MICROCOM, INC. DESKPORTE FAST Card Type Modem (synchronous/asynchronous) Processor Z80182 Processor Speed 18.4MHz Chipset Microcom Maximum Onboard Memory 64KB SRAM (32KB battery backup)/128KB Flash ROM Maximum Data Rate 28.8Kbps Maximum Fax Rate 14.4Kbps Data Bus Serial, parallel Fax Class Class I Data Modulation Bell 103A/212A ITU-T V.21, V.22, V.23, V.22bis, V.32, V.32bis Rockwell V.FC Fax Modulation Unidentified Error Correction/Compression MNP5, MNP10, V.42, V.42bis [Image] CONNECTIONS Function Label Function Label Talk/Data button BT1 RS-232/422 port CN3 Originate/Answer button BT2 DC power CN4 Power switch BT3 Parallel port CN5 Line in CN1 LCD display LCD Line out CN2 Volume R1 USER CONFIGURABLE SETTINGS Setting Label Position Factory configured - do not alter JP2 Unidentified Factory configured - do not alter JP4 Unidentified Pin 1 of serial port connected to JP6 Pins 2 & 3 closed signal ground Pin 1 of serial port connected to JP6 Pins 1 & 2 closed chassis ground Received signal level set to -43 dBm JP7 Pins 1 & 2 closed Received signal level set to -33 dBm JP7 Pins 2 & 3 closed LINE TYPE SELECTION Setting JP1/A JP1/B JP1/C Leased line (0 dBm) Open Open Closed Permissive (-10 dBm) Closed Open Open Programmable (-12 Open Closed Open dBm) CONFIGURATION MODE FUNCTION Mode Function 0 Normal operation of modem - sets power-up defaults for various commands 1 Controls flow control and connect mode defaults 2 Selects leased-line and synchronous mode options 3 Controls serial port signals 4 Controls synchronous clock and busy out 5 Selects echo and result code formatting 6 Controls various command options 7 Selects flow control and parity checking 8 Controls serial port parity and speed 9 Configures line speed options 10 Performs diagnostic tests Note: The DeskPorte FAST modem can be configured by switches in eleven modes, although command configuration is preferable when possible. Configuration modes 1 through 9 can be stored in NVRAM by pressing the reset switch. Mode 0 is read on reset or power-up is SW2/5 is on. If SW2/5 is off, no switch settings will be used. Before operating, the modem’s switches should be returned to mode 0 and the appropriate settings made. CONFIGURATION MODE SELECTION Setting SW1/1 SW1/2 SW1/3 SW1/4 0 Off Off Off Off 1 On Off Off Off 2 Off On Off Off 3 On On Off Off 4 Off Off On Off 5 On Off On Off 6 Off On On Off 7 On On On Off 8 Off Off Off On 9 On Off Off On 10 On On On On Configuration Mode 0 - Normal Operation USER CONFIGURABLE SETTINGS Setting Label Position Factory configured - do not alter SW2/3 Off Modem reloads user configuration on reset SW2/4 Off Modem reloads factory configuration on reset SW2/4 On Modem does not load configuration from switches SW2/5 Off Modem loads configuration from switches SW2/5 On Cellular phone support disabled SW2/6 Off Cellular phone support enabled SW2/6 On Command set enabled SW2/7 Off Command set disabled SW2/7 On Auto-answer enabled SW2/8 Off Auto-answer disabled SW2/8 On COMMAND SET SELECTION Setting SW2/1 SW2/2 Asynchronous AT Off Off Asynchronous V.25bis On Off Synchronous V.25bis Off On Transparent synchronous, command On On set disabled Configuration Mode 1 - Flow Control/Connect Mode USER CONFIGURABLE SETTINGS Setting Label Position Factory configured - do not alter SW2/6 N/A Factory configured - do not alter SW2/7 N/A Factory configured - do not alter SW2/8 N/A FLOW CONTROL SELECTION Setting SW2/1 SW2/2 Use setting from command set Off Off Flow control disabled On Off Use bidirectional XON/XOFF Off On Use unidirectional XON/XOFF On On CONNECT MODE SELECTION Setting SW2/3 SW2/4 SW2/5 Use setting from command set Off Off Off Normal mode On Off Off Direct mode Off On Off Reliable mode On On Off Auto-reliable mode Off Off On LAPM reliable mode On Off On LAPM auto-reliable mode Off On On LAPM and MNP reliable mode On On On Configuration Mode 2 - Leased-Line/Synchronous USER CONFIGURABLE SETTINGS Setting Label Position Factory configured - do not alter SW2/8 N/A SYNCHRONOUS AUTO-DIAL CONFIGURATION Setting SW2/1 SW2/2 Use setting from command set Off Off Manual dial only On Off Dial first stored number Off On Dial second stored number On On LINE TYPE SELECTION Setting SW2/3 SW2/4 SW2/5 Use setting from command set Off Off Off Switched line type On Off Off Leased line type Off On Off Leased line type, modem will go On On Off off hook for 6 seconds when Originate/Answer button pushed SYNCHRONOUS MODE CTS SIGNAL CONFIGURATION Setting SW2/6 SW2/7 Use setting from command set Off Off CTS follows RTS On Off CTS forced high Off On CTS and RTS emulate half-duplex On On connection Configuration Mode 3 - Serial Port Signals CD SIGNAL CONFIGURATION Setting SW2/1 SW2/2 Use setting from command set Off Off CD forced high On Off CD normal Off On CD forced high except at On On disconnect DSR AND CTS SIGNAL CONFIGURATION Setting SW2/3 SW2/4 SW2/5 Use setting from command Off Off Off set DSR and CTS forced high On Off Off CTS follows CD; if &C is Off On Off not set to 1 then DSR also follows CD, otherwise it follows OH DSR and CTS follow CD On On Off DSR normal, CTS forced high Off Off On DSR and CTS normal On Off On DTR SIGNAL CONFIGURATION Setting SW2/6 SW2/7 SW2/8 Use setting from command Off Off Off set DTR ignored On Off Off Modem enters command state Off On Off on low DTR Modem goes on hook on low On On Off DTR Modem resets on low DTR Off Off On Configuration Mode 4 - Clock Source/Busy Out USER CONFIGURABLE SETTINGS Setting Label Position Factory configured - do not alter SW2/5 N/A Factory configured - do not alter SW2/6 N/A Factory configured - do not alter SW2/7 N/A Factory configured - do not alter SW2/8 N/A LOOPBACK TEST AND BUSY OUT CONFIGURATION Setting SW2/1 SW2/2 Use setting from command set Off Off Pins 18 and 21 have no On Off function Busy Out when pin 18 is high, Off On perform local analog loopback test on high DTR Perform local analog loopback On On test when pin 18 is high, remote digital loopback test when pin 21 is high CLOCK SOURCE SELECTION Setting SW2/3 SW2/4 Use setting from command set Off Off Internal clock source On Off