ADTRAN ISU 512 - Manuals
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Manual ADTRAN ISU 512
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Trademark: 5ESS is a registered trademark of AT&TDMS-100 is a trademark of Northern Telecom, Inc.ISU is a trademark of ADTRAN, Inc. 901 Explorer Boulevard P.O. Box 140000 Huntsville, AL 35814-4000 Phone: (205) 963-8000 © 1997 ADTRAN, Inc. All rights reserved. Printed in USA.
CANADIAN EMISSIONS REQUIREMENTS 1202086L1 This digital apparatus does not exceed the Class B limits for radio noise emissions from digital apparatus as set out in the interference-causing equipment standard entitled "Digital Apparatus," ICES-003 of the Department of Communications. Cet appar...
CANADIAN EQUIPMENT LIMITATIONS Notice: The Canadian Industry and Science Canada label identifies certified equip- ment. This certification means that the equipment meets certain telecommunications network protective, operational, and safety requirements. The Department does not guarantee the equipme...
Quick Start Guide Before configuring the ISU TM 512, the telephone service provider must supply the switch type, service profile identifier (SPID), and local directory number (LDN). For example, for one ISDN BRI 2B+D line: Switch Type National ISDN-1 SPID1 20455512120100 SPID2 20455512130100 LDN1 55...
Press Cancel to exit to the status screen and verify Ready conditions for each BRI line configured. If the status screen reads SYNC , DOWN , TEI , or SPID, either the configuration of the switch type and SPIDs are incorrect or there may be a problem with the ISDN line or translations; see the chapte...
61202.086L1-1 ISU 512 User Manual i Table of Contents Chapter 1. Understanding ISDN and the ISU 512 ..................................................... 1 ISDN Overview .................................................................................................................. 1 Product Overv...
61202.086L1-1 ISU 512 User Manual v List of Figures Figure 1-1: ISU 512 Rear Panel ..................................................................................... 2Figure 1-2: ISU 512 (U interface) Applications .......................................................... 4Figure 3-1: Maintenance...
61202.086L1-1 ISU 512 User Manual vii List of Tables Table 1-A: ISU 512 Synchronous Rates ...................................................................... 5 Table C-A: AT Commands ............................................................................................ 85Table D-A: Pinouts ...
61202.086L1-1 ISU 512 User Manual 1 Chapter 1 Understanding ISDN and the ISU 512 ISDN OVERVIEW The Integrated Services Digital Network (ISDN) is a public or private switched digital network. ISDN is an international standard for digital communica-tions, allowing a full range of enhanced services sup...
Chapter 1: Understanding ISDN and the ISU 512 2 ISU 512 User Manual 61202.086L1-1 The ISU 512 transmits data over an RS-530 or V.35 interface, selectable from the front panel. The ISU 512 performs at synchronous data transfer rates of 56 kbps to 512 kbps. At rates over 64 kbps, the BONDING Mode 1 in...
Chapter 1: Understanding ISDN and the ISU 512 61202.086L1-1 ISU 512 User Manual 3 Dialing from the ISU 512 is accomplished in a variety of ways: • Manually from the front panel keypad. • Manually from up to ten stored numbers. • Automatically through an RS-366 dialing port used in video conferencing...
Chapter 1: Understanding ISDN and the ISU 512 4 ISU 512 User Manual 61202.086L1-1 ISU 512 INTEROPERABILITY Telephone networks are evolving from analog technologies to digital technol-ogies such as ISDN. This transition is time-consuming and costly for tele-phone companies and upgrading all locations...
Chapter 1: Understanding ISDN and the ISU 512 61202.086L1-1 ISU 512 User Manual 5 RECOMMENDED OPERATING PROTOCOLS The ISU 512 supports BONDING Mode 1. For applications such as videocon-ferencing, in which the unit needs to interoperate with two SW56 lines or one dual-port ISDN device, the 2 x clear ...
61202.086L1-1 ISU 512 User Manual 7 Chapter 2 Ordering ISDN ISDN is a complex service with many network options. Obtaining service from the local telephone company and long distance providers can be compli-cated. The following instructions only apply to North American switches. In North America, the...
