Voltage TNV Telecommunications Network In order to ensu...

Страница 6: ...2 Electromagnetic compatibility Generic immunity standards for residential commercial and light industry Safety EN 60950 1992 93 Safety of information technology equipment including electrical busines...

Страница 7: ...24 2 3 5 Dialup Modem Settings 25 2 3 6 Control over the Main Link Modems 26 2 4 System Bandwidth Utilization 27 2 5 System Timing Considerations 29 3 Installation 30 3 1 Unpacking the DVM 30 3 2 Site...

Страница 8: ...1 Activating a Diagnostic 52 5 1 2 BERT 52 5 1 3 Tone Injection 53 5 1 4 Remote Data Channel Loopback 53 5 1 5 Remote Voice Channel Loopback 54 5 1 6 Remote Main Channel Loopback 54 5 2 Problems That...

Страница 9: ...0 8 kbps for main link data rates from 9 6 to 32 kbps 1 6 kbps for rates from 48 to 128 kbps 3 2 kbps for rates higher than 128 kbps 1 2 Main Link Data Rate 9 6 to 256 kbps autodetected Protocol Synch...

Страница 10: ...s assigned voice channel rate minus overhead NON ADAPTIVE 2 mode Assigned rate sum of this and assigned voice channel rate and overhead must not equal more than 256 kbps Protocol Synchronous Clock Sou...

Страница 11: ...7 2 9 6 or 12 8 kbps Fax Support and Fax Rates In band at 2 4 4 8 7 2 or 9 6 kbps End to End Processing Delay 120 ms Acceptable Bit Error Ratio for Channel 1 x 10 13 or better Interface MX270 MX271 MX...

Страница 12: ...to 13 dBm Frequency Response Referenced to 1020 Hz 300 to 3000 Hz at 0 5 dB 250 to 3400 Hz at 1 1 dB Signal to Distortion Ratio At 9 6 kbps using ITU T Rec G 712 G 713 method 2 From 0 to 30 dBm0 Bett...

Страница 13: ...dance Off hook 150 at 150 mA feed 330 at 25 mA feed On hook More than 1 M AC Input Impedance Off hook 600 On hook 20 k at 20 Hz 70 Vrms Off Hook Return Loss Off hook Better than 22 dB On Hook Ring Det...

Страница 14: ...tone injection on the voice channels Indicators 5 Front mounted LEDs PWR TEST SYNC LOSS TD and RD ER Power From utility power mains outlet through detachable 6 ft 1 8 m power cord and rear mounted IE...

Страница 15: ...d in the proprietary adaptive mode In this mode the DVM dynamically reassigns the link bandwidth normally used by the voice channels to the data channel when both voice channels are idle In this mode...

Страница 16: ...r 12 8 kbps the end to end voice performance is nearly toll quality To improve the perceived link quality the DVM voice channel includes an adaptive echo canceler echo delay less than 8 milliseconds t...

Страница 17: ...ween the DVM and the cable connecting to the user s equipment The data channel can operate at rates of 0 8 to 252 8 kbps depending on the selected mode and the main link s data rate Note that when the...

Страница 18: ...t paths from the equipment to which it is connected The following control lines are used on the main link interface The RTS line which is asserted as long as the DVM is powered The DTR and RI lines us...

Страница 19: ...d For a voice channel equipped with an FXO interface the channel control signal generated by the channel indicates the reception of ringing by that channel The control signal received by that channel...

Страница 20: ...hanges that occur routinely in the adaptive mode Such equipment can then use the highest available data rate and thus achieve the highest possible bandwidth efficiency Non adaptive mode 2 In this mode...

Страница 21: ...self test Internal BERT bit error rate testing facility which allows rapid evaluation of transmission quality without requiring external test equipment Tone injection which allows evaluation of voice...

Страница 22: ...subscribers of the main office PABX without the expense of leasing a dedicated voice line or allocating a full data channel for this purpose Figure 2 1 Typical DVM application in an SNA link In this e...

Страница 23: ...is 19 2 kbps assuming the voice channels operate at 6 4 kbps the guaranteed bandwidth available to the SNA link decreases to 5 6 kbps faster modems for example 28 8 kbps modems would of course increa...

Страница 24: ...erface For a voice channel with FXO interface The detection of incoming ringing at the voice channel interface The indication that a voice channel no longer needs the link to the remote DVM is derived...

Страница 25: ...the slave DVM This asymmetry reflects the way data systems operate the equipment at the master DVM end bridge front end processor etc is assumed to operate continuously so that it is always ready to a...

Страница 26: ...n 108 1 Program the directory number to be dialed by each modem Configure each modem for switching to the originate mode upon assertion of the DTR line and for switching to the answer mode upon detect...