External clock source Off On Slave to remote clock On On Configuration Mode 5 - Echo/Result Codes USER CONFIGURABLE SETTINGS Setting Label Position Factory configured - do not alter SW2/7 N/A Factory configured - do not alter SW2/8 N/A COMMAND ECHO CONFIGURATION Setting SW2/1 SW2/2 Use setting from command set Off Off Command echo disabled On Off Command echo enabled Off On RESULT CODE CONFIGURATION Setting SW2/3 SW2/4 Use setting from command set Off Off Result codes enabled On Off Result codes disabled Off On Result codes enabled on On On originate only RESULT CODE TYPE SELECTION Setting SW2/5 SW2/6 Use setting from command set Off Off Modem will send verbose On Off result codes Modem will send numeric On On result codes Configuration Mode 6 - Various ERROR CORRECTION RESULT CODE CONFIGURATION Setting SW2/1 SW2/2 Use setting from command set Off Off Use standard format On Off Use error correction result Off On codes with 9600 given for all speeds between 4800bps and 12Kbps Use error correction result On On codes with real speed given SERIAL PORT SPEED LOCK SELECTION Setting SW2/3 SW2/4 Use setting from command set Off Off Serial port speed locked On Off Serial port speed follows On On connect speed BREAK TYPE Setting SW2/5 SW2/6 Use setting from command set Off Off Use setting for \K0 On Off Use setting for \K1 Off On Use setting for \K5 On On INACTIVITY TIMER Setting SW2/7 SW2/8 Use setting from command set Off Off Inactivity timer disabled On Off Set inactivity timer to 2 Off On minutes Set inactivity timer to 15 On On minutes Configuration Mode 7 - Flow Control/Parity Checking USER CONFIGURABLE SETTINGS Setting Label Position Factory configured - do not alter SW2/6 N/A Factory configured - do not alter SW2/7 N/A Factory configured - do not alter SW2/8 N/A FLOW CONTROL Setting SW2/1 SW2/2 SW2/3 Use setting from command set Off Off Off Flow control disabled On Off Off Bidirectional XON/XOFF flow Off On Off control enabled CTS flow control by DCE On On Off enabled Bidirectional RTS/CTS flow Off Off On control enabled Unidirectional XON/XOFF flow On Off On control by DCE enabled CTS forced low until Off On On connection then CTS flow control by DCE Bidirectional RTS/CTS flow On On On control after connection ESCAPE AND FLOW CONTROL CHARACTER PARITY CHECKING Setting SW2/4 SW2/5 Use setting from command set Off Off Parity checking of flow control On Off and escape characters disabled Flow control and escape Off On characters will be processed only if their parity matches serial port Escape characters will be On On processed only if their parity matches serial port Configuration Mode 8 - Serial Port Parity/Speed USER CONFIGURABLE SETTINGS Setting Label Position Factory configured - do not alter SW2/8 N/A SERIAL PORT PARITY SELECTION Setting SW2/1 SW2/2 SW2/3 SW2/4 Use setting from command set Off Off Off Off Seven data bits, odd parity On Off Off Off Seven data bits, even parity Off On Off Off Seven data bits, MARK parity On On Off Off Seven data bits, SPACE parity Off Off On Off Eight data bits, no parity On Off On Off Eight data bits, odd parity Off On On Off Eight data bits, even parity On On On Off Eight data bits, MARK parity Off Off Off On LOCAL SERIAL PORT SPEED SELECTION Setting SW2/5 SW2/6 SW2/7 Use setting from command set Off Off Off 2400bps serial port speed On Off Off 4800bps serial port speed Off On Off 9600bps serial port speed On On Off 19.2Kbps serial port speed Off Off On 38.4Kbps serial port speed On Off On 57.6Kbps serial port speed Off On On 115.2Kbps serial port speed On On On Configuration Mode 9 - Line Speed USER CONFIGURABLE SETTINGS Setting Label Position Factory configured - do not alter SW2/8 N/A LINE SPEED SELECTION Setting SW2/1 SW2/2 SW2/3 Use setting from command set Off Off Off 2400bps line speed On Off Off 4800bps line speed Off On Off 9600bps line speed On On Off 14.4Kbps line speed Off Off On 19.2Kbps line speed On Off On 24Kbps line speed Off On On 28.8Kbps line speed On On On SPEED MATCHING CONFIGURATION Setting SW2/4 SW2/5 Use setting from command set Off Off Modem will match connect On Off speeds. Modem will connect only at Off On current speed. Modem will use ITU-T automode On On to match speeds. LINE SPEED DETERMINATION CONFIGURATION Setting SW2/6 SW2/7 Use setting from command set Off Off Line speed determined by serial On Off port speed Line speed determined by user Off On Configuration Mode 10 - Diagnostic Tests [Image] Diagram of switch position indicator TOGGLE SWITCHES Function Label Function Label Start or stop test in BT1 Start or stop test in SW2/3 progress progress USER CONFIGURABLE SETTINGS Setting Label Position Local digital loopback test enabled SW2/4 On Local digital loopback test disabled SW2/4 Off Local analog loopback test enabled SW2/5 On Local analog loopback test disabled SW2/5 Off Local analog loopback with self-test SW2/6 On enabled Local analog loopback with self-test SW2/6 Off disabled Display switch positions on front panel SW2/7 On LCD Do not display switch positions on SW2/7 Off front panel LCD Clear all switch positions SW2/8 On Normal operation SW2/8 Off Note: For information on SW2/7 please see the diagram above. Lit segments indicate that a switch is on, and unlit ones indicate a switch that is off. Switch settings may also be displayed with the %S command. The usage of SW2/8 is to clear all test modes. All switches should be in the off position before turning SW2/8 on. COMMAND SET SELECTION Setting SW2/1 SW2/2 Asynchronous AT Off Off Asynchronous V.25bis On Off Synchronous V.25bis Off On Synchronous, command set On On disabled DIAGNOSTIC LED(S) LED Color Status Condition TST Unidentified On System error has occurred TST Unidentified Off Modem is functioning normally TST Unidentified Blinking Modem has detected a data error or is retraining DCD Unidentified On Carrier signal detected DCD Unidentified Off Carrier signal not detected DTR Unidentified On DTR signal is high DTR Unidentified Off DTR signal is low RXD Unidentified Blinking Modem is receiving data RXD Unidentified Off Modem is not receiving data TXD Unidentified Blinking Modem