MULTI-TECH SYSTEMS, INC. ======================== MT3334ZDX, MT3334ZDXV Card Type Modem, Fax Chip Set Unidentified I/O Options Serial ports, power jack, line in, line out Maximum Modem Rate 33.6Kbps Maximum Fax Rate 14.4Kbps Data Modulation Bell 103A/212A Protocol ITU-T V.32bis, V.34 Fax Modulation ITU-T V.17 Protocol Error MNP5, V.42, V.42bis Correction/Compression Fax Class Unidentified Data Bus External +------------------------------------------------------------+ | CONNECTIONS | |------------------------------------------------------------| | Function | Label | Function | Label | |------------------------------------------------------------| | Line in via RJ-11 | CN1 | Serial port | CN3 | |-----------------------------+---------+-------------+------| | Line out via RJ-11 | CN2 | Power jack | CN4 | +------------------------------------------------------------+ +------------------------------------------------------------+ | DIAGNOSTIC LED(S) | |------------------------------------------------------------| | LED | Color | Status | Condition | |---------+----------------+----------+----------------------| | TD | Unidentified | Blinking | Modem transmitting | | | | | data | |---------+----------------+----------+----------------------| | TD | Unidentified | Off | Modem not | | | | | transmitting data | |---------+----------------+----------+----------------------| | RD | Unidentified | Blinking | Modem is receiving | | | | | data | |---------+----------------+----------+----------------------| | RD | Unidentified | Off | Modem is not | | | | | receiving data | |---------+----------------+----------+----------------------| | CD | Unidentified | On | Carrier signal | | | | | detected | |---------+----------------+----------+----------------------| | CD | Unidentified | Off | Carrier signal not | | | | | detected | |---------+----------------+----------+----------------------| | V.34 | Unidentified | On | Modem connected in | | | | | V.34 mode at | | | | | 33.6Kbps | |---------+----------------+----------+----------------------| | V.34 | Unidentified | Off | Modem is not | | | | | connected in V.34 | | | | | mode at 33.6Kbps | |---------+----------------+----------+----------------------| | V.32bis | Unidentified | On | Modem connected in | | | | | V.32bis mode or less | |---------+----------------+----------+----------------------| | V.32bis | Unidentified | Off | Modem is not | | | | | connected in V.32bis | | | | | mode | |---------+----------------+----------+----------------------| | 9.6 | Unidentified | On | Modem is connected | | | | | at 9.6Kbps | |---------+----------------+----------+----------------------| | 9.6 | Unidentified | Off | Modem is not | | | | | connected at 9.6Kbps | |---------+----------------+----------+----------------------| | OH | Unidentified | On | Modem is on-hook | |---------+----------------+----------+----------------------| | OH | Unidentified | Off | Modem is off-hook | |---------+----------------+----------+----------------------| | TR | Unidentified | On | DTR signal is high | |---------+----------------+----------+----------------------| | TR | Unidentified | Off | DTR signal is low | |---------+----------------+----------+----------------------| | EC | Unidentified | On | Modem is set for | | | | | V.42 error | | | | | compression | |---------+----------------+----------+----------------------| | EC | Unidentified | Off | Modem is not set for | | | | | V.42 error | | | | | compression | |---------+----------------+----------+----------------------| | EC | Unidentified | Blinking | Data compression | | | | | enabled | |---------+----------------+----------+----------------------| | FAX | Unidentified | On | Modem is in Fax mode | |---------+----------------+----------+----------------------| | FAX | Unidentified | Off | Modem is not in Fax | | | | | mode | +------------------------------------------------------------+ +---------------------------------------------------------+ | SUPPORTED COMMAND SET | |---------------------------------------------------------| | Basic AT Commands | |---------------------------------------------------------| | AT, A/ | |---------------------------------------------------------| | A, B, E, F, H, M, O, Q, S, V, Y, Z | |---------------------------------------------------------| | &C, &F, &G, &V, &Z | |---------------------------------------------------------| | Extended AT Commands | |---------------------------------------------------------| | \V | |---------------------------------------------------------| | S Registers | |---------------------------------------------------------| | S0, S1, S2, S3, S4, S5, S6, S7, S8, S10, S11, S30 | |---------------------------------------------------------| | | |---------------------------------------------------------| | Note: See MHI Help File for full command documentation. | +---------------------------------------------------------+ Proprietary AT Command Set +------------------------------------------------------------+ | TRANSMIT CARRIER | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] Cn [cmds] | |--------------+---------------------------------------------| | Description: | Controls the transmit carrier switching | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | C1 | Transmit carrier enabled | +------------------------------------------------------------+ +------------------------------------------------------------+ | DIAL | |------------------------------------------------------------| | Type: | Immediate | |--------------+---------------------------------------------| | Format: | AT [cmds] D<#> [cmds] | |--------------+---------------------------------------------| | Description: | Dials telephone number according to any | | | modifiers included in the string | |--------------+---------------------------------------------| | Note: | Any combination of modifiers can be used to | | | produce the desired dial functions in | | | sequence. | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | DL | Re-dial last number | |--------------+---------------------------------------------| | DP | Pulse dialing