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Chapter 4. Operation

18

ISU 128 User Manual

61202.029L2-1

Configuration Screen

Once the unit is selected using the terminal interface, the display shows the
Configuration Menu (see Figure 4-2). This screen shows the current configura-
tion, line, and call status for the selected unit. See the chapter Configuration for-
more information about configuring the ISU 128.

Figure 4-2

VT 100 Configuration Screen

To configure the ISU 128 quickly and easily for most applications, see the
chapter Quick Setup.

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Summary of Contents for ISU 128

Page 1: ...ISU 128 128 kbps ISDN Service Unit USER MANUAL Part Numbers 1202029L2 115 VAC 1202029L3 115 VAC with V 34 Modem Option 61202 029L2 1D January 1998 ...

Page 2: ...k and LZS is a trademark of Stac Electronics Windows is a registered trademark of Microsoft Corporation 5ESS is a registered trademark of AT T Windows 95 is a registered trademark of Microsoft Corporation MNP is a registered trademark of Microcom Incorporated 901 Explorer Boulevard P O Box 140000 Huntsville AL 35814 4000 Phone 205 963 8000 1998 ADTRAN Inc All rights reserved Printed in USA ...

Page 3: ...pment operations or procedures that could affect the proper operation of your equipment If they do you will be given advance notice so as to give you an opportunity to maintain unin terrupted service 3 If you experience trouble with this equipment ISU 128 please contact ADTRAN see inside back cover for repair warranty information The telephone company may ask you to disconnect this equipment from ...

Page 4: ...rference to radio or TV reception which can be determined by turning the equipment off and on The user is encouraged to try to correct the interference by one or more of the following measures Reorient or relocate the receiving antenna Increase the separation between the equipment and receiver Connect the equipment into an outlet on a circuit different from that to which the receiver is connected ...

Page 5: ...iring associated with a single line individual service may be extended by means of a certified connector assembly telephone extension cord Compliance with the above conditions may not prevent degradation of service in some situations Repairs to certified equipment should be made by an authorized Canadian mainte nance facility designated by the supplier Any repairs or alterations made by the user t...

Page 6: ...Capability B 10 Capability C 10 Chapter 3 Installation 11 Network Connection 11 DTE Data Connection 12 Dial Interface Connection 12 Maintenance Interface 13 Chapter 4 Operation 15 Menu Navigation 15 Getting Started 16 Status Buffer 16 VT 100 Terminal Menu Support 17 Status Screen 17 Configuration Screen 18 Chapter 5 Testing 19 TEST Options 19 Loopback DTE 20 Loopback Network 20 Loopback Protocol 2...

Page 7: ...c or EON 30 5 sec or EON default 30 10 sec or EON 30 20 sec or EON 30 Wait for EON 30 AT Commands 30 Using AT Commands 31 Using S Registers 31 Reading S Registers 32 Reading S Register Strings 32 Changing S Registers 32 Changing S Register Strings 32 Dialing a Call Using the AT Command Processor 32 V 25 bis 33 V 25 ASYNC Dialing 34 V 25 SYNC HDLC Dialing 35 V 25 SYNC BISYNC Dialing 35 V 25 HDLC FL...

Page 8: ...ol Options 47 Protocol Options 47 Clear Channel 48 BONDING Mode 1 48 TXINIT 49 TXFA 49 TXADD01 50 TXDEQ 50 TANULL 50 TCID 50 V 120 50 V 110 51 V 34 51 Error Control 51 Compression 52 Microcom Network Protocol Block Size MNP Blk 52 DSU 57 6 ASYNC 53 T Link 53 Simple ADTRAN Protocol SAP 53 FALLBACK 54 Point to Point PPP Async to Sync 56 Point to Point Protocol PPP 56 Multilink Point to Point Protoco...

Page 9: ...uration 71 Remote Configuration 71 Configuring with AT Commands 71 Configuring and Testing with the Front Panel or VT 100 Terminal 72 Configure Remote Unit 73 Remote Testing 74 Loopback Remote 1B 74 Loopback Remote 2B 74 Set Password 74 Chapter 11 Troubleshooting 77 If Self Test Fails 77 If The ISU 128 Does Not READ READY 77 Chapter 12 Specifications 83 Specifications and Features 83 Network Inter...

Page 10: ...User Manual v Environmental 85 Physical 85 Power 85 Appendix A AT Commands 87 Appendix B Current Status Messages 93 Appendix C Status Buffer Messages 97 Appendix D S Register List 107 Appendix E Connector Pinouts 115 Acronyms 121 Glossary 123 ...

Page 11: ...Table of Contents vi ISU 128 User Manual 61202 029L2 1 ...

Page 12: ...SYNC Menu Tree 35 Figure 6 9 Answer Tone Menu Tree 37 Figure 6 10 Connect Timeout Menu Tree 38 Figure 6 11 Call Screening Menu Tree 38 Figure 6 12 Leased Line Menu Tree 40 Figure 6 13 Limited Distance Modem Application 40 Figure 6 14 Leased Application with Channel Banks 41 Figure 6 15 Asynchronous DTE Options Menu Tree 42 Figure 6 16 Synchronous DTE Options Menu Tree 42 Figure 6 17 Flow Control M...

Page 13: ...ration Screen 72 Figure 10 3 Remote Unit Configuration Screen 73 Figure 10 4 Test Menu Path 74 Figure 10 5 Loopback Remote 1B 75 Figure 10 6 Set Password Screen 75 Figure E 1 EIA 232 RS 530 Interface 115 Figure E 2 V 35 Interface 117 Figure E 3 RS 366 Interface 118 Figure E 4 RJ 45 Interface 118 Figure E 5 Maintenance Port 119 ...

Page 14: ...mmended Operating Modes 7 Table 3 A Maximum DTE Interface Cable Lengths 12 Table 7 A Rate Adaption Protocols 54 Table E A EIA 232 Interface 115 Table E B RS 530 Interface 116 Table E C V 35 Interface 117 Table E D RS 366 Interface 118 Table E E RJ 45 ISDN IFC 118 Table E F Maintenance Port 119 ...

Page 15: ...List of Tables xii ISU 128 User Manual 61202 029L2 1 ...

Page 16: ...ets the Microsoft Windows 95 Plug an Play specifications The file MDMADTN INF is required To obtain this file contact our website at URL of www adtran com ADTRAN technical support The number is located on the inside back cover of this manual From the network ISDN is delivered by a single 2 wire 2B1Q U interface which is connected directly to the ISU 128 ISDN network termination is de signed into t...

Page 17: ...he ISU 128 also supports a leased digital connection that allows data to be transferred at up to 128 kbps over a 2 wire facility using the U interface jack labelled ISDN IFC This type of service is a permanent connection between end points and is sometimes referred to as a leased connection a dedicated connection a nailed up connection a private circuit or a limited distance mo dem connection Thes...

Page 18: ...escribed in Table 1 A A front panel keypad supports config uration test modes test status and dialing see Figure 1 2 Figure 1 2 ISU 128 Front Panel Table 1 A DTE Indicators Indicator Definition RS Request to Send Indicates the DTE is ready to transmit CS Clear to Send Indicates the ISU 128 is ready to transmit TD Transmit Data On when the DTE is transmitting to the ISU 128 RD Receive Data On when ...