Chapter 2: Ordering ISDN 8 ISU 512 User Manual 61202.086L1-1 For more information regarding ordering ISDN, see the ADTRAN document Ordering ISDN Service User Guide part number 60000.015-8, or contact the tele- phone company for alternative line configurations. The Ordering ISDN Service User Guide is...
61202.086L1-1 ISU 512 User Manual 9 Chapter 3 Installation INSTALLATION After unpacking the unit, immediately inspect it for possible shipping dam-age. If damage is discovered, file a claim immediately with the shipping car-rier, then contact ADTRAN Customer Service; see the inside back cover of thi...
Chapter 3: Installation 10 ISU 512 User Manual 61202.086L1-1 DTE DATA CONNECTION Data terminal equipment (DTE) is connected to the ISU 512 by using the V.35 interface, and/or the RS-530 interface on the rear panel of the ISU 512. The maximum cable lengths recommended are 50 feet for the RS-530 inter...
Chapter 3: Installation 61202.086L1-1 ISU 512 User Manual 11 Where #R changes the Channel Rate (number of ISDN B channels) as follows: 0 = (2x56k and 2x64k) 2 x Clear Channel Protocol1 = 1 B Channel (1x56k, 1x64k) BONDING Mode 12 = 2 B Channels (2x56k, 2x64k) BONDING Mode 13 = 3 B Channels (3x56k, 3...
Chapter 3: Installation 12 ISU 512 User Manual 61202.086L1-1 THE MAINTENANCE INTERFACE The Maintenance Interface is available at 9600 bps, 8 data bits, no parity, through the CHAIN IN port. See the appendix Pinouts for the Chain In port pinout. The VT 100 terminal or null modem can be connected to t...
Chapter 3: Installation 61202.086L1-1 ISU 512 User Manual 13 Software Update There are two methods available for updating ISU 512 software. The local method involves using the Chain In port and is described in this section. The remote method involves transmitting smart dial strings over a dial-up co...
Chapter 3: Installation 14 ISU 512 User Manual 61202.086L1-1 VT 100 MENU INTERFACE The VT 100 menu interface can be used by connecting a VT 100 compatible ter-minal to the Chain In port on the back of the ISU 512. The VT 100 terminal (or PC running terminal emulation software) is connected to the Ch...
Chapter 3: Installation 61202.086L1-1 ISU 512 User Manual 15 Figure 3-2 VT 100 Configuration Menu Figure 3-3 VT 100 Configuration Menu 2
61202.086L1-1 ISU 512 User Manual 19 Chapter 4 Operation INITIAL SELF TEST The ISU 512 performs an initial self test upon initial installation. Once the self test is successfully completed, the current status mode is displayed. If the ISU 512 is not connected to the network, the Status menu displays...
Chapter 4: Operation 20 ISU 512 User Manual 61202.086L1-1 MENU STRUCTURE The ISU 512 uses a multilevel menu approach to access its many features. All menu operations are displayed in the LCD window or are available from the VT 100 terminal interface. The opening menu is the access point to all other...
Chapter 4: Operation 61202.086L1-1 ISU 512 User Manual 21 Configuration (CONFIG) Menu Configuration selects network and DTE operating parameters. Dial Menu Dial provides manual dialing functions. Key in a number to dial or select one of the ten stored numbers. Basic Menu Traversal Four function keys...
Chapter 4: Operation 22 ISU 512 User Manual 61202.086L1-1 3. Choose an item on the submenu such asNetwork Options (Netw. options) by pressing the corresponding number followed by Enter . 4. To select Dial Line options, press 1 , then press Enter . The menu path follows: 3=CONFIG 1=Netw. options 1=Di...
61202.086L1-1 ISU 512 User Manual 25 Chapter 5 Configuration USING ISDN BASIC RATE SWITCHED SERVICE This section explains how to configure the ISU 512 when using ISDN Basic Rate switched service. Figure 5-1 illustrates the entire Configuration branch of the menu tree.