Страница 27: ...main link interface indication of incoming call provided by the dialup modem it asserts the DTR and RTS lines in its main link interface and tries to synchronize to the other DVM In case the DVM does...

Страница 28: ...4 8 6 4 7 2 9 6 12 8 4 8 6 4 7 2 9 6 12 8 Mode Only 9 6 4 2 4 1 6 8 8 12 6 4 4 8 4 1 6 1 6 11 2 14 4 8 8 7 2 6 4 4 0 8 4 0 8 13 6 16 8 11 2 9 6 8 8 6 4 3 2 6 4 3 2 1 6 16 19 2 13 6 12 11 2 8 8 5 6 8 8...

Страница 29: ...2 19 2 9 6 4 8 2 4 7 2 4 8 7 2 4 8 3 6 21 6 14 4 4 8 2 4 9 6 7 2 9 6 7 2 3 6 1 2 24 14 4 7 2 4 8 9 6 9 6 9 6 9 6 1 2 2 4 26 4 19 2 9 6 7 2 14 4 9 6 14 4 9 6 4 8 4 8 28 8 19 2 9 6 7 2 14 4 14 4 14 4 14...

Страница 30: ...any standard rate in the range of 9 6 to 256 kbps is automatically identified by actually measuring the clock frequency The DVM will provide an alarm indication if the measured frequency is not close...

Страница 31: ...apter 5 for test and diagnostics instructions WARNING No repairs should be performed by either the operator or the user such activities should be performed only by a skilled technician who is aware of...

Страница 32: ...ONNECTIONS The DVM has two DB15 female connectors one connector for the data channel and the other connector for the main link and two RJ 45 connectors for the two voice channels Adapter cables are in...

Страница 33: ...ECTRICAL SHOCK HAZARD We strongly recommend that only qualified and authorized service personnel be permitted to access the inside of the DVM Disconnect the unit from all the cables and from the power...

Страница 34: ...2 Unscrew the two large captive screws located on the rear panel 3 Carefully pull the rear panel out The internal boards will slide out together with the panel The DVM has several tall components whi...

Страница 35: ...board which must not be moved Figure 3 2 Identification of the DVM s main board jumpers J1 Sw Enable Disable J11 DTR J2 Mode J10 Grounds ENBL ADAPTIV CNTL ON N ADPT1 N ADPT2 SLAVE CON DIS Front panel...

Страница 36: ...voice channel is idle the DVM automatically reallocates its bandwidth to the data channel The ADAPTIV mode ensures that the main link bandwidth is always fully utilized however not all types of user...

Страница 37: ...or off will be displayed after the DVM units synchronize 3 3 2 C Grounding Selection Jumper J10 This jumper controls the connection between the signal ground lines and the chassis ground line The appr...

Страница 38: ...d on the voice channels module of the DVM unit selected as master are downloaded to the slave unit 3 3 3 A Digitizing Rate Switch SW6 This DIP switch selects the voice channels digitizing rate The swi...

Страница 39: ...ls on the Voice Channels Module SW2 Channel 1 Transmit Level Adjustment SW4 Channel 2 Transmit Level Adjustment SW5 Voice Channel 2 Enable Disable SW6 Rate Selection SW2 Channel 2 Receive Level Adjust...

Страница 40: ...lects the nominal output level of voice channel 1 s receive path SW2 selects the nominal input level of voice channel 1 s transmit path SW3 selects the nominal output level of voice channel 2 s receiv...

Страница 41: ...ng NOTE For the FXO interface the maximum level is 1 dBm so position E should not be selected in an FXO model unit 3 3 4 WHEN YOU RE FINISHED After completing the internal settings reinstall the Data...

Страница 42: ...nels Appendix A lists the pinouts for these connectors and provides information on the adapter cables available for each connector Figure 3 7 The rear panel of the Data Voice Multiplexor 3 4 1 GROUNDI...

Страница 43: ...30 VAC Before first time installation check that the DVM s nominal supply voltage marked on a label on its rear panel matches the nominal voltage available at your mains outlet AC power should be supp...

Страница 44: ...el connector is a DB15 female connector wired as ITU T X 21 When a different interface is selected by means of the internal jumper an interface conversion adapter cable must be inserted between the DV...

Страница 45: ...ULTIPLEXORS 4 Operation 4 1 The Front Panel Indicators and Controls Figure 3 1 shows the front panel of the Data Voice Multiplexor The numbered components are identified in Table 3 1 Figure 3 1 The DV...

Страница 46: ...on the receive pair of the channel selected by means of the SELECT switch item 6 During BERT testing lights when errors are detected 6 SELECT switch Selects a channel for testing by means of the PATT...