Page 19: ... a lengthy process The ISU 128 bridges this transition by supporting communications with exist ing and future network services and equipment The ISU 128 supports com munications with Switched 56 service Switched 56 DSUs 2 wire and 4 wire various ISDN terminal adapters ISDN terminal equipment BONDING com patible inverse multiplexers and analog modems with the optional V 34 mo dem part number 120202...

Page 20: ...D R D L D T R S R DSU CANCEL ENTER 1 2 3 4 5 6 7 8 9 0 R S C S T D R D L D T R S R DSU CANCEL DTE DTE DTE DTE ISU 128 2 Wire SW56 DSU 4 Wire SW56 DSU ISDN U Interface ISDN or SW56 I S D N U I n t e r f a c e TA NT1 BONDING Compatible Inverse MUX Video Codec NETWORK D a t a P a t h 2 W i r e S w i t c h e d 5 6 4 W i r e S w i t c h e d 5 6 D S U Figure 1 3 ISU 128 Interoperability ...

Page 21: ...us rates will support flow control Flow control is required when operating at 115 200 bps using PPP Point to Point Protocol V 120 SAP Sim ple Adtran Protocol or asynchronous bonding Table 1 B shows that a given data rate may be achieved by more than one pro tocol rate adaption selection The table is organized so that selections with the least transport delay are closer to the top of the table for ...

Page 22: ...sync 2400 4800 9600 19200 38400 57600 V 110 Async 1200 2400 4800 9600 19200 38400v V 120 Async 1200 2400 4800 9600 19200 38400 57600 115200f Tlink Async 1200 2400 4800 9600 19200 SAP Async 38400 57600 115200f DIAL 56K BONDING Sync 56000 Clear Chan Sync 48000 56000 PPP Sync 2400 4800 9600 19200 38400 56000 V 110 Sync 2400 4800 9600 19200 V 120 Sync 9600 19200 38400 48000 Tlink Sync 2400 4800 9600 1...

Page 23: ...Chapter 1 Understanding ISDN and the ISU 128 8 ISU 128 User Manual 61202 029L2 1 ...

Page 24: ...rvice provider Request the appropriate IOC for your application They are described in detail in this chapter In some areas ISDN tariffs may warrant the use of ordering codes with less features For example in a particular region there may be additional monthly expense associated with having voice service on each B channel If you have a data only application Capability R previously Generic Data I ma...

Page 25: ... pooling ap plications Modem capability Generic data transfer including remote access and LAN WAN connectiv ity and telecommuting Capability R 2B service Data only Two directory numbers Applications Host data center internet access bulletin board and modem pooling ap plications Data only applications no modem capability Data transfer applications including remote access and LAN WAN con nectivity t...

Page 26: ...abelled ISDN IFC on the rear panel allows connection to ISDN Basic Rate Service provided by the telephone company or to a leased type of service Dial operation uses the ISDN Basic Rate U interface and allows the ISU 128 to dial out over the ISDN network The Leased Line Service can be dedicated 2B1Q data service or a nailed up circuit twisted pair that provides a dedicat ed connection between end p...

Page 27: ...able 3 A Maximum DTE Interface Cable Lengths The RS 530 interface and the V 35 interface support data rates up to 128 kbps The DTE rate is configured from the front panel of the ISU 128 or by using AT commands See the chapter Configuration to configure the ISU 128 with the ap propriate data rates To prevent possible radio frequency interference emissions a shielded V 35 cable is required DIAL INTE...

Page 28: ... disconnect calls This port also allows ADTRAN Technical Support personnel to retrieve vital information from the unit if a problem is encountered during initial configuration of the ISU 128 Most problems can be solved without resorting to this port for assistance In order to activate the Maintenance port ensure the dial mode is either Front Panel or AT commands When the dial mode is set for RS 36...

Page 29: ...Chapter 3 Installation 14 ISU 128 User Manual 61202 029L2 1 ...

Page 30: ...own arrow to scroll through the menu tree To choose an item press the corresponding number on the keypad The item blinks to show that it is selected and has been stored in non volatile memory Press En ter to select the item Press Cancel to exit back through the menu tree It is important to note that some features in the ISU 128 do not immediately take effect upon selection This prevents unintentio...

Page 31: ...sing Cancel repeatedly returns the unit to the Current Status menu While at the Current Status menu pressing any key changes the display to the top of the menu tree The menu tree allows for set up and operation of the ISU 128 from the front panel The main branches of the menu tree follow 1 STATUS 2 TEST 3 CONFIG Configuration 4 DIAL Status Buffer Select 1 STATUS from the top of the menu tree to di...

Page 32: ...es of the menu tree and their hot keys are STATUS Ctl V TEST Ctl T CONFIG Ctl C DIAL Ctl D Status Screen To determine the current status of the unit press Ctrl V to access the Status Screen see Figure 4 1 The Status Screen displays unit information such as the loop status software revision the result of the initial self test and the sta tus buffer messages The most recent message always displays a...

Page 33: ... shows the Configuration Menu see Figure 4 2 This screen shows the current configura tion line and call status for the selected unit See the chapter Configuration for more information about configuring the ISU 128 Figure 4 2 VT 100 Configuration Screen To configure the ISU 128 quickly and easily for most applications see the chapter Quick Setup ...

Page 34: ...ressing Ctl T from any VT 100 terminal screen or selecting 2 TEST from the top of the menu tree on the front panel displays local testing options Figure 5 1 shows the VT 100 terminal test screen and the menu tree is illustrated in Figure 5 2 Figure 5 1 VT 100 Test Screen ...

Page 35: ...toward the network This can be used to allow a far end user to perform a BERT all the way through the network Loopback Protocol Loopback Protocol allows data to loopback toward the network after passing through a selected protocol such as T Link or BONDING See Figure 5 3 for loopback points Figure 5 3 Loopback Points 1 STATUS 2 TEST 3 CONFIG 4 DIAL 1 Loopback DTE 2 Loopback Netw 3 Loopback Proto 4...

Page 36: ...or checker This allows for testing a circuit without any extra test equipment To use this feature both units must be configured for Clear Channel operation and the far end unit must be able to respond to V 54 loopback commands See the chapter Protocol Options to configure the unit for Clear Channel operation The built in 2047 pattern generator checker displays the number of bytes transmitted on th...

Page 37: ...determine the quality of the network connec tion by viewing the number of near end NEBE and far end FEBE block er rors occurring on the ISDN interface A large or incrementing count indicates problems with network equipment An incrementing or large count of NEBEs indicates problems from the switch to the terminal adapter An incrementing or large count of FEBEs indicates problems in the direction fr...

Page 38: ...col call type terminal ID dial options auto answer answer tone connect timeout and call screening To dial calls over the ISDN the unit must be configured for Dial Line The menu path to select Dial line operation is shown in Figure 6 1 Figure 6 1 Dial Line Menu Tree When using a VT 100 terminal press Ctl C to access the Configuration screen then set the Line type option to Dial Line The Configurati...