Chapter 5: Configuration 26 ISU 512 User Manual 61202.086L1-1 Figure 5-1 Configuration Menu <Use Up and Down keys to select LDN 1 to 8> <Use Up and Down keys to select SPID 1 to 8> 2=DTE options 1=Netw. options 3=CONFIG 3=Bonding Setup 4=Quick setup 1=Dial 512K2=Dial 384K3=Dial 448K4=Dia...
Chapter 5: Configuration 61202.086L1-1 ISU 512 User Manual 27 CONFIGURING NETWORK OPTIONS FOR DIAL OPERATION This section describes how to configure the ISU 512 for Dial operation such as Switch type, Call type, Terminal ID, Dial options, and Auto answer. To dial calls over ISDN, the ISU 512 must be...
Chapter 5: Configuration 28 ISU 512 User Manual 61202.086L1-1 Speech Speech directs the call control software to request a Mu-law/A-law speech cir-cuit as the bearer capability for outgoing calls. The Speech option is used with an ISDN line configured for voice service. In some areas voice service c...
Chapter 5: Configuration 61202.086L1-1 ISU 512 User Manual 29 Terminal Identification Terminal identification is assigned by the local telephone company.Use the following menu path to set the terminal identification. 3=CONFIG 1=Netw. options 1=Dial Line 3=Terminal ID 1=Set SPID 2=Set LDN Setting the...
Chapter 5: Configuration 30 ISU 512 User Manual 61202.086L1-1 Setting the LDN The local directory number (LDN) is used when placing or receiving BOND-ING calls. The LDN is the local phone number assigned to the line. This option allows the entry of up to eight LDNs. Use the Up and Down arrows to sel...
Chapter 5: Configuration 61202.086L1-1 ISU 512 User Manual 31 Figure 5-2 Dial Options Menu Front Panel To establish and disconnect calls using the front panel, configure Dial options for Front Panel . See the section Front Panel for more details. RS-366 To establish and disconnect calls using the RS...
Chapter 5: Configuration 32 ISU 512 User Manual 61202.086L1-1 5 sec or EON (default) The ISU 512 assumes the dial string is fully entered if more than 5 seconds elapse since input of the last digit, or an EON command is received. This is the factory default setting. 10 sec or EON The ISU 512 assumes...
Chapter 5: Configuration 61202.086L1-1 ISU 512 User Manual 33 Auto Answer The ISU 512 can be configured to automatically answer or not answer. Use the following menu path: 3=CONFIG 1=Netw. options 1=Dial Line 5=Auto answer 1=Disabled 2=Enabled (default) 3=Dump all calls Disabled When Disabled is sel...
Chapter 5: Configuration 34 ISU 512 User Manual 61202.086L1-1 Connect Timeout The Connect Timout option sets the length of time that the ISU 512 waits for a far-end unit to answer an outgoing call. Use the following menu path: 3=CONFIG 1=Netw. options 1=Dial Line 6=Connect Timout 1=15 sec 2=30 sec (...
Chapter 5: Configuration 61202.086L1-1 ISU 512 User Manual 35 3. Place a call to the ISU 512 with the stored number to see if it answers. 4. If the ISU 512 does not answer the call, look at the Call ID message in the Status buffer. More than likely, the Call ID number is a ten-digit number 5. Store ...
Chapter 5: Configuration 36 ISU 512 User Manual 61202.086L1-1 Remote Supervision The ISU 512 has the ability to be remotely accessed and configured from an-other ISU 512. The originating ISU 512 can remotely access another ISU 512 using a smart dial string with a #6 suffix. The ISU 512 can be protec...
Chapter 5: Configuration 61202.086L1-1 ISU 512 User Manual 37 Maintenance Setup There are three Maintenance Setup options: Auto Traps, ADLP Address, and Port Mode. Auto Traps Auto Traps is for use with Port Mode=ATEL. The ISU 512 monitors and re- ports alarms for network failures or degrading perfor...