is transmitting data TXD Unidentified Off Modem is not transmitting data SUPPORTED STANDARD COMMANDS Basic AT Commands +++, ‘comma’, A/ A, B, E, H, I, L, M, O, P, Q, T, V, W, X, Y, Z &D, &F, &G, &M, &P, &T, &W, &X, &Y, &Z Extended AT Commands \A, \B, \C, \E, \J, \N, \Q, \T %A, %C, %E, %F, %G V.25 Bis Commands CIC, CRN, CRS, DIC, INC, INV, LSN, PRN, RLN, VAL Special AT Commands -J, -K, *H, )M, @M, :E S-Registers S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S12, S14, S16, S18, S22, S23, S25, S26, S27 Note: See MHI documentation for complete information. Proprietary AT Command Set AUTO-LOGON Type: Immediate Format: AT [cmds] $An [cmds] Default: 0 Range: 0 - 9 Description: Performs the auto-logon sequence stored at memory location n. BIT-MAPPED REGISTER S21 Format AT [cmds] S21=n [cmds] Default: Unidentified Range: 0-253 Unit: Bit-mapped Description: Selects jack type, CTS, RTS, DCD, and DSR signals, low DTR action, and the long space disconnect function. Bit Value Function 0 0 Not used. 2, 1 00 CTS follows RTS in data mode; RTS is ignored in command mode. 01 CTS forced high, RTS is ignored. 10 ITU-T V.13 used to simulate half-duplex modes on full-duplex connections. 4, 3 00 DTR signal ignored. 01 Modem goes to command mode on low DTR. 10 Modem disconnects on low DTR; Auto-Answer is disabled. 11 Modem is initialized on low DTR. 5 0 DCD forced high. 1 DCD normal. 6 0 Not used. 7 0 Long space disconnect function disabled. 1 Long space disconnect function enabled. BIT-MAPPED REGISTER :T15 Format: AT [cmds] :T15=n [cmds] Default: 133 Range: 0 - 229 Description: Controls CTS, RTS, and CD signals, synchronous clocks, and V.32 answer tones. Bit Value Function 0 0 CTS normal during synchronous and direct asynchronous mode retrains. 1 CTS forced low during synchronous and direct asynchronous mode retrains. 1 0 Not used. 2 0 When &R is set to 0 or 2, RTS is ignored when not connected. 1 When &R is set to 0 or 2, CTS follows RTS when not connected. 3 0 Not used. 4 0 Not used. 5 0 Synchronous clock disabled when not connected. 1 Synchronous clock enabled when not connected. 6 0 CD follows link negotiation status. 1 When &C is set to 1, CD follows carrier. 7 0 V.32 answer tone phase is normal. 1 V.32 answer tone phase may be reversed. BIT-MAPPED REGISTER :T26 Format: AT [cmds] :T26=n [cmds] Default: 0 Range: 0 - 3 Description: Controls billing delay and V.32 answer tone length. Bit Value Function 0 0 2-second billing delay enabled. 1 2-second billing delay disabled. 1 0 Normal V.32 answer tone length. 1 Short V.32 answer tone length. BREAK TYPE Type: Configuration Format: AT [cmds] \Kn [cmds] Description: Configures the response the modem performs in response to a received break signal. Command Break from DTE Break from Modem Break from DTE receives \B remote modem Reliable/Normal mode Direct mode \K0 Enter command Send break to Buffers Buffers mode, do not remote modem cleared and cleared and send break to immediately, break sent to break sent to remote modem. then enter remote modem. DTE. command mode. \K1 Buffers cleared Send break to Buffers Buffers and break sent remote modem cleared and cleared and to remote immediately. break sent to break sent to modem. remote modem. DTE. \K2 Enter command Send break to Send break to Send break to mode, do not remote modem remote modem DTE send break to immediately, immediately. immediately. remote modem. then enter command mode. \K3 Send break to Send break to Send break to Send break to remote modem remote modem remote modem DTE immediately. immediately. immediately. immediately. \K4 Enter command Send break to Send break to Break sent mode, do not remote modem remote modem with received send break to immediately, with data to the remote modem. then enter transmitted DTE. command mode. data. \K5 Send break with Send break to Send break to Break sent transmitted remote modem remote modem with received data. immediately. with data to the transmitted DTE. data. CALL RESTORAL TIMER Type: Configuration Format: AT [cmds] )Hn [cmds] Default: 0 Range: 0 - 255 Unit: 1 minute Description: Sets the amount of time that the modem will attempt to reconnect to a MNP reliable mode call that has terminated abnormally. Setting )H to 0 disables this feature. If the modem reconnects successfully, the call will proceed as if it did not disconnect. CALL SECURITY Type: Configuration Format: AT [cmds] $Gn [cmds] Description: Selects whether the modem will use call security procedures on incoming connections. Command Function $G0 Call security disabled. $G1 Call security enabled. CALL SECURITY - DISPLAY PASSWORD TABLE Type: Immediate Format: AT [cmds] $I [cmds] Description: Displays the list of user IDs, passwords, and permission levels. CALL SECURITY - LOGON SEQUENCE Type: Configuration Format: AT [cmds] $Ln [cmds] Description: Changes the logon sequence n. Only sequences 5 through 9 are user configurable. The user will be prompted to enter the new logon sequence using the commands listed below. Errors will be indicated after the sequence by caret characters underneath the problem section. Command Function An Aborts the call if the last string specified to wait for is not received in n seconds. B Modem compares the user’s password to the password table. If it does not match the user is given two more tries, then disconnects. If the passwords match the modem acts according to the stored permission level. C Modem waits for 15 seconds for the remote modem to disconnect. If it does not then the local modem disconnects, waits five seconds, then calls the user at the number entered. If no number was entered the modem calls the number stored at the location matching the user number. Dn Delays for n seconds. Nn Waits for the user to enter his user ID. The following options are available: Option Function 0 Entered characters are not echoed. 1 Entered characters are echoed. 2 Entered characters are echoed as periods. Pn Waits for the user to enter his password. The following options are available: Option Function 0 Entered characters are not echoed. 1 Entered characters are echoed. 