3COM CORPORATION IMPACT (3C871, 3C876) Card Type ISDN TA I/O Options Analog adapter (optional) Chipset Unidentified Error Correction/Compression STAC ISDN Transfer Rate 56Kbps x 2/64Kbps x 2 ISDN Protocol V.120, PPP Switch Type 5ESS, DMS100, EWSD, NI-1 Data Bus Serial [Image] CONNECTIONS Function Label Function Label ISDN interface CN1 Serial port CN4 Analog adapter CN2 AC power in CN5 Serial port CN3 Power switch SW1 Note: CN2 may not be present on all models. DIAGNOSTIC LED(S) LED Color Status Condition B2 Green On Data call connected on B2 channel B2 Yellow On Voice call connected on B2 channel B2 Green Blinking TA is dialing data call on B2 channel B2 Yellow Blinking TA is dialing voice call on B2 channel B2 N/A Off B2 channel is not connected B1 Green On Data call connected on B1 channel B1 Yellow On Voice call connected on B1 channel B1 Green Blinking TA is dialing data call on B1 channel B1 Yellow Blinking TA is dialing voice call on B1 channel B1 N/A Off B1 channel is not connected DIAGNOSTIC LED(S) (CON'T) LED Color Status Condition D Yellow On Signal is not synchronized or ISDN is not connected D Yellow Blinking Signal is synchronized but D-channel protocols not established D Yellow Off Signal is synchronized TEST Yellow On TA failed last test TEST Yellow Blinking TA is executing test TEST Yellow Off TA is not executing test POWER Yellow On Power is on POWER Yellow Off Power is off SUPPORTED STANDARD COMMANDS Basic AT Commands +++, A/ A, D, E, H, O, V, Z &D, &F, &W Extended AT Commands \Q, \T S-Registers S0 Note: See MHI help file for complete information. Proprietary AT Command Set CALL TYPE Type: Register Format: AT [cmds] S61=n [cmds] Description: Selects the type of call the ISDN will make. This register has no function on these models. Command Function S61=0 TA will dial according to dial modifiers. S61=2 TA will place ISDN call. CALLER ID - DATA Type: Register (read-only) Format: AT [cmds] S66? [cmds] Description: Displays the Caller ID information for data calls. CALLER ID - VOICE Type: Register (read-only) Format: AT [cmds] S65? [cmds] Description: Displays the Caller ID information for voice calls. DCD SIGNAL Type: Configuration Format: AT [cmds] &Cn [cmds] Description: Controls the behaviour of the DCD signal. Command Function &C0 DCD forced high. &C1 DCD forced high after carrier signal is detected. &C2 DCD forced high except at disconnect. DISPLAY FIRMWARE REViSION Type: Immediate Format: AT [cmds] %V [cmds] Description: Displays the TA's firmware revision. DISPLAY INFORMATION Type: Immediate Format: AT [cmds] In [cmds] Description: Displays information requested about the TA. Command Function I0 Displays product identification code. I1 Displays ROM checksum. I4 Displays numeric product identification code, precomputed checksum value, firmware revision, model name, interface type, country code, and data pump model. DISPLAY MODIFIED COMMANDS Type: Immediate Format: AT [cmds] \S [cmds] Description: Displays the settings of all commands that have been modified. DISPLAY REGISTERS Type: Immediate Format: AT [cmds] %R [cmds] Description: Displays the settings of all status registers. DYNAMIC BANDWIDTH ALLOCATION Type: Register Format: AT [cmds] S70=n [cmds] Description: Selects whether dynamic bandwidth allocation will be used to allow simultaneous data and voice calls. Command Function S70=0 Dynamic bandwidth allocation disabled. S70=1 Dynamic bandwidth allocation enabled. ENDPOINT DISCRIMINATOR Type: Register Format: AT [cmds] S83=nnnn [cmds] Description: Sets the endpoint discriminator address for multipoint PPP systems. Up to twenty numbers may be specified. ENDPOINT DISCRIMINATOR CLASS Type: Configuration Format: AT [cmds] S82=n [cmds] Description: Sets the endpoint discriminator class for multipoint PPP systems. Command Function S82=1 User-defined address. S82=2 IP address. S82=3 802.1 MAC address. S82=4 PPP magic number block. S82=5 Public Switched Network Directory number. LINE SPEED Type: Register Format: AT [cmds] S60=n [cmds] Description: Selects the line speed that the TA will attempt to connect