Chapter 5: Configuration 38 ISU 512 User Manual 61202.086L1-1 Call NumID When Call NumID is enabled, the ISU 512 will send the caller ID INFO setup message to the ISDN switch. When Call NumID is disabled, the caller ID INFO setup message will not be sent to the ISDN switch.
Chapter 5: Configuration 61202.086L1-1 ISU 512 User Manual 39 CONFIGURING THE ISU 512 FOR LEASED DIGITAL SERVICE This section explains how to configure the ISU 512 when using a 2B1Q Leased Digital service or a service that provides a permanent connection between end points. This mode is only support...
Chapter 5: Configuration 40 ISU 512 User Manual 61202.086L1-1 Figure 5-4 Limited Distance Modem Application If two ISU 512 units are connected through channel banks, one unit should be configured for Slave mode and the other for Slave (Master) ; see Figure 5-5. To easily configure ISU 512s for this ...
Chapter 5: Configuration 61202.086L1-1 ISU 512 User Manual 41 Test Remote When the Test Remote option is enabled the unit performs an automatic 2047 BERT of the line(s) immediately following BONDING connection. When dis-abled (default), no test is performed after initialization. Maintenance Setup Th...
Chapter 5: Configuration 42 ISU 512 User Manual 61202.086L1-1 SETTING DTE OPTIONS The DTE Options menu is used to select the configuration parameters that con-trol the operation of the DTE interface ports of the ISU 512, such as the maxi-mum bit rate and the connector type. Changes to the DTE option...
Chapter 5: Configuration 61202.086L1-1 ISU 512 User Manual 43 Connector Type Specify the interface by selecting the desired connector type. Use the follow-ing menu path to select the connector type. 3=CONFIG 2=DTE options 2=Connector Type 1=RS-530 2=V.35 (default) RS-530 to V.35 Cable The RS-530 to ...
Chapter 5: Configuration 44 ISU 512 User Manual 61202.086L1-1 CTS Options Selecting Forced CTS causes the CTS signal on the DTE connector to be con- tinually asserted. Follow RTS causes the CTS signal to follow the state of the RTS lead. Follow CD causes the CTS signal to follow the state of the CD ...
Chapter 5: Configuration 61202.086L1-1 ISU 512 User Manual 45 3=CONFIG 2=DTE options 7=DTR Options 1=Ignore DTR (default) 2=Idle when Off 3=Off>On dial #0 4=Dial #0 if On 5=Answer if On To store a number for automatic dialing see Dialing Options. Selecting Dial #0 if On allows calls to be automat...
Chapter 5: Configuration 46 ISU 512 User Manual 61202.086L1-1 BONDING SETUP The ISU 512 communicates with many different types of telecommunication equipment including other ISU 512s, ISDN terminal adapters, Switched 56 DSUs, and BONDING mode 1-compatible inverse multiplexers. The ISU 512 supports t...
Chapter 5: Configuration 61202.086L1-1 ISU 512 User Manual 47 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 failed. This timer value should be left at the factory default setting...
Chapter 5: Configuration 48 ISU 512 User Manual 61202.086L1-1 TCID This option specifies the length of time both endpoints attempt to negotiate an agreeable value for bearer channels and channel capacities before deciding the BONDING call has failed. This timer default setting is 5 seconds. Values o...
Chapter 5: Configuration 61202.086L1-1 ISU 512 User Manual 49 TRANSPARENT 2 X CLEAR CHANNEL PROTOCOL Due to the large number of existing videoconferencing circuits that utilize dual-port terminal adapters or two SW56 DSU/CSU units, the ISU 512 has been designed to operate with these existing circuit...
Chapter 5: Configuration 50 ISU 512 User Manual 61202.086L1-1 Videoconferencing equipment should be set for delayed second call dialing when using the RS-366 Y cable for dialing 2-clear channel calls. QUICK SETUP CONFIGURATION To configure the DTE Options quickly and easily, the Quick Setup menu is ...