2 Entered characters are echoed as periods. CALL SECURITY - LOGON SEQUENCE (CON’T) Command Function Rn Restarts the logon sequence if the last string specified to wait for is not received in n seconds. Sn Skips to the next section of the logon sequence if the last string specified to wait for is not received in n seconds. Vn Waits for the user to enter his phone number for a callback sequence. The following options are available: Option Function 0 Entered characters are not echoed. 1 Entered characters are echoed. 2 Entered characters are echoed as periods. Z Modem compares the user’s password to the password table. If it does not match the user is given two more tries, then disconnects. If the passwords match the sequence continues. &n Calls the user back with logon sequence n. +n Continue with logon sequence n. ‘xxxxx’ Sends the string xxxxx to the calling modem. Control characters (including carriage returns) may be entered by preceding the character with a caret.) "xxxxx" Waits to receive the string xxxxx from the calling modem. CALL SECURITY - PASSWORD SELECTION Type: Configuration Format: AT [cmds] $Hn (prompt) AS #n: xxxxxxxx, yyyyyyyy, a Description: Sets the user ID, password, and permission level for user number n. The xxxxxxxx field indicates the user ID, the yyyyyyyy the password, and the a is the permission level. n must be between 1 and 40. Permission Function a=1 User will be connected if correct user ID and password are entered. a=2 User will be called back at stored phone number n. a=3 User will be prompted to enter a phone number at which to be called back. If number is not entered, user will be called back at stored phone number n. CD, CTS, AND DSR SIGNAL CONNECT TIMER Type: Register Format: AT [cmds] :T14=n [cmds] Default: 0 Range: 0 - 255 Unit: .1 second Description: Sets the amount time before or after the connect message that CD, CTS, and DSR will be brought high. CD, CTS, AND DSR SIGNAL TIMING Type: Configuration Format: AT [cmds] @Cn [cmds] Description: Selects whether the CD, CTS, and DSR signals are brought high before or after the connect message. Command Function @C0 CD, CTS, and DSR brought high after connect message. @C1 CD, CTS, and DSR brought high before connect message. CD SIGNAL Type: Configuration Format: AT [cmds] &Cn [cmds] Description: Controls the behaviour of the CD signal. Command Function &C0 CD forced high. &C1 CD normal. &C2 CD forced high except at disconnect. CD SIGNAL DELAY Type: Configuration Format: AT [cmds] :Un [cmds] Default: 0 Range: 0 - 255 Unit: 12.5 mS Description: Selects the amount of time that the modem delays before it brings the CD signal high. Note: This command only takes effect if :R is set to 1. COMMAND SET Type: Configuration Format: AT [cmds] -Hn [cmds] Description: Selects whether the modem will accept commands. Command Function -H0 Command sets enabled. -H1 Command sets disabled. CONNECT SPEED MATCHING Type: Configuration Format: AT [cmds] %Ln [cmds] Description: Selects whether the modem will attempt to match the connect speed of the remote modem. Command Function %L0 Modem will connect at speeds supported by the protocol selected only. %L1 Modem will match connect speeds. %L2 Modem will connect only at current speed. %L3 Modem will use ITU-T automode to match speeds. CONNECTION SECURITY - DISPLAY PASSWORD TABLE Type: Immediate Format: AT [cmds] $N [cmds] Description: Displays the list of connection passwords. CONNECTION SECURITY - PASSWORD SELECTION (ASYNCHRONOUS MODE) Type: Configuration Format: AT [cmds] %In [cmds] Description: Changes connection password number n. n must be between 0 and 4. The user will be prompted to enter the old and new passwords. Passwords must be exactly five characters, case insensitive. CONNECTION SECURITY - PASSWORD SELECTION (SYNCHRONOUS MODE) Type: Configuration Format: AT [cmds] %In;xxxxx;yyyyy [cmds] Description: Changes connection password number n. n must be between 0 and 4. The xxxxx represents the main security password, and the yyyyy is the new connection password. Passwords must be exactly five characters, case insensitive. CONNECTION SECURITY - PASSWORD SEND Type: Configuration Format: AT [cmds] $Mn [cmds] Description: Selects how the modem will attempt to connect to a secure system. Command Function $M0 Modem does not send connection password. $M1 Modem sends connection password 0. If password does not match any of the remote modem’s connection passwords, the modem disconnects. $M2 Modem sends connection password 0. If password does not match any of the remote modem’s connection passwords, the remote modem uses logon sequence 5 to give the user three tries to enter a connection password. If this fails, the modem disconnects. CTS DELAY TIMER Type: Register Format: AT [cmds] :T16=n [cmds] Default: 0 Range: 0 - 255 Unit: 12.5 mS Description: Sets the amount of time that the modem waits after a connection has been made and CD and DSR have gone high that the modem brings CTS high. CTS SIGNAL DELAY Type: Configuration Format: AT [cmds] :Vn [cmds] Default: 0 Range: 0 - 255 Unit: 12.5 mS Description: Selects the amount of time that the modem delays before it brings the CTS signal high. DIAL Type: Immediate Format: AT [cmds] D<#> [cmds] Description: Dials the telephone number indicated according to any modifiers included in the string. Command Function DA MNP10 link will be negotiated at 4800bps for this call. DJ MNP10 link will be negotiated at 1200bps for this call. DK MNP10 power level adjustment enabled for this call. DL Re-dial last number. DM Make a LAPM reliable mode connection this call. DNn If the dial attempt fails, the modem will attempt to dial stored number n. DO This call will be set for a cellular phone. Same as executing the following command: AT \N2 )M1 :E0 @M18 *H1 DP Pulse dialing enabled. DQ Make an LAPM auto-reliable mode connection this call. DR Answer mode enabled; originate mode disabled following handshake initiation. DS Dial the first stored telephone number. DT Tone dialing enabled. DU Make a direct mode connection this call. DV Make an LAPM or MNP reliable mode connection this call. DW Dialing resumed following dial tone detection. DX Make an auto-reliable mode connection this call. DY Make an MNP reliable mode connection this call. DZ Make a normal mode connection this call. D, Dialing paused for amount of time specified in S8 register. D/n Dial stored telephone number n. D! Flash function initiated. Modem commanded to go off-hook for specified time before returning on-hook. D+n Perform logon sequence n after connecting. 