enabled | |--------------+---------------------------------------------| | DS=n | Dial stored telephone number n | |--------------+---------------------------------------------| | DT | Tone dialing enabled/Pulse dialing disabled | |--------------+---------------------------------------------| | DW | Dialing resumed following dial tone | | | detection | |--------------+---------------------------------------------| | D, | Dialing paused for amount of time specified | | | in S8 register | |--------------+---------------------------------------------| | D! | Flash function initiated. Modem commanded | | | to go off-hook for specified time before | | | returning on-hook. | |--------------+---------------------------------------------| | D@ | Wait for quiet Answer function enabled. | | | Modem waits until a "quiet answer," a | | | ring-back signal followed by silence up to | | | the time specified in S7, is received prior | | | to executing the rest of the dial string. | |--------------+---------------------------------------------| | D; | Modem returned to idle state after dialing. | | | The semicolon can only be placed at the end | | | of the dial command. | |--------------+---------------------------------------------| | D$ | Calling card "Bong" detection enabled | |--------------+---------------------------------------------| | DV | Switch to speakerphone | |--------------+---------------------------------------------| | D^ | Data calling tone transmission disabled | +------------------------------------------------------------+ +------------------------------------------------------------+ | REPORT INFORMATION | |------------------------------------------------------------| | Type: | Immediate | |--------------+---------------------------------------------| | Format: | AT [cmds] In [cmds] | |--------------+---------------------------------------------| | Description: | Displays information requested | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | I0 | Reports default speed and controller | | | firmware code | |--------------+---------------------------------------------| | I1 | Reports ROM checksum | |--------------+---------------------------------------------| | I2 | Tests and reports ROM checksum | |--------------+---------------------------------------------| | I3 | Reports default speed and controller | | | firmware code | |--------------+---------------------------------------------| | I4 | Reports data pump model and revision code | +------------------------------------------------------------+ +------------------------------------------------------------+ | SPEAKER VOLUME | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] Ln [cmds] | |--------------+---------------------------------------------| | Description: | Controls speaker volume | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | L0 | Low volume setting | |--------------+---------------------------------------------| | L1 | Low volume setting | |--------------+---------------------------------------------| | L2 | Medium volume setting | |--------------+---------------------------------------------| | L3 | Highest volume setting | +------------------------------------------------------------+ +------------------------------------------------------------+ | AUTO-MODE DETECTION | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] Nn [cmds] | |--------------+---------------------------------------------| | Description: | Selects various options for the automatic | | | detection and negotiation of protocols | | | during the handshake process if the modem | | | is communicating with a remote modem of | | | dissimilar speed. | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | N0 | In originate mode, handshake begins at line | | | speed designated by the S37 register and | | | the B command | |--------------+---------------------------------------------| | N1 | In originate mode, handshake begins at line | | | speed designated by the S37 register. and | | | the B command Modem can shift to a slower | | | speed if necessary. | +------------------------------------------------------------+ +------------------------------------------------------------+ | SELECT CALL PROGRESS RESULT CODES | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] Xn [cmds] | |--------------+---------------------------------------------| | Description: | Enables selection of tone detection and | | | associated result code format options | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | X0 | Busy and dial tone detection disabled; | | | basic result codes enabled. | |--------------+---------------------------------------------| | X1 | Busy and dial tone detection disabled; | | | extended result codes enabled. | |--------------+---------------------------------------------| | X2 | Busy tone detection disabled, dial tone | | | detection enabled; extended result codes | | | enabled. | |--------------+---------------------------------------------| | X3 | Busy tone detection enabled, dial tone | | | detection disabled; extended result codes | | | enabled. | |--------------+---------------------------------------------| | X4 | Busy and dial tone detection disabled; | | | extended result codes enabled. | +------------------------------------------------------------+ +------------------------------------------------------------+ | DATA TERMINAL READY (DTR) | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] &Dn [cmds] | |--------------+---------------------------------------------| | Description: | Selects modem response to DTR | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | &D0 | Modem does not respond to DTR | |--------------+---------------------------------------------| | &D1 | Modem goes to command mode after DTR goes | | | is off | |--------------+---------------------------------------------| | &D2 | Modem goes to command mode and disconnects | | | (hangs up) after DTR goes off; Auto-Answer | | | is disabled. | |--------------+---------------------------------------------| | &D3 | Modem is initialized after DTR goes off | +------------------------------------------------------------+ +------------------------------------------------------------+ | AUXILLARY RELAY CONTROL | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] &J [cmds] | |--------------+---------------------------------------------| | Description: | Controls auxiliary relay | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | &J0 | Auxiliary relay remains open | |--------------+---------------------------------------------| | &J1 | Not supported | +------------------------------------------------------------+ +------------------------------------------------------------+ | FLOW CONTROL | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] &Kn [cmds] | |--------------+---------------------------------------------| | Description: | Enables flow control options | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | &K0 | Flow control disabled | |--------------+---------------------------------------------| | &K3 | RTS to CTS flow control enabled | |--------------+---------------------------------------------| | &K4 | XON/XOFF flow control enabled | +------------------------------------------------------------+ +------------------------------------------------------------+ | COMMUNICATIONS MODE | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] &Mn [cmds] | |--------------+---------------------------------------------| | Description: | Selects communications mode | |--------------+---------------------------------------------| | Command | Mode | |--------------+---------------------------------------------| | &M0 | Asynchronous mode | +------------------------------------------------------------+ +------------------------------------------------------------+ | COMMUNICATIONS MODE | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] &Qn [cmds] | |--------------+---------------------------------------------| | Description: | Selects communications mode options | |--------------+---------------------------------------------| | Command | Mode | |--------------+---------------------------------------------| | &Q0 | Asynchronous mode, serial port speed | | | follows connect speed. | |--------------+---------------------------------------------| | &Q5 | Error correction mode | |--------------+---------------------------------------------| | &Q6 | Buffered asynchronous mode | +------------------------------------------------------------+ +------------------------------------------------------------+ | DATA SET READY (DSR) | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] &Sn [cmds] | |--------------+---------------------------------------------| | Description: | Selects DSR options | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | &S0 | DSR forced high | |--------------+---------------------------------------------| | &S1 | DSR high only while modem is connected | +------------------------------------------------------------+ +------------------------------------------------------------+ | TEST MODES | |------------------------------------------------------------| | Type: | Immediate | |--------------+---------------------------------------------| | Format: | AT [cmds] &Tn | |--------------+---------------------------------------------| | Description: | Selects test options | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | &T0 | End current test | |--------------+---------------------------------------------| | &T1 | Begin local analog loopback test | |--------------+---------------------------------------------| | &T3 | Begin local digital loopback | |--------------+---------------------------------------------| | &T6 | Request remote digital loopback | +------------------------------------------------------------+ +------------------------------------------------------------+ | STORE ACTIVE PROFILE | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] &Wn [cmds] | |--------------+---------------------------------------------| | Description: | Writes the values for the active profile | | | into the non-volatile RAM | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | &W0 | Write the active profile to NVRAM | +------------------------------------------------------------+ +------------------------------------------------------------+ | RESTORE PROFILE ON POWER-UP | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] &Yn [cmds] | |--------------+---------------------------------------------| | Description: | Restores a selected profile into the active | | | profile on power-up (hard reset) | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | &Y0 | Restore profile 0 on power-up | +------------------------------------------------------------+ Extended AT Commands +------------------------------------------------------------+ | BREAK TYPE | |------------------------------------------------------------| | Type: | Configuration | |---------------------+--------------------------------------| | Format: | AT [cmds] \Kn [cmds] | |---------------------+--------------------------------------| | Description: | Configures action of break signal | |------------------------------------------------------------| | Command | Break from | Modem receives | Break received | | | DTE | \B | from remote | | | | | modem | |------------+-------------+----------------+----------------| | \K5 | Send break | Send break | Break sent | | | with | with | with received | | | transmitted | transmitted | data to the | | | data | data | DTE | +------------------------------------------------------------+ +------------------------------------------------------------+ | CONNECT MODE | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] \Nn [cmds] | |--------------+---------------------------------------------| | Description: | Controls the type of connection the modem | | | will operate in | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | \N0 | Normal mode enabled | |--------------+---------------------------------------------| | \N1 | Direct mode enabled | |--------------+---------------------------------------------| | \N2 | Reliable mode enabled | |--------------+---------------------------------------------| | \N3 | V.42/MNP auto-reliable mode enabled | |--------------+---------------------------------------------| | \N4 | V.42 reliable mode enabled | |--------------+---------------------------------------------| | \N5 | V.42, MNP, or normal mode | +------------------------------------------------------------+ +------------------------------------------------------------+ | COMPRESSION | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] %Cn [cmds] | |--------------+---------------------------------------------| | Description: | Selects data compression | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | %C0 | Data compression disabled | |--------------+---------------------------------------------| | %C1 | V.42bis/MNP5 enabled | +------------------------------------------------------------+ Special Commands +------------------------------------------------------------+ | DTR DIALING | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] $Dn [cmds] | |--------------+---------------------------------------------| | Description: | Enables/disables DTR dialing | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | $D0 | DTR dialing disabled | |--------------+---------------------------------------------| | $D1 | DTR dialing enabled | +------------------------------------------------------------+ +------------------------------------------------------------+ | MODEM BAUD RATE | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] $MBn [cmds] | |--------------+---------------------------------------------| | Description: | Selects modem baud rate | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | $MB75 | CCITT V.23 mode | |--------------+---------------------------------------------| | $MB300 | 300bps | |--------------+---------------------------------------------| | $MB1200 | 1200bps | |--------------+---------------------------------------------| | $MB2400 | 2400bps | |--------------+---------------------------------------------| | $MB4800 | 4800bps | |--------------+---------------------------------------------| | $MB9600 | 9600bps | |--------------+---------------------------------------------| | $MB14400 | 14.4Kbps | |--------------+---------------------------------------------| | $MB19200 | 19.2Kbps | |--------------+---------------------------------------------| | $MB28800 | 28.8Kbps | |--------------+---------------------------------------------| | $MB33600 | 33.6Kbps | +------------------------------------------------------------+ +------------------------------------------------------------+ | SERIAL PORT BAUD RATE | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] $SBn [cmds] | |--------------+---------------------------------------------| | Description: | Selects serial port baud rate | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | $SB300 | 300bps | |--------------+---------------------------------------------| | $SB1200 | 1200bps | |--------------+---------------------------------------------| | $SB2400 | 2400bps | |--------------+---------------------------------------------| | $SB4800 | 4800bps | |--------------+---------------------------------------------| | $SB9600 | 9600bps | |--------------+---------------------------------------------| | $SB19200 | 19.2Kbps | |--------------+---------------------------------------------| | $SB38400 | 38.4Kbps | |--------------+---------------------------------------------| | $SB57600 | 57.6Kbps | |--------------+---------------------------------------------| | $SB115200 | 115.2Kbps | +------------------------------------------------------------+ S(STATUS) -REGISTERS +------------------------------------------------------------+ | ESCAPE CHARACTER | |------------------------------------------------------------| | Type: | Register | |--------------+---------------------------------------------| | Format | AT [cmds] S9=n [cmds] | |--------------+---------------------------------------------| | Range: | 1-127 | |--------------+---------------------------------------------| | Unit: | ASCII | |--------------+---------------------------------------------| | Description: | Defines remote configuration escape | | | character. | +------------------------------------------------------------+ +------------------------------------------------------------+ | V.34 MODULATION | |------------------------------------------------------------| | Type: | Register | |----------------+-------------------------------------------| | Format | AT [cmds] S28=n [cmds] | |----------------+-------------------------------------------| | Range: | 0-255 | |----------------+-------------------------------------------| | Unit: | Decimal | |----------------+-------------------------------------------| | Description: | Enables V.34 modulation | |------------------------------------------------------------| | Note: S28=0 disables V.34 modulation. | +------------------------------------------------------------+ +------------------------------------------------------------+ | V.25 CALLING TONE | |------------------------------------------------------------| | Type: | Register | |--------------+---------------------------------------------| | Format | AT [cmds] S35=n [cmds] | |--------------+---------------------------------------------| | Range: | 0-1 | |--------------+---------------------------------------------| | Unit: | Decimal | |--------------+---------------------------------------------| | Description: | Enables V.25 data calling tone, which | | | allows remote data/fax/voice discrimination | |------------------------------------------------------------| | Note: S35=0 disables V.25 data calling tone. | +------------------------------------------------------------+ +------------------------------------------------------------+ | ERROR CORRECTION NEGOTIATION | |------------------------------------------------------------| | Type: | Register | |------------------------+-----------------------------------| | Format | AT [cmds] S36=n [cmds] | |------------------------+-----------------------------------| | Description: | Selects the action of the modem | | | if it fails to connect when error | | | control is selected. | |------------------------------------------------------------| | Command | S48=7 | S48=128 | |-----------+-----------------------+------------------------| | S36=0 | LAPM or hang-up | Not used | |-----------+-----------------------+------------------------| | S36=1 | LAPM or Asynchronous | Asynchronous | |-----------+-----------------------+------------------------| | S36=2 | LAPM or hang-up | Not used | |-----------+-----------------------+------------------------| | S36=3 | LAPM or Asynchronous | Asynchronous | |-----------+-----------------------+------------------------| | S36=4 | LAPM, MNP, or hang-up | MNP or hang-up | |-----------+-----------------------+------------------------| | S36=5 | LAPM, MNP, or | MNP or Asynchronous | | | Asynchronous | | |-----------+-----------------------+------------------------| | S36=6 | LAPM, MNP, or hang-up | MNP or hang-up | |-----------+-----------------------+------------------------| | S36=7 | LAPM, MNP, or | MNP or Asynchronous | | | Asynchronous | | +------------------------------------------------------------+ +------------------------------------------------------------+ | DCE LINE SPEED | |------------------------------------------------------------| | Type: | Register | |--------------+---------------------------------------------| | Format | AT [cmds] S37=n [cmds] | |--------------+---------------------------------------------| | Description: | Sets the maximum allowable data exchange | | | rate attempted during handshake process. | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | S37=0 | Maximum speed | |--------------+---------------------------------------------| | S37=1 | Reserved | |--------------+---------------------------------------------| | S37=2 | 1200/75bps | |--------------+---------------------------------------------| | S37=3 | 300bps | |--------------+---------------------------------------------| | S37=4 | Reserved | |--------------+---------------------------------------------| | S37=5 | 1200bps | |--------------+---------------------------------------------| | S37=6 | 2400bps | |--------------+---------------------------------------------| | S37=7 | 4800bps | |--------------+---------------------------------------------| | S37=8 | 7200bps | |--------------+---------------------------------------------| | S37=9 | 9600bps | |--------------+---------------------------------------------| | S37=10 | 12.0Kbps | |--------------+---------------------------------------------| | S37=11 | 14.4Kbps | |--------------+---------------------------------------------| | S37=12 | 16.8Kbps | |--------------+---------------------------------------------| | S37=13 | 19.2Kbps | |--------------+---------------------------------------------| | S37=14 | 21.6Kbps | |--------------+---------------------------------------------| | S37=15 | 24.0Kbps | |--------------+---------------------------------------------| | S37=16 | 26.4Kbps | |--------------+---------------------------------------------| | S37=17 | 28.8Kbps | |--------------+---------------------------------------------| | S37=18 | 31.2Kbps | |--------------+---------------------------------------------| | S37=19 | 33.6Kbps | +------------------------------------------------------------+ +------------------------------------------------------------+ | V32bis, V.22bis AUTO RATE | |------------------------------------------------------------| | Type: | Register | |----------------+-------------------------------------------| | Format | AT [cmds] S42=n [cmds] | |----------------+-------------------------------------------| | Range: | 0-1 | |----------------+-------------------------------------------| | Unit: | Decimal | |----------------+-------------------------------------------| | Description: | Enables V.32bis and V.22bis auto rate | |------------------------------------------------------------| | Note: S42=0 disables V.32bis and V.22bis auto rate. | | For testing purposes only. | +------------------------------------------------------------+ +------------------------------------------------------------+ | V32bis STARTUP MODE | |------------------------------------------------------------| | Type: | Register | |------------------+-----------------------------------------| | Format | AT [cmds] S43=n [cmds] | |------------------+-----------------------------------------| | Range: | 0-1 | |------------------+-----------------------------------------| | Unit: | Decimal | |------------------+-----------------------------------------| | Description: | Enables V.32bis start-up auto mode | | | operation | |------------------------------------------------------------| | Note: S43=0 disables V.32bis start-up auto mode. For | | testing purposes only. | +------------------------------------------------------------+ +------------------------------------------------------------+ | FEATURE NEGOTIATION | |------------------------------------------------------------| | Type: | Register | |------------------------------------------------------------| | Format: | AT [cmds] S48=n [cmds] | |------------------------------------------------------------| | Range: | 7, 128 | |------------------------------------------------------------| | Description: | Selects active error correction and | | | compression protocols. See S36, error | | | correction negotiation table | +------------------------------------------------------------+ +------------------------------------------------------------+ | INACTIVITY TIMER | |------------------------------------------------------------| | Type: | Register | |--------------+---------------------------------------------| | Format: | AT [cmds] S89=n [cmds] | |--------------+---------------------------------------------| | Range: | 0, 5-255 | |--------------+---------------------------------------------| | Unit: | 1 second | |--------------+---------------------------------------------| | Description: | Sets the length of time that the modem does | | | not receive information before it | | | disconnects; S89=0 will disable. | +------------------------------------------------------------+