Page 39: ...an AT T 5ESS NTI DMS 100 or Siemens EWSD In the Far East configure for the NEC switch Call Type The call type can be configured four different ways depending on the type of service used speech audio data 56 kbps or data 64 kbps When placing outgoing calls using the optional V 34 modem the unit must be op tioned for either speech or audio call type Speech Speech directs the call control software to...

Page 40: ...red Data 64 kbps default The default Call type for ISDN service is Data 64 kbps This directs the call control software to request an unrestricted 64 kbps circuit Terminal Identification Terminal identification is assigned by the local telephone company and con sists of a Service Profile Identifier SPID and Local Directory Number LDN Setting the SPID The SPID is a sequence of digits used to identif...

Page 41: ...he network interface from the unit before initially entering and or altering the SPIDs or LDNs Setting the LDN This option allows the entry of 0 1 or 2 LDNs The LDN is used when placing or receiving BONDING calls The LDN is the seven digit local phone number assigned to the line When entering and LDN use the Up and Down arrows to choose between LDN 1 and LDN 2 Press Enter to select the LDN and use...

Page 42: ... 5 20 sec or EON 6 Wait for EON 1 V 25 HDLC 2 V 25 ASYNC 3 V 25 BISYNC 4 V 25 HDLC FLAG 1 2400 2 4800 3 9600 4 19200 5 38400 1 Normal 2 External 6 48000 7 56000 8 64000 9 112000 0 128000 1 Bit Rate 2 Connector Type 1 RS 530 2 V 35 3 RS 232 3 RTS Options 1 1 Ms delay 2 18 Ms delay 4 CTS Options 1 Forced CTS 2 Follows RTS 5 CD Options 1 CD Forced on 2 Normal 3 Off with LOCD 4 Off with Link Down 6 DT...

Page 43: ...Chapter 6 Configuration 28 ISU 128 User Manual ...

Page 44: ...lecting the pound key to go directly to the Dial menu and select ing 1 Hang up line then Enter DTE RS 366 dialers can end a string of dialed numbers in two different ways The end of number EON alerts the ISU 128 that the entire number has been sent Another method is to simply stop sending numbers and allow the ISU to time out then dial the number The ISU 128 supports both methods of dialed number ...

Page 45: ...d if more than 20 seconds elapse since the last digit was entered or the unit receives the EON command Wait for EON The ISU 128 assumes the dial string is fully entered only if the unit receives the EON command AT Commands Configuring the ISU 128 for AT commands enables in band dialing over the DTE interface using asynchronous AT commands AT commands can be used to set up the ISU 128 as well as es...

Page 46: ...nsmitting the Ctl X ASCII 018 after the AT attention code The ISU 128 ignores this command line and issues an OK response The command line may contain a single command or a series of commands af ter the AT attention code When a series of commands are used the individual commands may be separated with spaces for readability The maximum length for a command line is 40 characters Each command line is...

Page 47: ...f the string S register to be changed an equal sign the numeric string to be assigned to the register then press Enter ATSS80 5551212 Dialing a Call Using the AT Command Processor To dial a number using the DTE terminal and AT commands type ATD and the telephone number on one line and press Enter ATD5551212 When the dialing process begins the front panel reads Dialing 5551212 If the call is succes...

Page 48: ...ure 6 5 Dial Options V 25 bis Menu Tree Recommendation V 25 uses the following DCE DTE control signals Transmitted data circuit 103 Received data circuit 104 Ready for sending circuit 106 Data set ready circuit 107 Data terminal ready circuit 108 2 Calling indicator circuit 125 The ISU 128 supports the following V 25 bis commands to control automatic calling and answering CRN call request number i...

Page 49: ...bits even parity and one stop bit However for versatility the ISU 128 allows the data parity and stop bits as defined under Data bits See Figure 6 7 Figure 6 7 Data Bits Menu Tree 3 CONFIG 1 Netw options 2 DTE options 3 Protocol 4 Quick setup 5 Remote config 1 Dial Line 2 Leased Line 1 Switch protocl 2 Call type 3 Terminal ID 4 Dial options 5 Auto answer 6 Answer tone 7 Connect Timout 8 Call Scree...

Page 50: ...yte is either 13 HEX or 03 HEX if not the final pack et V 25 SYNC BISYNC Dialing This setting allows for V 25 bis messages in byte synchronous format BI SYNC V 25 bis specifies that the characters should be ASCII 7 bits and odd parity This setting allows synchronous DTE which does not use HDLC to support serial in band dialing V 25 HDLC FLAG Configuring the ISU 128 for HDLC FLAG V 25 bis enables i...

Page 51: ...he Hang up line command or answered using the Answer Call command These commands are listed under the Dial branch of the main tree See the chapter Dial Options for more detail Enabled When Enabled is selected the incoming call is answered If that call is a BONDING call and requires two B channels the second call is answered If the unit is configured for a call that uses only one B channel such as ...

Page 52: ...B level with phase reversals every 475 ms Figure 6 9 Answer Tone Menu Tree No Answer Tone Default This option disables Answer tone on incoming calls Incoming Tone This option enables Answer tone on incoming calls Outgoing Tone This option enables Answer tone on outgoing calls Always Tone This option enables Answer tone on either incoming or outgoing calls 3 CONFIG 1 Netw options 2 DTE options 3 Pr...

Page 53: ...e When Call Screening is set to answer any numbers if stored in SN0 through SN9 Ansr if SN0 9 an incoming call is not answered if the Call ID received from the switch does not match a stored number Depending on the switch protocol the Call ID may be presented in either a seven or ten digit format 3 CONFIG 1 Netw options 2 DTE options 3 Protocol 4 Quick setup 5 Remote config 1 Dial Line 2 Leased Li...

Page 54: ...phone number should be stored 1 Select Ansr if SN0 9 under Call Screening 2 Store your seven digit number in SN0 3 Place a call to the ISU 128 with the stored number to determine whether it answers properly 4 If the ISU 128 does not answer the call look at the Call ID message in the Status buffer An explanation of Status buffer messages is located in the appendix Status Buffer Messages More than l...

Page 55: ... Slave Master By configuring the ISU 128 for Master timing the ISU 128 can provide clock ing for both ends of the phone line This Master option is used at one end of a limited distance modem application where two ISU 128 units are directly con nected without the use of channel banks see Figure 6 13 The far end unit should be configured for Slave and it derives its clocking from the ISU 128 configu...

Page 56: ...o the chapter Quick Setup Figure 6 14 Leased Application with Channel Banks Channel Rate In Leased Line operation the data rate for the ISU 128 can be configured for 64 kbps or 128 kbps When 64 kbps is selected only one bearer channel B1 is used When 128 kbps is selected both bearer channels B1 and B2 are used XXXXX XXXXX XXXXXXXXX X X X X X X X X X X X X X X X X X X X ENTER 1 2 3 4 5 6 7 8 9 0 RS...

Page 57: ...nous DTE Options Menu Tree Bit Rate The Bit Rate can be set asynchronously for 300 1200 2400 4800 9600 19200 38400 57600 and 115200 bps The Bit Rate can be set synchronously for 2400 4800 9600 19200 38400 48000 56000 64000 112000 and 128000 bps 3 CONFIG 1 Netw options 2 DTE options 3 Protocol 4 Quick setup 5 Remote config 1 Bit Rate 2 Connector Type 3 RTS Options 4 CTS Options 5 CD Options 6 DTR O...