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$ Wait for prompt tone detection function enabled. Waits for prompt tone for amount of time specified by the S7 command. D; Modem returned to idle state after dialing. The semicolon can only be placed at the end of the dial command. DIAL REPEATEDLY Type: Immediate Format: AT [cmds] -D<#> [cmds] Description: Dials the number indicated up to nine times. DISCONNECT BUFFER DELAY Type: Configuration Format AT [cmds] %Dn [cmds] Default: 0 Range: 0-255 Unit: 1 second Description: Sets maximum duration allowed during buffered data calls for modem to perform clearing functions after losing carrier-signal or receiving a clear call signal from the remote modem and before initiating hang-up process. DISPLAY CONFIGURATION AND STATISTICS Type: Immediate Format: AT [cmds] \S [cmds] Description: Displays the settings of all commands and statistics about the current connection. DISPLAY FIRMWARE VERSION Type: Immediate Format: AT [cmds] %V [cmds] Description: Displays the current firmware version. DISPLAY REGISTERS Type: Immediate Format: AT [cmds] %Rn [cmds] Description: Displays all status registers. Command Function %R0 Displays all S registers. %R1 Displays all :T registers. DISPLAY ROM BOOTSTRAP VERSION Type: Immediate Format: AT [cmds] %V [cmds] Description: Displays the current ROM bootstrap version. DISPLAY STORED NUMBERS Type: Immediate Format: AT [cmds] \F [cmds] Description: Displays all stored telephone numbers. DISPLAY STORED SWITCH CONFIGURATION Type: Immediate Format: AT [cmds] -X [cmds] Description: Displays the stored switch configuration. See the switch settings for more information. DISPLAY SWITCH SETTINGS Type: Immediate Format: AT [cmds] %Sn [cmds] Description: Displays the settings of SW1 and SW2. Command Function %S0 Display settings of SW1/1-SW1/4. %S1 Display settings of SW2/1-SW2/8. DSR DISCONNECT TIMER Type: Register Format: AT [cmds] :T22=n [cmds] Default: 34 Range: 0 - 255 Unit: 12.5 mS Description: Sets the amount of time that the modem waits after disconnecting to lower DSR. DSR AND CTS SIGNALS Type: Configuration Format: AT [cmds] \Dn [cmds] Description: Controls the behaviour of the DSR and CTS signals. Command Function \D0 DSR and CTS forced high. \D1 CTS follows CD. If &C is not set to 1 then DSR also follows CD, otherwise it follows OH. \D2 DSR and CTS follow CD. \D3 DSR normal, CTS forced high. \D4 DSR and CTS normal. DSR SIGNAL DELAY Type: Configuration Format: AT [cmds] :Vn [cmds] Default: 0 Range: 0 - 255 Unit: 12.5 mS Description: Selects the amount of time that the modem delays before it brings the DSR signal high. ENQ/ACK PROTOCOL Type: Configuration Format: AT [cmds] \Hn [cmds] Description: Selects the Hewlett-Packard ENQ/ACK protocol. Command Function \H0 ENQ/ACK protocol disabled. \H1 ENQ/ACK protocol enabled in terminal mode. \H2 ENQ/ACK protocol enabled in host mode. ESCAPE AND FLOW CONTROL CHARACTER PARITY CHECKING Type: Configuration Format: AT [cmds] -Pn [cmds] Description: Selects whether the modem checks the parity of incoming escape and flow control characters. Command Function -P0 Parity checking of flow control and escape characters disabled. -P1 Flow control and escape characters will be processed only if their parity matches serial port. -P2 Escape characters will be processed only if their parity matches serial port. EXTENDED RESULT CODES Type: Configuration Format: AT [cmds] \Vn [cmds] Description: Selects what form of result codes will be issued. Command Function \V0 Extended result codes disabled. \V1 /REL added to reliable mode connections; CONNECT/9600 given for all speeds between 4800bps and 12Kbps. \V2 Error correction protocol result codes enabled; CONNECT/9600 given for all speeds between 4800bps and 12Kbps \V3 /REL added to reliable mode connections when verbose result codes are used; standard numeric result codes are used. \V4 Error correction protocol result codes enabled. FIRMWARE UPLOAD Type: Immediate Format: AT [cmds] ^C1 [cmds] Description: Initiates a transfer of a new firmware file. FIRMWARE UPLOAD Type: Immediate Format: AT [cmds] ^H [cmds] Description: Initiates an ASCII transfer of a new firmware file. FLOW CONTROL - MODEM TO MODEM Type: Configuration Format: AT [cmds] \Gn [cmds] Description: Selects the type of modem-to-modem flow control used. Command Function \G0 Flow control disabled. \G1 Bidirectional flow control enabled. \G2 Unidirectional flow control enabled. FLOW CONTROL CHARACTER - XOFF PRIMARY Type: Register Format: AT [cmds] :T10=n [cmds] Default: 19 Range: 0-255 Unit: ASCII Description: Sets the primary XOFF character. FLOW CONTROL CHARACTER - XOFF SECONDARY Type: Register Format: AT [cmds] :T12=n [cmds] Default: 251 Range: 0-255 Unit: ASCII Description: Sets the secondary XOFF character. FLOW CONTROL CHARACTER - XON PRIMARY Type: Register Format: AT [cmds] :T9=n [cmds] Default: 17 Range: 0-255 Unit: ASCII Description: Sets the primary XON character. FLOW CONTROL CHARACTER - XON SECONDARY Type: Register Format: AT [cmds] :T11=n [cmds] Default: 249 Range: 0-255 Unit: ASCII Description: Sets the secondary XON character. ITU-T AUTOMODE TIMER Type: Register Format: AT [cmds] :T13=n [cmds] Default: 15 Range: 0 - 255 Unit: .1 second Description: Sets the amount of time the modem attempts to connect with ITU-T automode before disconnecting. KERMIT AND UUCP PROTOCOLS Type: Configuration Format: AT [cmds] :Kn [cmds] Description: Controls the Kermit and UUCP transfer protocols. Command Function :K0 Kermit and UUCP protocols disabled. :K1 Kermit protocol enabled. :K2 UUCP G protocol enabled. KERMIT MARK CHARACTER Type: Configuration Format: AT [cmds] :Qn [cmds] Default: 1 Range: 0 - 31 Unit: 1 ASCII character Description: Sets the character that will be used as the beginning of packet marker when in Kermit protocol mode. LINE SPEED Type: Configuration Format: AT [cmds] %Bn [cmds] Description: Sets the speed that the modem will communicate with the DTE. Command Function %B75 Sets the serial port to 75bps. %B300 Sets the serial port to 300bps. %B600 Sets the serial port to 600bps. %B1200 Sets the serial port to 1200bps. %B2400 Sets the serial port to 2400bps. %B4800 Sets the serial port to 4800bps. %B7200 Sets the serial port to 7200bps. %B9600 Sets the serial port to 9600bps. %B12000 Sets the serial port to 12Kbps. %B14400 Sets the serial port to 14.4Kbps. %B19200 Sets the serial port to 19.2Kbps. %B16800 Sets the serial port to 38.4Kbps. %B19200 Sets the serial port to 57.6Kbps. %B21600 Sets the serial port to 21.6Kbps. %B24000 Sets the serial port to 24Kbps. %B26400 Sets the serial port to 26.4Kbps. %B28800 Sets the serial port to 28.8Kbps. LINE TYPE Type: Configuration Format: AT [cmds] &Ln [cmds] Description: Selects what type of line the modem is connected to and whether it will attempt to automatically re-connect. Command Function &L0 Modem is connected to switched line. &L1 Modem is connected to 2-wire leased line. &L2 Modem is connected to 2-wire leased line. After 6 seconds of receiving no input, the modem goes off-hook and attempts to connect. LOCAL SERIAL PORT SPEED Type: Configuration Format: AT [cmds] $Bn [cmds] Description: Sets the speed that the modem will communicate with the DTE. Command Function $B75 Sets the serial port to 75bps. $B300 Sets the serial port to 300bps. $B600 Sets the serial port to 600bps. $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. LOCAL SERIAL PORT SPEED MATCHING Type: Configuration Format: AT [cmds] %Gn [cmds] Description: Selects whether the speed of the modem’s port will be changed to match the local serial port, or if the user must do it by hand. Command Function %G0 Speed changed automatically. %G1 User must change speed with %B command. LOCAL SERIAL PORT SPEED RESET Type: Configuration/Immediate Format: AT [cmds] %Un [cmds] Description: Selects when the speed of the serial port may change. Note: When the serial port speed is changed from 38.4Kbps, a %U command must be entered for the modem to recognize the new speed. Command Function %U0 Serial port speed may change at any time. Modem will automatically adjust. %U1 Modem will only adapt to serial port speed change when %U1 is entered. %U2 Serial port speed may change at any time. Modem will automatically adjust. LOGON SEQUENCE DISPLAY Type: Configuration Format: AT [cmds] $Vn [cmds] Description: Controls whether the modem displays the text of the logon sequence. Command Function $V0 Logon sequence not displayed. $V1 Logon sequence displayed. LOOPBACK TEST AND BUSY OUT CONFIGURATION Type: Configuration Format: AT [cmds] %Hn [cmds] Description: Controls the functions of serial port pins 18 and 21. Command Function %H0 Pins 18 and 21 have no function. %H1 Busy Out when pin 18 is high, perform local analog loopback test on high DTR. %H2 Perform local analog loopback test when pin 18 is high, remote digital loopback test when pin 21 is high. LOW DTR BUSY OUT TIMER Type: Register Format: AT [cmds] :T18=n [cmds] Default: 0 Range: 0 - 255 Unit: 1 second Description: Sets the amount of time that the modem waits after DTR has gone low to busy out the line. The modem does not busy out the line when :T18 is set to 0. MANUAL DIAL CONFIGURATION Type: Configuration Format: AT [cmds] :Dn [cmds] Description: Selects when the modem goes off-hook to accept a manually dialed call. Command Function :D0 Modem does not respond when DTR goes high. :D1 Modem goes off hook in originate mode when DTR goes high. :D2 Modem dials first stored number when DTR goes high or when Talk/Data button is pressed MNP10 1200BPS DISCONNECT Type: Register Format: AT [cmds] :T19=n [cmds] Description: Selects whether the modem will disconnect an idle 1200bps MNP10 connection. Command Function :T19=0 Modem will not disconnect an idle connection. :T19=1 Modem will disconnect an idle connection after 2 minutes. MNP10 FALLBACK Type: Configuration Format: AT [cmds] -Qn [cmds] Description: Allows MNP10 to fall back to speeds slower than 4800bps Command Function -Q0 MNP10 at 2400bps and 1200bps disabled. -Q1 MNP10 at 2400bps enabled. -Q2 MNP10 at 2400bps and 1200bps enabled. ORIGINATE/ANSWER MODE Type: Configuration Format: AT [cmds] $On [cmds] Description: Selects whether the modem will function in originate or answer mode. Command Function $O0 Originate/Answer button determines mode. $O1 Modem operates in originate mode. $O2 Modem operates in answer mode. PARALLEL PORT PACKET SIZE Type: Register Format: AT [cmds] :T29=n [cmds] Default: 32 Range: 0 - 63 Unit: 1 byte Description: Sets the size of packets sent over the parallel port. PARITY Type: Configuration Format: AT [cmds] -On [cmds] Description: Selects the serial parity that the modem will use. Command Function -O0 Modem will use seven data bits, odd parity. -O1 Modem will use seven data bits, even parity. -O2 Modem will use seven data bits, MARK parity. -O3 Modem will use seven data bits, SPACE parity. -O4 Modem will use eight data bits, no parity. -O5 Modem will use eight data bits, odd parity. -O6 Modem will use eight data bits, even parity. -O7 Modem will use eight data bits, MARK parity. POWER-UP DIAGNOSTICS Type: Immediate Format: AT [cmds] $D [cmds] Description: Performs power-up diagnostic routines. If SW1 and SW2 are all on, performs a reset and diagnostic routines. PULSES PER DIGIT Type: Configuration Format: AT [cmds] %Wn [cmds] Description: Sets the number of pulses per digit dialed while in pulse mode. Command Function %W0 Digit value is number of pulses generated (0 digit generates 10 pulses). %W1 Digit value plus one pulses generated (0 digit generates 1 pulse). %W2 Ten minus digit value pulses generated (0 digit generates 10 pulses). REMOTE CONFIGURATION Type: Configuration Format: AT [cmds] *En [cmds] Description: Selects whether a modem