Страница 47: ...VM does not fit any of the supported rates or the rate is outside the allowable accuracy limits 4 1 2 CONFIGURATION ERROR INDICATION The flashing of the TEST indicator while the SYNC LOSS indicator is...

Страница 48: ...g the other end into a grounded mains outlet When power is connected the DVM performs self test During self test all the indicators light for approximately half a second then change to their normal st...

Страница 49: ...ains off when a pushbutton is pressed 4 2 4 LOOP ACTIVATION When it is necessary to activate a test loop set the SELECT switch to the position corresponding to the desired channel and then press the R...

Страница 50: ...ults from the BERT test the local DVM must receive on the tested channel a test pattern similar to the transmitted pattern This can be achieved either by connecting a remote loop on the same channel o...

Страница 51: ...together with a remote loopback nor activate simultaneously tone injection at both the local and the remote DVM Tone injection is simultaneously activated on both voice channels therefore it interrup...

Страница 52: ...nnel refer to the various subsections of this section The activation of the tests can be disabled by the internal jumper J1 located on the DVM s main board see Figure 5 2 If troubleshooting is require...

Страница 53: ...n the test is activated a test signal is applied to the selected channel of the DVM The test signal an internally generated 29 1 511 bit pseudo random sequence is internally connected to the input of...

Страница 54: ...attempt to activate tone injection at both ends of the link or to use a remote loopback while the tone is sent will not allow you to hear the tone 5 1 4 REMOTE DATA CHANNEL LOOPBACK During a remote da...

Страница 55: ...the remote main link loopback both the voice and data transmit data are looped back by the remote DVM to the receive side of the local DVM demultiplexed and applied to the two channels as received da...

Страница 56: ...5 2 Remote loopback of the main link Local DVM Voice Channel Interface Voice Channel Interface Data Channel Interface Data Channel Interface Common Logic and Main Link Interface Common Logic and Main...

Страница 57: ...D and RD ERR light Local DVM failed self test Make sure the voice channels module is installed If it is call Black Box for technical support TEST flashes SYNC LOSS lights TD and RD ERR off Local DVM d...

Страница 58: ...PABX and an FXS interface must be connected to a telephone set Check the connection cables 2 Problem at local DVM Activate tone injection at the remote DVM and check that the test tone is heard Deact...

Страница 59: ...sistance if you have a complete description including the nature and duration of the problem when the problem occurs the components involved in the problem any particular application that when used ap...

Страница 60: ...erface connectors of the Data Voice Multiplexor and its adapter cables Note that the adapter cables for the link and data channels are identical despite some slight differences in the pin functions In...

Страница 61: ...own in Table A 1 Table A l Main Link and Data Channel Interface Connectors and V 35 Adapter Cable Connectors DB15 M 34 V 35 Direction Function Interface Adapter Circuit Connector Cable Ref LINK DATA P...

Страница 62: ...in Link and Data Channel Interface Connectors and RS 232 V 24 Adapter Cable Connectors DB15 DB25 V 24 Direction Function Interface Adapter Circuit Connector Cable Ref LINK DATA Pin X 21 Connector Pin...

Страница 63: ...EXORS A 2 Voice Channel Interfaces The voice channel interface has 8 pin RJ 45 connectors but only the two center pins Pins 4 and 5 are used In both the FXO and FXS interfaces Pins 4 and 5 carry 2 wir...

Страница 64: ...or either installation This Appendix provides step by step installation instructions for each option WARNING Disconnect all the cables from the units and then disconnect the units from power while per...

Страница 65: ...pare the unit for rack installation 1 Attach the two brackets to the side walls of the unit Each bracket is fastened by means of two screws with flat washers which are inserted into the two front hole...

Страница 66: ...unit rack adapter kit includes two rails for attaching the two units side by side two short adapter brackets and various hardware Refer to Figure B 2 and prepare the two DVM units for attachment as di...

Страница 67: ...holes on the unit wall 5 Use the same procedure to attach the second rail to the left hand wall of the unit intended to on the right Make sure the wider rim of this rail is opposite the short rim of t...

Страница 68: ...without prior written approval by the manufacturer DISCLAIMERS No representation or warranties for fitness for any purpose other than what is specifically mentioned in this manual are made either by...

Страница 69: ...68 NAME...

Результаты поиска

Содержание MX270A

Отзывы:

Похожие инструкции для MX270A

Бренды по названию

Популярные бренды

Black Box MX270A, Руководство пользователя

Результаты поиска

Содержание MX270A

Отзывы:

Похожие инструкции для MX270A

Бренды по названию

Популярные бренды