Page 58: ...OCD causes the CD signal to be disasserted for a period of 5 seconds then reasserted at the termination of a call Selecting Off with Link Down causes the CD signal to be disasserted when the U interface is not present DTR Options Selecting Ignore DTR causes the ISU 128 to disregard the state of the data ter minal ready DTR pin Cmd when Off forces the unit into the AT command processor mode when DT...

Page 59: ...erface is in test or there is not an active call OFF Link Down causes DSR to be disasserted if the network interface is disrupted Flow Control Asynchronous Data Format Selecting Hardware Flow as shown in Figure 6 17 causes the ISU 128 re ceived data to be presented to the DTE interface only when RTS is asserted Software Flow control uses Xon Xoff to control data transferred between the DTE and the...

Page 60: ...ernal transmit clock signal at the DTE connector This signal is echoed by the ISU 128 to the transmit clock signal on the DTE connector This option provides for situations where equipment connected to the ISU 128 DTE connector cannot slave to the ISU 128 provided clock The ISU 128 uses the U interface as the frequency standard when it must provide a synchronous receive or transmit clock The extern...

Page 61: ...Chapter 6 Configuration 46 ISU 128 User Manual 61202 029L2 1 ...

Page 62: ...ate adaptation protocols to support various bit rates and DTE settings Figure 7 1 illustrates the menu tree for set ting protocol options The ISU 128 supports the following rate adaptation pro tocols Clear Channel no rate adaption protocol BONDING mode 1 Bandwidth on Demand Interoperability Group CCITT V 120 CCITT V 110 V 34 for communicating with analog modems V 34 is only available in PN 1202029...

Page 63: ...d 56 DSU In the leased line mode Clear Channel can provide synchronous bit rates of 56 kbps 64 kbps 112 kbps and 128 kbps BONDING Mode 1 The BONDING mode 1 protocol allows the ISU 128 to communicate at bit rates in excess of 64 kbps to a maximum of 128 kbps BONDING provides high speed communication between ISU 128s ISDN TE TAs and inverse multiplexing equipment supporting the BONDING protocol The ...

Page 64: ...n from the answering endpoint before deciding the BONDING call has failed In general this timer value should be left at the factory default setting of 10 seconds Values of 1 2 5 10 default 20 50 100 and 200 seconds may be selected TXFA This option specifies the length of time both endpoints attempt to detect the BONDING frame pattern when a call is connected before deciding the BOND ING call has f...

Page 65: ...n from the originating endpoint before aborting to clear channel mode In general this timer value should be left at the factory default setting of 10 seconds However it may be necessary to shorten this timer if the DTE equipment connected to the ISU also has timer constraints for completing non BONDING parameter negotiation Values of 1 2 5 10 default 20 50 100 and 200 seconds may be selected TCID ...

Page 66: ... ISU 128 with optional V 34 modem part number 1202029L3 must be used for operation of this protocol Error Control This option sets the type of error control to be negotiated with the far end mo dem during train up Normal turns all error control off and makes allowances for flow control Reliable MNP uses MNP error control If the far end does not support MNP then the call is terminated When Auto Rel...

Page 67: ...ror controlled stream operation Options available are 64 128 192 and 256 bytes Figure 7 5 V 34 MNP Block Size Menu Tree 3 CONFIG 1 Netw options 2 DTE options 3 Protocol 4 Quick setup 5 Remote config 1 Clear Channel 2 BONDING mode 1 3 V 120 4 V 34 5 V 110 6 DSU 57 6 ASYNC 7 T LINK 8 SAP 9 FALLBACK 0 PPP asyn sync 1 Error Ctrl 2 Compression 3 MNP Blk Size 1 No Compression 2 Compress MNP5 3 Compress ...

Page 68: ...a subrates of 64 kbps to the 64 kbps bandwidth of the ISDN bearer channel For asynchronous and synchronous DTE rates up to 19 2 kbps T Link transmits the status of the DCE DTE EIA leads to facilitate flow control and maintenance In addition to 2 wire Switched 56 DataPath DUs the ISU 128 can communicate with any other device that uses the T Link protocol Figure 7 1 shows the menu path for selecting...

Page 69: ...o 115 2 kbps which is supported by the DTE Flow control must be enabled and supported by the DTE FALLBACK supports the following protocols based on the call type BOND ING Mode 1 V 120 T Link and V 34 When answering calls the ISU 128 uses the incoming call type to determine which rate adaption protocols to support See Table 7 A for the call type and the supported rate adaption protocols Table 7 A R...

Page 70: ...e ISU connects the audio call type the V 34 protocol is attempted for V 34 com patible modems Once a call connects if the protocol cannot be negotiated the protocol is negotiated as specified by S11 register default is DSTOP If this protocol fails the call is disconnected If FALLBACK fails to determine which protocol is running the user has the option to select which protocol will run Figure 7 6 i...

Page 71: ...pted by the ISU 128 In addition when the ACCM option is not seen in the configure request packet from the network the ISU 128 adds it to the packet Figure 7 7 PPP Menu Tree Point to Point Protocol PPP The ISU 128 is configured for PPP from the protocol options of the configura tion menu by selecting 1 PPP or by setting S register S27 to a value of 0 Fig ure 7 6 illustrates the menu path for settin...

Page 72: ...ber 1 SN1 If no number is stored in SN1 the same phone number is dialed to es tablish the second link PPP with Compression The ISU 128 is configured for PPP with compression from the protocol options of the the configuration menu by selecting 3 PPP w Comp or by setting S reg ister S27 to a value of 2 When setup for PPP with compression the ISU 128 will negotiate the compres sion control protocol C...

Page 73: ...Chapter 7 Protocol Options 58 ISU 128 User Manual 61202 029L2 1 ...

Page 74: ...nchronous Operation in Chapter 6 for a step by step procedure for configuration of the DTE Options Figure 8 1 Quick Setup Menu Tree Option 1 DIAL 56K sync will always flash upon entry of the Quick Setup Menu re gardless of previous configuration selections 3 CONFIG 1 Netw options 2 DTE options 3 Protocol 4 Quick setup 5 Remote config 1 Dial 56K sync 2 Dial 64K sync 3 Dial 112K sync 4 Dial 128K syn...

Page 75: ...n the following descriptions an asterisk following the option indicates the option requires ISDN switch protocol to be configured Multipoint lines will also require SPID1 LDN1 See the chapter Dial Options Dial 56K sync When the ISU 128 is configured for Dial 56K sync service the following pa rameters are automatically preset Service type ISDN dial line Automatic answering Enabled ISDN call type 56...

Page 76: ...ock source V 54 Loopbacks Accepted Dial 112K sync When the ISU 128 is configured for Dial 112K sync service the following pa rameters are automatically preset Service type ISDN dial line Automatic answering Enabled ISDN call type 56 kbps data Data protocol BONDING mode 1 DTE mode Synchronous DTE connector bit rate 112 kbps DTE flow control none RTS line 1 ms delay CTS line Forced on Transmit data ...