will accept requests for remote configuration. Command Function *E0 Remote configuration disabled. *E1 Remote configuration enabled. REMOTE CONFIGURATION CHARACTER Type: Configuration Format: AT [cmds] *Sn [cmds] Default: 42 Range: 0 - 126 Unit: 1 ASCII character Description: Defines the character that the *A command will send four times within the guard time set by S12 to notify the remote modem that a remote configuration session is requested. REMOTE CONFIGURATION BANNER Type: Configuration Format: AT [cmds] *I [cmds] Description: Sets the banner that the modem displays when a remote configuration session is begun. The user will be prompted to enter the banner, which can be no longer than 25 characters. REMOTE CONFIGURATION RECOVERY Type: Immediate Format: AT [cmds] *Q [cmds] Description: Recovers changes made during a remote configuration session that were not saved. REMOTE CONFIGURATION - REDUCE ACCESS Type: Immediate Format: AT [cmds] *X [cmds] Description: Removes a level of access during a remote configuration session. If the user has full access, it will be reduced to read-only; if at read-only, the session will be ended. REMOTE CONFIGURATION REQUEST Type: Immediate Format: AT [cmds] *A [cmds] Description: Requests to begin a remote configuration session with the remote modem. Note: The same function may be accomplished by sending the remote configuration character four times within the guard time set by register S12. REMOTE CONFIGURATION SAVE Type: Immediate Format: AT [cmds] *U [cmds] Description: Saves the changes that have been made to the remote configuration. REMOTE CONFIGURATION SECURITY Type: Configuration Format: AT [cmds] *Rn [cmds] Description: Selects whether remote configuration sessions are password protected. Command Function *R0 Remote configuration security disabled. *R1 Remote configuration security enabled. REMOTE CONFIGURATION SECURITY - FULL ACCESS REQUEST Type: Immediate Format: AT [cmds] *M [cmds] Description: Requests the remote modem to grant the user full configuration access. If remote configuration security is enabled, the user will be given three chances to enter the password. If this fails, full access will not be granted. REMOTE CONFIGURATION SECURITY - PASSWORD SELECTION Type: Configuration Format: AT [cmds] *Pn Description: Changes the passwords for remote configuration. The user will be prompted to enter the old and new passwords. Passwords must be exactly five characters, case insensitive. Command Function *P0 Sets the read-only remote configuration password. *P1 Sets the full access remote configuration password. RESULT CODES - MNP Type: Configuration Format: AT [cmds] -Mn [cmds] Description: Selects whether the modem will give MNP result codes. Command Function -M0 MNP result codes disabled. -M1 MNP result codes enabled. RI SIGNAL Type: Configuration Format: AT [cmds] \Rn [cmds] Description: Selects when the RI signal will be cleared from an incoming call. Command Function \R0 RI signal not cleared until the call has disconnected. \R1 RI signal cleared when call is answered. RING SIMULATION Type: Configuration Format: AT [cmds] :Rn [cmds] Description: Selects whether the modem simulates the ring signal an incoming call if the DSTR signal is low. Command Function :R0 Modem does not simulate a ring signal. :R1 Modem simulates ring on low DTR and if &D command is not set to 0. After 30 seconds if DTR does not go high, the modem "disconnects" the simulated call. If &D is set to 0 or the DTR signal is high, the modem attempts to connect immediately. SYNCHRONOUS RTS AND CTS SIGNALS Type: Configuration Format: AT [cmds] &Rn [cmds] Description: Controls the behaviour of the RTS and CTS signals. Command Function &R0 CTS follows RTS in data mode; RTS is ignored in command mode. &R1 CTS forced high, RTS is ignored. &R2 ITU-T V.13 used to simulate half-duplex modes on full-duplex connections. SECONDARY FLOW CONTROL Type: Configuration Format: AT [cmds] -Fn [cmds] Description: Selects whether the secondary flow control characters will be active. Command Function -F0 Secondary flow control disabled. -F1 Secondary flow control enabled. SECURITY - CLEAR PASSWORDS Type: Configuration Format: AT [cmds] $Jn [cmds] Description: Clears sections of the password lists. Command Function $J0 Clears the call password table and resets the logon sequences to their factory defaults. $J1 Clears all stored numbers, the call and connection password tables, and resets the logon sequences to their factory defaults. SECURITY - MAIN PASSWORD (ASYNCHRONOUS MODE) Type: Configuration Format: AT [cmds] $P [cmds] Description: Changes the main security password. The user will be prompted for the old and new passwords. Passwords must be exactly five characters, case insensitive. SECURITY - MAIN PASSWORD (SYNCHRONOUS MODE) Type: Configuration Format: AT [cmds] $Pxxxxx;yyyyy; [cmds] Description: Changes the main security password. The user will be prompted for the old and new passwords. The xxxxx represents the old password, and the yyyyy is the new password. Passwords must be exactly five characters, case insensitive. STORE COMPLETE ACTIVE PROFILE Type: Immediate Format: AT [cmds] *Wn [cmds] Description: Writes all the values for the active profile, including S-registers not normally saved, into the non-volatile RAM. Command Function *W0 Write the active profile to stored profile 0 *W1 Write the active profile to stored profile 1 *W2 Write the active profile to stored profile 2 *W3 Write the active profile to stored profile 3 STORE TELEPHONE NUMBER Type: Configuration Format: AT [cmds] \Pn<#> Description: Stores the telephone number indicated at memory location n. SWITCH CONFIGURATIONS Type: Configuration Format: AT [cmds] $Kn [cmds] Description: Selects whether the modem will use the configurations stored by SW1 and SW2. Command Function $K0 Switch configurations enabled. $K1 Switch configurations disabled. TALK/DATA MODE Type: Configuration Format: AT [cmds] $Tn [cmds] Description: Controls the function of the Talk/Data button and selects which mode the modem is in. Command Function $T0 Talk/Data button