Chapter 5: Configuration 52 ISU 512 User Manual 61202.086L1-1 Maximum bit rate 336 kbps DTR Options Ignore RS-530-V35 cable Disabled RS366-Y cable Disabled Video 384K When the ISU 512 is configured for Video 384K the following parameters are automatically preset: Service type ISDN dial line Automati...
Chapter 5: Configuration 61202.086L1-1 ISU 512 User Manual 53 Maximum bit rate 512 kbps data DTR options Ignore Clock mode Master Channel rate 64K Bearer RS-530-V35 cable Disabled RS-366-Y cable Disabled Leased Slave and Ldm SlvMstr When the ISU 512 is configured for Leased Slave or Ldm SlvMstr (lim...
Chapter 5: Configuration 61202.086L1-1 ISU 512 User Manual 55 Store/Review Number Enter and review stored numbers. Press the Up and Down arrow keys to scroll through the 10 stored numbers (SN0 - SN9). To store a number, scroll in the desired stored number location, enter the number, and press Enter ...
Chapter 5: Configuration 56 ISU 512 User Manual 61202.086L1-1 CONFIGURING THE ISU 512 FOR V.25 BIS IN-BAND DIALING V.25 bis dialing is used primarily by data terminal equipment with synchro-nous interfaces (HDLC/SDLC or BSC/BISYNC) not supporting the AT com-mand set, which is commonly used by asynch...
61202.086L1-1 ISU 512 User Manual 57 Chapter 6 Testing TEST OPTIONS Selecting 2=TEST from the Main menu tree displays available local testing op- tions. Use the following menu path to select test options: 2=Test 1=Loopback DTE 2=Loopback Proto 3=2047 Checker 4=NEBE/FEBE 5=Software Ver Loopback DTE C...
Chapter 6: Testing 58 ISU 512 User Manual 61202.086L1-1 2047 Checker The ISU 512 has the ability to loopback the remote unit and generate/check 2047 BERT pattern through the BONDING protocol. This allows 2047 BERT patterns to be run on multiple ISDN connections (through BONDING). The originating ISU...
Chapter 6: Testing 61202.086L1-1 ISU 512 User Manual 59 Near-End Block Errors/Far-End Block Errors (NEBE/FEBE) Allows the user to monitor the quality of the local loop by viewing the number of near-end block errors (NEBE) and far-end block errors (FEBE) occurring on the ISDN U-interface. An incremen...
61202.086L1-1 ISU 512 User Manual 61 Chapter 7 Troubleshooting IF SELF TEST FAILS When the ISU 512 powers up, it performs an internal self test. This takes ap-proximately 10 seconds. At the end of the test, the front panel displays Self Test Passed . If Self Test Passed is not displayed, perform the...
Chapter 7: Troubleshooting 61202.086L1-1 ISU 512 User Manual 63 F. Ensure nothing else is bridged across the ISDN line pair. G. With a minimum of extra wiring, try connecting to the line pair at the point where service provider's wiring ends. H. With the ISU 512 connected to the ISDN line and powere...
Chapter 7: Troubleshooting 64 ISU 512 User Manual 61202.086L1-1 3. Connect another piece of functioning ISDN equipment to the ISDN line. 4. With the ISU 512 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 app...
Chapter 7: Troubleshooting 66 ISU 512 User Manual 61202.086L1-1 • The ISU 512 software setup • The software setup of the telephone service provider To isolate the problem, perform the following procedure. 1. Ensure the ISU 512 is set up with the correct SPID and LDN by selecting CONFIG , Netw. optio...
61202.086L1-1 ISU 512 User Manual 67 Chapter 8 Specifications Summary SPECIFICATIONS AND FEATURES This section describes the standard specifications and features incorporated in the ISU 512. Network Interface Four RJ-45s for ISDN Basic Rate Interface DTE Interface RS-530 or V.35 (both connectors pre...
Chapter 8: Specifications Summary 68 ISU 512 User Manual 61202.086L1-1 D Channel Switch Compatibility • AT&T 5ESS • NTI DMS-100 • National ISDN-1 • EuroISDN (only available on the ISU 512 ST) B Channel Aggregation BONDING protocol Mode 1 Display Two-line x 16-character LCD Environmental • Operat...