Page 77: ...on Transmit data clock Internal clock source BONDING timer TXINIT 10 seconds BONDING timer TXFA 10 seconds BONDING timer TXADD01 50 seconds BONDING timer TXDEQ 50 seconds BONDING timer TANULL 10 seconds BONDING timer TCID 5 seconds V 54 Loopbacks Accepted Dial PPP When the ISU 128 is configured for Dial PPP service the following parameters are automatically preset Service type ISDN dial line ISDN ...

Page 78: ...re RTS line 1 msec delay CTS line Follows RTS Error Control Auto reliable Compression Compress V42 MNP5 MNP block size 256 bytes This option is only used with the ISU 128 with V 34 modem option part numbers 1202029L3 Dial 57 6 asyn When the ISU 128 is configured for Dial 57 6 asyn service the following pa rameters are automatically preset Service type ISDN dial line ISDN call type 64 kbps data Dat...

Page 79: ... Bits None Stop Bits 1 DTE connector bit rate 115 2 kbps DTE flow control Hardware RTS line 1 msec delay CTS line Follows RTS Fallback 57 6k When the ISU 128 is configured for Fallback 57 6k service the following pa rameters are automatically preset Service type Dial line Automatic answering yes ISDN call type 64 kbps data Data Protocol Fallback DTE mode Asynchronous Data Bits 8 Parity Bits None S...

Page 80: ... rate 128 kbps DTE flow control none RTS line 1 msec delay CTS line Forced on Transmit data clock Normal clock source Ldm 128 Master When the ISU 128 is configured for a point to point application such as a lim ited distance modem LDM arrangement the Ldm 128 Master option auto matically presets the following parameters Service type Leased Line Network clock source Master Channel rate 128K Data Pro...

Page 81: ...flow control none RTS line Forced on CTS line Forced on 1 msec after RTS CD line Turned on when call is up DSR line Forced on Transmit data clock Internal clock source BONDING timer TXINIT 10 seconds BONDING timer TXFA 10 seconds BONDING timer TXADD01 10 seconds BONDING timer TXDEQ 50 seconds BONDING timer TANULL 50 seconds BONDING timer TXID 5 seconds AT Commands Escape character End of Line char...

Page 82: ... Current Status menu displays the front panel available dialing options See Figure 9 2 Access the VT 100 terminal dial options screen Figure 9 1 by pressing Ctl D from any screen The dial options are only available when the ISU is configured for Dial Line operation not Leased Line Figure 9 1 VT 100 Terminal Dial Options Screen ...

Page 83: ...edialing purposes Redial Last Number Redial the last number called or attempted This number is saved as stored number 9 from the last attempted phone call Answer Call Selectively answer incoming calls when Auto Answer is configured for dis able Auto Answer is described in the section Auto Answer in Chapter 6 Dial Stored Number Dial one of ten stored phone numbers The Up and Down arrows permit view...

Page 84: ...N9 To store a number scroll to the desired stored number location enter the number to be stored and press Enter to save the number If a mistake is made use the Up and Down arrows to edit the number Press Enter to save the number and exit Press Cancel to exit with out changing the number The Dial Options Menu must be exited after dialing in order for CD carrier detect to be activated ...

Page 85: ...Chapter 9 Dial Options 70 ISU 128 User Manual 61202 029L2 1 ...

Page 86: ...tory Default Configuring with AT Commands A remote unit can be configured by issuing an ATD command with the phone number of the remote unit plus a dial string modifier The configuration com mand syntax is ATD nnnnnnn 6 yyyyyy Where nnnnnnn is the remote number to call and yyyyyy is a password of up to six digits After the connection is established AT commands issued to the local unit are sent to ...

Page 87: ...el is shown in Figure 10 1 Figure 10 1 Remote Configuration Menu Path When using the VT 100 terminal interface select the main menu option Cfg Rmt Unit The Remote Configuration screen appears as shown in Figure 10 2 Figure 10 2 Remote Configuration Screen 5 Remote config 1 Cfg Rmt Unit 2 Set Password 3 Loopback remote 1B 4 Loopback remote 2B 2 DTE options 1 Netw options 3 CONFIG 3 Protocol 4 Quick...

Page 88: ...up to this point cancels the call Pressing Cancel at the first remote display screen or selecting Hang up line disconnects the call Figure 10 2 illustrates the VT 100 terminal screen when Cfg Rmt Unit is se lected from the main menu Enter the remote number to call and press Enter When prompted enter the password and press Enter If a password has not been set for accessing the remote unit press Ent...

Page 89: ...emote number to dial When a connection is established error information is displayed Press 1 Exit Test or Escape to exit the test Figure 10 5 illustrates the VT 100 terminal while testing Loopback Remote 1B Loopback Remote 2B The Lpbk Remote 2B option allows a local unit to call loopback and BERT test a remote unit on two B channels if both the local and remote units are con figured for Fallback p...

Page 90: ...nal is illustrated in Figure 10 6 To set the password choose Set Password from the Main Configuration Menu Type the six digit or less password then press Enter To clear the existing password do not enter numbers for Set Password Just press enter Figure 10 5 Loopback Remote 1B Figure 10 6 Set Password Screen ...

Page 91: ...Chapter 10 Remote Configuration 76 ISU 128 User Manual 61202 029L2 1 ...

Page 92: ...SU 128 While holding down the 0 key power back on Con tinue to press 0 for 15 seconds This will reset all the internal settings to factory defaults 3 If the ISU 128 still does not pass self test call ADTRAN Technical Support for assistance See the back of this manual for phone numbers IF THE ISU 128 DOES NOT READ READY When the ISU 128 has been set up and connected to an ISDN line but the front pa...

Page 93: ...ce provider s wiring The telephone service provider s hardware The telephone service provider s software setup To isolate the problem perform the following procedure A Make sure the ISU 128 is configured for dial line service Check that CONFIG Netw options Dial Line is selected on the menu B Try another piece of functioning ISDN equipment with a U interface on the ISDN line C Talk to your service ...

Page 94: ...To isolate the problem use the following procedure A Ensure the ISU 128 is set up for the correct switch protocol by selecting CONFIG Netw options Dial Line Switch protocl B Ensure the line quality is satisfactory by checking for near and far end block errors NEBEs and FEBEs To do this select Test NEBE FEBE If the counts are non zero and incrementing there may be a physical link problem as describ...

Page 95: ...rminal ID SPID LDN D Try another piece of functioning ISDN equipment with a U interface on the line E With the ISU 128 connected to the ISDN line and powered up talk to your service provider s repair group and tell them you have an ISDN basic rate line that appears physically okay but has no terminal endpoint identifier TEI Ask them to check the line translation and ensure that the line supports d...

Page 96: ...ports dynamic TEI allocation Tell them that you have an NT1 and terminal adapter device connected to the line 7 If the ISU 128 continues to read Register SPID 2 the ISU 128 has com pletely initialized the first phone number but is unable to establish logical layer 3 for the second phone number The problem is in one or more of the following places The ISU 128 software setup The telephone service pr...