at. Command Function S60=56 TA will attempt to connect at 56Kbps. S60=64 TA will attempt to connect at 64Kbps. LOCAL SERIAL PORT SPEED Type: Configuration Format: AT [cmds] $Bn [cmds] Description: Sets the speed that the TA will communicate with the DTE. Command Function $B0 Auto-detects current serial port speed. $B1200 Sets the serial port to 1200bps. $B2400 Sets the serial port to 2400bps. $B4800 Sets the serial port to 4800bps. $B9600 Sets the serial port to 9600bps. $B19200 Sets the serial port to 19.2Kbps. $B38400 Sets the serial port to 38.4Kbps. $B57600 Sets the serial port to 57.6Kbps. $B115200 Sets the serial port to 115.2Kbps. MULTILINK PPP Type: Register Format: AT [cmds] S80=n [cmds] Description: Selects whether the TA will use Multilink PPP. Command Function S80=0 Multilink PPP disabled. S80=1 Multilink PPP enabled. MULTILINK PPP - SECOND PHONE NUMBER Type: Register Format: AT [cmds] S81=<#> [cmds] Description: Sets the second phone number to be dialed when attempting to connect with multilink PPP. If this register is left blank then the number given with the D command will also be dialed for the second number. PHONE NUMBER 1 Type: Register Format: AT [cmds] S51=<#> [cmds] Description: Sets the TA’s first phone number. PHONE NUMBER 2 Type: Register Format: AT [cmds] S53=<#> [cmds] Description: Sets the TA’s second phone number. PROTOCOL - B-CHANNEL Type: Register Format: AT [cmds] S71=n [cmds] Description: Selects the protocol the TA will use on the B channels. Command Function S71=0 Auto-select common protocol. S71=1 TA will use PPP conversion. S71=2 TA will use V.120. RESULT CODES Type: Configuration Format: AT [cmds] Qn [cmds] Description: Enables modem to send result codes to the DTE. Command Function Q0 Result code sending enabled. Q1 Result code sending disabled. Q2 Result code sending enabled on originate mode only. SERVICE PROFILE IDENTIFIER 1 Type: Register Format: AT [cmds] S52=<#> [cmds] Description: Sets the TA’s first SPID. SERVICE PROFILE IDENTIFIER 2 Type: Register Format: AT [cmds] S54=<#> [cmds] Description: Sets the TA’s second SPID. SWITCH TYPE Type: Register Format: AT [cmds] S50=n [cmds] Description: Selects the type of IDSN switch the TA is connected to. Command Function 1 AT&T 5ESS custom switch type. 3 NI-1/AT&T 5ESS switch type. 6 NI-1/National Telecom NI-1 or Siemens EWSD switch type. TERMINAL ENDPOINT IDENTIFIER 1 Type: Register (read-only) Format: AT [cmds] S55? [cmds] Description: Displays the first TEI assigned by the ISDN switch. A value of 255 indicated that the switch did not assign a TEI. TERMINAL ENDPOINT IDENTIFIER 1 STATUS Type: Register (read-only) Format: AT [cmds] S57? [cmds] Description: Returns a value indicating the status of the first TEI. Value Meaning 0 TA has not attempted to initialize with SPID 1. 1 TA succeeded in initializing with SPID 1. 2 TA failed in initializing with SPID 1. TERMINAL ENDPOINT IDENTIFIER 2 Type: Register (read-only) Format: AT [cmds] S56? [cmds] Description: Displays the second TEI assigned by the ISDN switch. A value of 255 indicated that the switch did not assign a TEI. TERMINAL ENDPOINT IDENTIFIER 2 STATUS Type: Register (read-only) Format: AT [cmds] S58? [cmds] Description: Returns a value indicating the status of the second TEI. Value Meaning 0 TA has not attempted to initialize with SPID 2. 1 TA succeeded in initializing with SPID 2. 2 TA failed in initializing with SPID 2. U INTERFACE STATUS Type: Register (read-only) Format: AT [cmds] S59? [cmds] Description: Returns a value indicating the status of the U interface. Command Function 0 U interface is not synchronized. 1 U interface is synchronized. V.120 FRAME TYPE Type: Register Format: AT [cmds] S73=n [cmds] Description: Selects the frame type that the TA will use when in V.120 mode. Command Function S73=0 TA will use I frames. S73=1 TA will use UI frames. V.120 MAXIMUM FRAME SIZE Type: Register Format: AT [cmds] S74=n [cmds] Default: 256 Range: 240 - 256 Unit: 1 byte Description: Selects the maximum frame size used for V.120 mode. Note: Adtran ISDN uses a maximum frame size of 253 bytes.