61202.086L1-1 ISU 512 User Manual 69 Appendix A Status Buffer Messages STATUS LINE MESSAGES Messages in all caps are generated by the ISDN network. Messages with lower case letters are generated by the ISU 512. Call Connect B1 Bearer channel 1 connected and is currently active. Call Connect B2 Beare...
Appendix A. Status Buffer Messages 72 ISU 512 User Manual 61202.086L1-1 CallID 2 in use ISU 512 tried to place a call using SPID 2 though SPID 2 was already in use. Call not ringing User executed an answer command (A) but there was not a call present. CALL_REJECTED The call has been rejected by the ...
Appendix A. Status Buffer Messages 61202.086L1-1 ISU 512 User Manual 73 DPUMP END RCVD Indication of a hang-up or disconnect occurring during BONDING. Does not indicate an ERROR condition has occurred. DTE not set V25 The DTE equipment is not optioned for the same bit rate as the ISU 512 for V.25 bi...
Appendix A. Status Buffer Messages 74 ISU 512 User Manual 61202.086L1-1 INCOMING_CALL_BA Incoming call barred. The network will not allow an incoming call. INCOMPATIBLE_DEST The called number cannot accept the type of call that has been placed. INTRWORKING _UNS A message was sent by a far-end networ...
Appendix A. Status Buffer Messages 61202.086L1-1 ISU 512 User Manual 75 MANDATORY_IE_MIS Mandatory information element missing. Need 64K call The BONDING protocol requires the ISU 512 to be configured for a 64k data call type. Negotiation fail The BONDING negotiation has failed. NETWORK BUSY The ISD...
Appendix A. Status Buffer Messages 76 ISU 512 User Manual 61202.086L1-1 NORMAL_CLEARING The network is disconnecting the current call. NOT end2end ISDN The path that the call was routed over is not ISDN from end-to-end (warning only). NUMBER_CHANGED The number dialed has been changed. OUTGOING_CALL_...
Appendix A. Status Buffer Messages 61202.086L1-1 ISU 512 User Manual 77 TANULL expired Bonding timer TANULL expired; non BONDING equipment attempted to call into the ISU 512 while optioned for BONDING. TEMPORARY_FAILURE The network has temporarily failed; try the call again. TIMER_EXPIRY Call contro...
61202.086L1-1 ISU 512 User Manual 79 Appendix B S-Register List S0 . . . . . AUTO ANSWER . . . . . . Determines how the ISU 512 answers an incoming call. 0=Disable (ISU 512 does not answer call) 1=Enable (ISU 512 answers all calls) (default)2=Dump all calls S7 . . . . . CONNECT TIME . . . . . . Dete...
Appenidix B. S-Register List 82 ISU 512 User Manual 61202.086L1-1 S55 . . . .DIAL MODE . . . . . . . . . . Selects dialing interface. 0=Front panel only (dialing from front panel is always available) (default) 1=RS-366 dialing port3=V.25 bis dialing S58 . . . .CALL SCREENING . . . . Allows the ISU 5...
Appenidix B. S-Register List 61202.086L1-1 ISU 512 User Manual 83 The following are the string locations for stored numbers 0 - 9: SS90 . . . SN0 LOC . . . . . . . . . . . . Stored number 0 stringSS91 . . . SN1 LOC . . . . . . . . . . . . Stored number 1 stringSS92 . . . SN2 LOC . . . . . . . . . . ...
61202.086L1-1 ISU 512 User Manual 85 Appendix C AT Commands The AT commands (shown in Table C-A) can be used with the Maintenance interface available at 9600 bps (8, n, 1) through the CHAIN IN port on the back panel. See the section The Maintenance Interface in Chapter 3 for more informa-tion. Comma...
Appendix C. AT Commands 86 ISU 512 User Manual 61202.086L1-1 Data Terminal Ready (DTR) Control Line Options &D0 - DTR ignored &D1 - DTR Off forces command &D2 - DTR Off forces idle (on allows auto answer) Generic Unit Configurations &F0 - Reset all S-registers &F1 - Dial 512K &am...