Page 97: ...ur service provider s repair group and tell them you have an ISDN basic rate line that appears physically okay but has no terminal endpoint identifier TEI Ask them to check the line translation and ensure that the line supports dynamic TEI allocation Tell them that you have an NT1 and terminal adapter device connected to the line ...

Page 98: ... 45 for ISDN Basic Rate U Interface and Leased 2B1Q service DTE Interface RS 530 V 35 EIA 232 Dialing Selections In band DTE dialing V 25 or AT commands Manual or automatic stored number dialing DTR assertion Dial interface RS 366 Front panel manual dialing Data Rates Network 64 kbps one B channel 128 kbps two B channels Data Rates DTE 300 bps to 115 2 kbps asynchronous 2400 bps to 128 kbps synchr...

Page 99: ...mpatibility AT T 5ESS NTI DMS 100 National ISDN 1 NEC B Channel Aggregation BONDING Mode 1 MP Display Two line by 16 character LCD LED indicators RS Request to Send Indicates the DTE is ready to transmit CS Clear to Send Indicates the ISU 128 is ready to transmit TD Transmit Data On when the DTE is transmitting to the ISU 128 RD Receive Data On when the ISU 128 is receiving data from the far end C...

Page 100: ...TR is active at DTE interface SR Data Set Ready Environmental Operating Temperature 0 to 50 C Storage Temperature 20 to 70 C Relative Humidity Up to 95 non condensing Physical Dimensions 2 25 H x 8 75 W x 11 00 D Weight 3 lbs Power 115 VAC 60 Hz 8 W maximum dissipation part numbers 1202029L2 and 1202029L3 ...

Page 101: ...Chapter 12 Specifications 86 ISU 128 User Manual 61202 029L2 1 ...

Page 102: ...ent call O On line Commands the unit to go back on line S S Register SS S String register Z Reset Resets the AT command processor N0 Number 1 Read far end phone number 1 if service subscribed from telephone company N1 Number 2 Read far end phone number 2 if service subscribed from telephone company R Ram Copy EEPROM configuration to RAM W Save Save current configuration to EEPROM Break in Break in...

Page 103: ...es unit for Dial 64K sync F3 Configures unit for Dial 112K sync F4 Configures unit for Dial 128K sync F5 Configures unit for Leased 128K F6 Configures unit for Ldm 128K master F7 Configures unit for Dial 57 6K async F8 Configures unit for Dial 115 2K async F9 Configures unit for Dial PPP F10 Configures unit for Dial V34 115 2 async F11 Configures unit for FALLBACK 57 6K async Network Options L0 Di...

Page 104: ...Options Z0 Stored number 0 Z1 Stored number 1 Z2 Stored number 2 Z3 Stored number 3 Z4 Stored number 4 Z5 Stored number 5 Z6 Stored number 6 Z7 Stored number 7 Z8 Stored number 8 Z9 Stored number 9 Local Echo Options E0 Echo off Does not allow command characters typed to be displayed on the screen E1 Echo on Determines if the command characters typed are displayed on the screen Unit Identification...

Page 105: ... Options _D0 1 ms delay _D1 18 ms delay Service Profile Identification SPID Access Options _I1 Access SPID 1 _I2 Access SPID 2 Local Directory Number LDN Access Options _N0 Access LDN1 _N1 Access LDN2 ISDN Switch Protocol Options _S0 5ESS _S1 DMS 100 _S2 National ISDN 1 _S3 NEC ISDN U Interface Operational Mode Options _X0 ISU timing slaves to network NT _X1 ISU is U interface timing master LT Dat...

Page 106: ...4 Compression Options C0 No compression C1 Use MNP compression C2 Use V 42 bis compression C3 Use V 42 bis MNP compression V 34 Compression Block Size Options A0 MNP 64 byte blocks A1 MNP 128 byte blocks A2 MNP 192 byte blocks A3 MNP 256 byte blocks V 34 Operational Mode Options N0 MNP Normal N1 MNP Direct N2 Reliable N3 Auto reliable N4 Force LAPM N5 Force MNP ...

Page 107: ...Appendix A AT Commands 92 ISU 128 User Manual 61202 029L2 1 ...

Page 108: ...Connect B1 Bearer channel 1 has been connected and is now active Call Connect B2 Bearer channel 2 has been connected and is now active CALL xxxxxxx The ISU 128 is calling phone number xxxxxxx DISCONNECTING The current phone call is being disconnected hung up DMS 100 Ready The ISU is connected to a DMS 100 switch and is ready to place receive calls Getting TEI 1 The ISU is receiving its first TEI f...

Page 109: ...eceive calls NET EOC LOOPBACK The ISU 128 has been commanded to perform an ISDN loopback toward the network NET REM LOOPBACK The ISU 128 is performing a V 54 or DDS latching loopback toward the net work Register SPID 1 The ISU 128 is registering its first SPID with the network Register SPID 2 The ISU 128 is registering its second SPID with the network RINGING The phone number just dialed is ringin...

Page 110: ...Group protocol CLEAR CHAN No rate adaption protocol allows use of maximum bandwidth DSTOP DSU 57 6 async rate adaption protocol FALLBACK FALLBACK rate adaption protocol PPP Point to point protocol SAP Simple ADTRAN protocol TLINK TLINK rate adaption protocol V110 V 110 rate adaption protocol V120 V 120 rate adaption protocol V34 V 34 modem optional ...

Page 111: ...Appendix B Current Status Messages 96 ISU 128 User Manual 61202 029L2 1 ...

Page 112: ...D The network was unable to deliver access information to the far end Back to on line ISU 128 went back on line Bad async BPS The BONDING protocol determined that the selected asynchronous bit rate is not supported Bad AT bit field User issued an AT command with an argument that was out of range Bad B channel Bonding negotiation determined the delay in one of the Bearer channels was uncorrectable ...

Page 113: ...l is not of a type the ISU128 can accept Bearer info mode Incoming call information transfer capability is not known BONDING XXX The amount of bytes of corrected delay between the B2 and B1 bearer channels XXX can range from 8000 to 8128 bytes BPS mismatch Bonding negotiation found a bit rate mismatch Break to AT cmd User issued a break in request Break ignored User issued an extra break in reques...

Page 114: ... requested has not been implemented CHANNEL_UNACCEPTABLE The channel requested has not been subscribed CID 0 rcvd Received an incoming call from a third party during negotiations with a far end BONDING unit on the use of the second bearer channel DEST NOT ISDN The number called is not ISDN warning only DEST_OUT_OF_ORDER The called number is out of order Dial 1 2 The ISU 128 placed a call on either...

Page 115: ... state but it is not Dump call ISU 128s could not accept an incoming call because it was already involved in a call Dump 1 2 An incoming call on either the first or second channel was discarded by the ISU The calling number is displayed if available FACILITY_NOT_IMPLEMENT The network does not support the requested supplementary service FACILITY_REJECTED A facility requested cannot be provided by t...

Page 116: ...work will not allow an incoming call INCOMPATIBLE_DEST The called number cannot accept the type of call that has been placed INVALID_CALL_REF Call control error INVALID_ELEM_CONTENTS Call control error INVALID_MSG_UNSPEC Invalid message protocol error INVALID_NUMBER_FORMAT The dialed number has an invalid format L1 not up The network interface is not active L2 not up The data link layer interface ...