enabled. $T1 Talk/Data button disabled. $T2 Toggles talk/data mode. V.21 AND V.23 ANSWER TONE TIMER Type: Register Format: AT [cmds] :T3=n [cmds] Default: 33 Range: 0 - 33 Unit: .1 second Description: Sets the length of time the modem will send the V.21 and V.23 answer tone or wait after the answer tone is sent before attempting to complete the connection. V.21 NEGOTIATION TIMER Type: Register Format: AT [cmds] :T2=n [cmds] Default: 0 Range: 0 - 255 Unit: .1 second Description: Sets the amount of time the modem will attempt to make a V.21 connection before giving up and attempting a V.23 half-duplex connection. If this register is set to 0 the modem will not attempt to make a V.23 connection and disconnects instead. V.22, V.22bis, AND V.32 NEGOTIATION TIMER Type: Register Format: AT [cmds] :T0=n [cmds] Default: 40 Range: 0 - 255 Unit: .1 second Description: Sets the amount of time the modem will attempt to make a V.22, V.22bis, or V.32 connection before giving up and attempting a V.23 split speed connection. V.23 EQUALIZERS Type: Configuration Format: AT [cmds] %On [cmds] Description: Selects whether the modem will use equalizers when operating in V.23 half-duplex mode. Command Function %O0 V.23 equalizers disabled. %O1 V.23 equalizers enabled. V.23 HALF DUPLEX CARRIER TURNAROUND TIMER Type: Register Format: AT [cmds] :T4=n [cmds] Default: 20 Range: 0 - 255 Unit: 12.5 mS Description: Sets the amount of time that the modem waits for the remote modem to answer after lowering the carrier signal before it raises the carrier again and begins sending data. V.23 HALF DUPLEX DCD TIMER Type: Register Format: AT [cmds] :T6=n [cmds] Default: 200 Range: 0 - 255 Unit: 1 mS Description: Sets the amount of time the modem waits after carrier is raised before it watches for incoming data. V.23 HALF DUPLEX END-OF-BUFFER CARRIER TIMER Type: Register Format: AT [cmds] :T5=n [cmds] Default: 7 Range: 0 - 255 Unit: 12.5 mS Description: Sets the amount of time that the modem waits after emptying its transmit buffer before it lowers the carrier signal. V.23 HALF DUPLEX INACTIVE ANSWER TIMER Type: Register Format: AT [cmds] :T7=n [cmds] Default: 60 Range: 0 - 255 Unit: 1 second Description: Sets the amount time after a connection is made that if no data is received the modem will disconnect. V.23 SPLIT SPEED NEGOTIATION TIMER Type: Register Format: AT [cmds] :T1=n [cmds] Default: 30 Range: 0 - 255 Unit: .1 second Description: Sets the amount of time the modem will attempt to make a V.23 split speed connection before giving up and attempting a V.23 half-duplex or V.21 connection. If this register is set to 0 the modem will not attempt to make a V.23 connection. V.32 AND V.32bis TRAINING TIMER Type: Register Format: AT [cmds] :T17=n [cmds] Default: 0 Range: 0,1,5 - 32 Unit: Unidentified Description: Sets the amount of time that the modem lets a V.32 or V.32bis connection train before picking a speed. A setting of 0 is equivalent to a setting of 28. Longer training times reduce noise sensitivity. V.32 TRAINING ON CONNECTION Type: Register Format: AT [cmds] :T23=n [cmds] Description: Selects whether the modem performs a training sequence at the beginning of a V.32 connection. Command Function :T23=0 Modem does not perform training sequence. :T23=32 Modem performs training sequence. WORD LENGTH Type: Configuration Format: AT [cmds] -En [cmds] Description: Sets the number of bits the modems will use per data word. Command Function -E0 Use 10-bit words. -E1 Use 11-bit words. Proprietary V.25bis Command Set CLEAR STORED NUMBERS Type: Configuration Format: CLAnn Description: Clears stored number location nn. If no number is given, all memory locations are cleared. CONNECT Type: Result code Format: ONLnnnn Description: Reports that the modem has connected at nnnn bps. CONNECTING Type: Result code Format: CNX Description: Reports that the modem is attempting to connect. DISPLAY CONFIGURATION AND STATISTICS Type: Immediate Format: RS3 Description: Displays the settings of all commands and statistics about the current connection. HANG UP Type: Immediate Format: HUP Description: Commands the modem to go on hook. LOCAL SERIAL PORT SPEED Type: Configuration Format: CSPnn Description: Sets the speed that the modem will communicate with the DTE. Command Function CSP75 Sets the serial port to 75bps. CSP300 Sets the serial port to 300bps. CSP600 Sets the serial port to 600bps. CSP1200 Sets the serial port to 1200bps. CSP2400 Sets the serial port to 2400bps. CSP4800 Sets the serial port to 4800bps. CSP9600 Sets the serial port to 9600bps. CSP19200 Sets the serial port to 19.2Kbps. CSP38400 Sets the serial port to 38.4Kbps. CSP57600 Sets the serial port to 57.6Kbps. CSP115200 Sets the serial port to 115.2Kbps. OFF-LINE Type: Result code Format: OFL Description: Reports that the connection has been terminated. ON-LINE Type: Immediate Format: RDS Description: Instructs the modem to return to on-line state. REDIAL Type: Immediate Format: DLN Description: Redials the last number dialed. RESET Type: Immediate Format: ITN Description: Resets the modem to power-up defaults. STORE ACTIVE PROFILE Type: Immediate Format: PRC Description: Stores the active V.25bis profile in configuration 0. V.25bis STANDARD SELECTION Type: Configuration Format: AT@Bn Description: Selects which standard the V.25bis commands will follow. Command Function AT@B0 V.25bis result codes follow ITU-T Red Book. Only V.25bis dial modifiers supported. The only valid result codes are CFI, INC, INV, and VAL. AT@B1 V.25bis result codes follow ITU-T Blue Book. Only V.25bis dial modifiers supported. The only valid result codes are CFI, CNX, INC, INV, and VAL. AT@B2 All V.25bis result codes supported. Only V.25bis dial modifiers supported. AT@B4 V.25bis result codes follow ITU-T Red Book. Only AT dial modifiers supported. The only valid result codes are CFI, INC, INV, and VAL. AT@B5 V.25bis result codes follow ITU-T Blue Book. Only AT dial modifiers supported. The only valid result codes are CFI, CNX, INC, INV, and VAL. AT@B6 All V.25bis result codes supported. Only AT dial modifiers supported.