61202.086L1-1 ISU 512 User Manual 89 Appendix D Pinouts Figure D-1 illustrates the EIA-232 to DB-25 adapter connector. Figures D-2 through D-4 show the interfaces for the pinouts identified in Tables D-A through D-F. Figure D-1 EIA-232 to DB-25 Adapter Connector Figure D-2 RJ-45 ISDN Line Interface ...
Appendix D. Pinouts 90 ISU 512 User Manual 61202.086L1-1 Table D-B Pinouts for IFC RJ-45 Connectors Figure D-3 EIA-232, RS-366, and RS-530 Connector Figure D-4 V.35 Connector I F C R J - 4 5 C o n n e c t o r Pin 4 Ring Pin 5 T i p PIN 13 PIN 1 PIN 25 PIN 14 FEMALE V .35 A B C D E F J L R V Z DD JJ ...
Appendix D. Pinouts 61202.086L1-1 ISU 512 User Manual 91 Table D-C RS-366 Dialing Port Pinouts See Figure D-3. P i n N a m e I n p u t / O u t p u t D e s c r i p t i o n s 1 Shield I / O Shield for Cable 2 DPR I Digit Present 3 ACR O Abandon Call and Retry 4 CRQ I Call Request 5 PND O Present Next ...
61202.086L1-1 ISU 512 User Manual 97 Acronyms AMI ........................... Alternate Mark Inversion ANI ........................... Automatic Number Identification BONDING ............... Bandwidth On Demand Interoperability Group BRI ............................ Basic Rate Interface CCITT .........
61202.086L1-1 ISU 512 User Manual 99 Glossary 2 B+D The basic rate interface (BRI) in ISDN. A single ISDN circuit divided into two 64 kbps digital channels for voice or data and one 16 kbps channel for low speed data (up to 9,600 baud) and signaling. 2B+D is carried on one or two pairs of wires de- ...
Glossary 61202.086L1-1 ISU 512 User Manual 101 DDS Dataphone digital service. AT&T private line service for transmitting data over a digital system. The digital transmission system transmits electrical signals direct- ly, instead of translating the signals into tone of varied frequencies as with...
Glossary 102 ISU 512 User Manual 61202.086L1-1 interface A common boundary between two systems over which the inter-system commu- nication occurs. ISDN Integrated services digital network. A network architecture that enables end-to- end digital connections. The network supports diverse services thro...
Glossary 61202.086L1-1 ISU 512 User Manual 103 by multiple users. Typically, user data streams are interleaved on a bit or byte ba- sis (time division) or separated by different carrier frequencies (frequency divi- sion). multipoint circuit A circuit consisting of three or more stations connected di...
Glossary 104 ISU 512 User Manual 61202.086L1-1 S interface S reference point The interface that connects an ISDN terminal (TEI) or terminal adapter (TA) to the NT2 reference point as defined in the I.411 Recommendation. synchronous 1. The condition occurring when two events happen in a specific time...
Glossary 61202.086L1-1 ISU 512 User Manual 105 V.35 CCITT standard for trunk interface between a network access device and a packet net- work that defines signaling for data rates greater than 19.2 kbps. videoconferencing The real-time, usually two-way, transmission of digitized video images between...
61202.086L1-1 ISU 512 107 Index Numerics 1 sec or EON 31 10 sec or EON 32 2 sec or EON 31 2 x clear channel protocol 5, 49 20 sec or EON 32 2047 checker 58 5 sec or EON 32 A adapter EIA-232 to DB-25 89 ADLP address 37, 41 answer call 54 arrow keys 20, 23 AT commands 85 audio 28 auto answer 33 menu p...
Product Support Information Presales Inquiries and Applications Support Please contact your local distributor, ADTRAN Applications Engineering, or ADTRAN Sales: Post-Sale Support Please contact your local distributor first. If your local distributor cannot help, please contact ADTRAN Technical Suppo...
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