Page 117: ...e Negotiation fail The BONDING negotiation has failed NETWORK BUSY The ISDN switch is busy and unable to process a call NETWORK_CONGESTION The phone network is currently congested NETWORK_OUT_OF_ORDER The phone network is out of order No 48K Support The ISU 128 does not support 48 kbps TLINK Local DTE setup error NO_CIRCUIT_AVAILABLE The requested bearer channel is not available NO_CARRIER The V 3...

Page 118: ...to end warning only NUMBER_CHANGED The number dialed has been changed OUTGOING_CALL_BARRED The network will not allow the outgoing call to be placed PROTOCOL_ERROR Call control error REQ_CHANNEL_NOT_AVAIL The channel type requested is currently not available Remote not ISU Bonding negotiation determined the far end unit is not another ISU product asynchronous rates can only be supported between tw...

Page 119: ...g Sync BPS 56K The synchronous bit rate selected is too slow for the BONDING protocol Sync Mismatch Both ends Bad Synchronization TAINIT expired Bonding timer TAINIT expired TANULL expired Bonding timer TANULL expired non BONDING equipment attempted to call into the ISU 128 while optioned for BONDING TEMPORARY_FAILURE The network has temporarily failed try the call again TIMER_EXPIRY Call control ...

Page 120: ...TXINIT expired called non BONDING equipment UNASSIGNED_NUMBER The phone number dialed does not exist Unknown AT cmd User issued an unknown AT command UNSPECIFIED_CAUSE Received a cause message from the network that is not understood Unsupported baud The ISU 128 does not support the negotiated baud rate USER_BUSY The dialed number is busy V120 timeout The far end unit is not set up for V 120 V120 c...

Page 121: ...Appendix C Status Buffer Messages 106 ISU 128 User Manual 61202 029L2 1 ...

Page 122: ...CII code CHARACTER ends a command line The standard end of line character is the carriage return ASCII value of 13 decimal Range 0 to 127 S4 LINE FEED Determines which key or character in ASCII code CHARACTER advances the cursor to the next line after ending a command line or after an ISU 128 message The standard character is the line feed ASCII value of 10 decimal Range 0 to 127 S5 BACK SPACE Det...

Page 123: ...nables AT responses from the ISU 128 Bit 3 1 Disables AT responses from the ISU 128 Bit 4 1 Enables AT responses to be displayed in text form Bit 4 0 Enables AT responses to be displayed in numeric form Bit 7 1 Disables PPP ACCM Spoofing Bit 7 0 Enables PPP ACCM Spoofing Bit 8 1 Ring indicator uses cadence Bit 8 0 Ring indicator remains on S15 ASYNC BONDING 0 ADTRAN Only 1 Multi Vendor S22 MSG BIT...

Page 124: ...y DSR signal on the DTE connectors 0 Force DSR on always 1 DSR off OOS Test 2 DSR off Link Down S33 DTE CD Controls the operation of the carrier detect CD line on the DTE connectors 0 Force CD on always 1 CD is active during a call normal operation 2 Off with LOCD S34 DTE DTR Determines how the ISU 128 responds to changes in DTR This is a bit mapped register 0 Ignore DTR 1 Force AT command mode wh...

Page 125: ...2 4 error correction can be used S37 V34 Enables compression in the V 34 modem COMPRESSION 0 No compression 1 MNP5 compression 2 V42 compression 3 MNPS or V42 compression S38 V34 BLOCK SIZE Sets the amount of data sent in a single packet during MNP error controlled stream operation 0 Block size of 64 bytes 1 Block size of 128 bytes 2 Block size of 192 bytes 3 Block size of 256 bytes S40 BOND TXINI...

Page 126: ...ssary to shorten this timer if the DTE equipment connected to the ISU 128 also has timer constraints for completing non BONDING para meter negotiation Range 0 to 255 10 sec is default S45 BOND TCID The number of seconds both endpoints attempt to negotiate agreeable values for bearer channels and channel capacities before deciding the BONDING call has failed Range 0 to 255 5 sec is default S46 V25 ...

Page 127: ...kbps data 3 64 kbps data S54 PROTOCOL Rate adaption protocol type TYPE 1 Clear Channel no rate adaption 2 BONDING mode 1 3 SAP simple ADTRAN protocol 4 T link 5 V 110 6 V 120 7 V 34 9 DSU 57 6 kbps asynchronous 11 FALLBACK 12 PPP async to sync S55 DIAL MODE Selects dialing interface 0 Front panel only always available 1 RS 366 dialing port 2 AT commands 3 V 25 bis dialing S56 ECHO TONE Enables an ...

Page 128: ...s matching those stored in SN0 through SN9 S59 CHANNEL RATE Sets the available network bandwidth when the ISU 128 is in leased mode 3 64 kbps 5 128 kbps SS60 SPID1 LOC Primary SPID location SS61 SPID2 LOC Secondary SPID string location SS62 LDN1 LOC Primary local directory number string location SS63 LDN2 LOC Secondary local directory number string location S70 DTE MODE Selects asynchronous or syn...

Page 129: ...trols DCE 3 Hardware flow RTS and CTS flow control 12 Software flow XON OFF controls DTE and DCE S76 DTE CLOCK Selects DTE connector transmit clock timing source 0 Internal ISU 128 supplies timing 1 External DTE supplies timing The following are the string locations for stored numbers 0 9 SS80 SN0 LOC Stored number 0 string SS81 SN1 LOC Stored number 1 string SS82 SN2 LOC Stored number 2 string SS...

Page 130: ... Ground 8 CD O Carrier Detect 9 NC N A No Connection 10 NC N A No Connection 11 NC N A No Connection 12 NC N A No Connection 13 NC N A No Connection 14 NC N A No Connection 15 TC O Transmit Clock 16 NC N A No Connection 17 RC O Receive Clock 18 NC N A No Connection 19 NC N A No Connection 20 DTR I Data Terminal Ready 21 NC N A No Connection 22 RI O Ring Indicator 23 NC N A No Connection 24 ETC I E...

Page 131: ...Clock return 10 CD B O Carrier Detect return 11 ETC B I External Transmit Clock return 12 TC B O Transmit Clock return 13 CTS B O Clear To Send return 14 TD B I Transmit Data return 15 TC A O Transmit Clock 16 RD B O Receive Data return 17 RC A O Receive Clock 18 NC N A No Connection 19 RTS B I Request To Send return 20 DTR A I Data Terminal Ready 21 NC N A No Connection 22 DSR B O Data Set Ready ...

Page 132: ...it Clock V RC A O Receive Clock W TC B I External Transmit Clock return X RC B O Receive Clock return Y ST A O Send Timing AA ST B O Send Timing return K L NC N A No Connection M N NC N A No Connection BB NC N A No Connection CC NC N A No Connection DD NC N A No Connection EE NC N A No Connection FF NC N A No Connection HH NC N A No Connection JJ NC N A No Connection KK NC N A No Connection LL NC ...

Page 133: ... Abandon Call and Retry 4 CRQ I Call Request 5 PND O Present Next Digit 6 PWI O Power Indication 7 SG I O Signal Ground 13 DSC O Distant Station Connect 14 NB1 I Digit LSB 15 NB2 I Digit bit 2 16 NB4 I Digit bit 3 17 NB8 I Digit bit MSB 22 DLO O Data Line Occupied 8 12 NC N A No Connection 18 21 NC N A No Connection 23 25 NC N A No Connection I Input O Output N A Not Applicable Pin Description 4 R...

Page 134: ...nector Pinouts 61202 029L2 1 ISU 128 User Manual 119 Figure E 5 Maintenance Port Table E F Maintenance Port Pin Name I O Description 2 TD A I Transmitted Data 3 RD A O Received Data PIN 13 PIN 1 PIN 25 PIN 14 FEMALE ...

Page 135: ...Appendix E Connector Pinouts 120 ISU 128 User Manual 61202 029L2 1 ...

Page 136: ...ustomer Premises Equipment CPU Central Processing Unit CRS Call Request using stored number CRN Call Request number in command CTS Clear to Send DCE Data Communications Equipment DIC Disconnect Incoming Call DMS Digital Multiplex Switching DN Directory Number DSR Data Set Ready DTE Data Terminal Equipment EIA Electronic Industries Association EKTS Electronic Key Telephone Service ESS Electronic Sw...

Page 137: ...onal Computer POTS Plain Old Telephone Service PRI Primary Rate Interface PRN Program Stored Number RAM Random Access Memory RLN List Stored Number RTS Ready to Send SPCS Stored Program Controlled Switching System SAP Simple Adtran Protocol SPID Service Profile Identifier SS7 Signalling System 7 TA Terminal Adapter TE Terminal Equipment TEI Terminal Endpoint Identifier USART Universal Synchronous ...

Page 138: ...nternational Telegraph Union ITU which prepares recommendations commonly referred to as international standards to resolve technical telegraph and telephone problems central office CO In telephony the phone company switching facility or center usually a Class 5 end office at which subscribers local loops terminate Handles a specific geographic area identified by the first three digits of the local...

Page 139: ...a 2 wire circuit All long distance circuits are 4 wire Almost all local phone lines and analog phones are 2 wire hub 1 Communications center 2 Major routing station for connecting channels 3 DDS connecting center in band signalling Signalling made up of tones which pass within the voice frequency band and are carried along the same circuit as the talk path being established by the signals Virtuall...

Page 140: ...t to the device being tested and the output of the device is fed directly back to its input looped around and the returning data is checked against that which was sent message The Layer 3 information that is passed between the CPE and SPCS for signalling multiplexing The combining of multiple data channels onto a single transmission medium Any process through which a circuit normally dedicated to ...

Page 141: ...e S Reference point The interface that connects an ISDN terminal TE1 or Terminal Adapter TA to the NT2 reference point as defined in the I 411 Recommendation SPCS Stored Program Controlled Switch A digital switch that supports call control routing and supplementary services provision under software control All ISDN switches are SPCSs synchronous 1 The condition occurring when two events happen in ...

Page 142: ...equipment linked at the EIS 232 RS 449 or V 35 interfaces tandem The connection of networks or circuits in series The connection of the output of one circuit to the input of another T interface T Reference point Performs the same function as the S Interface but uses an NT1 rather than an NT2 twisted pair Two wires twisted around each other to reduce induction interference from one wire to the othe...

Page 143: ...rs better reception but also costs more All local loop circuits those coming from a Class 5 central office to the subscriber s phone system are 2 wire unless a 4 wire circuit is requested U interface A twisted pair subscriber loop that connects the NT1 reference point to the ISDN network as defined in the I 411 Recommendation This interface provides Basic Rate Access with an operating frequency of...

Page 144: ...acket data transfer protocol for the B and D Channels Defines the interface between Data Terminal Equipment DTE and Data Circuit Terminating Equipment DCE for terminals operating in the packet mode and connected to public data networks by dedicated circuits ...

Page 145: ...Glossary 130 ISU 128 User Manual 61202 029L2 1 ...

Page 146: ... 31 using S registers 31 audio 25 auto answer disabled 36 dump all calls 36 enabled 36 B B channel aggregation 84 bit rate 42 BONDING mode 1 7 26 48 C cable lengths 12 call screening 38 call type 24 audio 25 data 56 kbps 25 data 64 kbps 25 default 25 speech 24 25 calling number identifiers 88 Capability B 10 Capability C 10 Capability R 9 10 Capability S 10 carrier detect 88 CD options 43 channel ...

Page 147: ... 64k sync 61 dial 64K 2 7 dial interface connection 12 dial line menu tree 23 operation 23 dial number 68 dial options 29 AT commands 30 disabled 35 front panel 29 RS 366 29 V 25 bis 33 dial ppp 62 dial stored number 68 dialing ways to dial 2 dialing options 67 answer call 68 dial number 68 dial stored number 68 hang up line 68 redial last number 68 store review number 69 dialing selections 83 dis...

Page 148: ... 77 if the ISU 128 does not read ready 77 installation 11 interoperability 84 ISDN basic rate service 11 basic rate service defined 2 ordering codes 9 Capability B 10 Capability C 10 Capability R 9 10 Capability S 10 Generic Data I 9 overview 1 switch protocol options 90 U interface operational mode op tions 90 ISU 128 front panel 3 interoperability 4 overview 1 rear panel 2 specifications and fea...

Page 149: ...rotocols recommended 6 7 operation 15 ordering ISDN with IOCs 9 P password remote configuration 74 physical specifications 85 point to point protocol 56 power supply 85 PPP with compression 57 ppp 7 ppp async to sync 56 protocol options 47 BONDING mode 1 7 48 clear channel 7 48 DSU 57 6 async 53 fallback 54 multilink ppp 56 ppp 7 56 ppp async sync 56 SAP 7 53 T link 7 53 V 110 7 51 V 120 7 50 V 34...

Page 150: ...word 74 VT 100 screen 75 Simple ADTRAN Protocol SAP 53 software version 22 specifications 83 speech 24 SPID obtaining 25 setting 25 SPID access options 90 S registers 107 status buffer 16 messages 97 status menu 17 store review number 69 stored numbers 89 switch compatibility 84 switch protocol 24 synchronous data format transmit clock 45 T TANULL 50 TCID 50 terminal identification 25 test menu 19...

Page 151: ...aling 35 V 25 bis 33 menu tree 33 V 25 async dialing 34 V 34 51 compression block size options 91 compression options 91 operational mode options 91 V 35 12 interface 117 V34 115 2 async 63 videoconferencing 12 VT 100 configuration screen 18 set password screen 75 VT 100 terminal configuration screen 18 24 dial options screen 67 status screen 17 test screen 19 ...

Page 152: ...termines that a repair is needed Technical Support will coordinate with the Return Material Authorization RMA de partment to issue an RMA number For information regarding equipment currently in house or possible fees associated with repair contact RMA direct ly at the following number Identify the RMA number clearly on the package below address and return to the following address ADTRAN Inc RMA De...

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