WTI Part No.: 13133 Rev. A SRM-100 Secure Rack Modem AT Command Reference Guide; Multi-Tech Format Modems 5 Sterling · Irvine · California 92618-2517 (949) 586-9950 · Toll Free: 1-800-854-7226 Fax: (949) 583-9514 · http://www.wti.
Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 2. Communicating with the Internal Modem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 3. AT Command Set. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 4. S-Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 5. Modem Result Codes . . . . . . . . . . . . . . .
1. Introduction The SRM-100 Secure Rack Modem is designed for applications that require secure, dial-up access to console ports on rack mounted equipment. WTI's Secure Rack Modem can recognize up to 100 passwords, track activity for each password and create a log record of successful and/or unsuccessful access attempts. In addition to the SRM's Menu Driven configuration functions, the internal modem will also accept AT commands.
2. Communicating with the Internal Modem In order to invoke AT commands manually, you must communicate directly with the SRM's internal modem. The Modem Command mode is only available via the Console Port or the serial modem port; inbound callers cannot communicate directly with the modem. To send AT commands to the SRM's internal modem proceed as follows: 1. Via Console Port: Access the SRM command Mode as described in the Section 5.1.1. In the SRM-100 User's Guide.
3. AT Command Set This section describes the AT command set. Note the following: · Type commands in either upper or lower case. Do not use a combination of upper and lower case characters. · Use the Backspace key to delete errors. · All commands begin with the AT prefix, and are invoked by pressing [Enter] (Carriage Return). The only exceptions are the A/ command (Repeat previous command) and +++ (Exit to on-line command mode). · The maximum command length is 40 characters.
SRM-100 - AT Command Reference Guide; Multi-Tech Format Command Bn Function/Options CCITT Mode / Bell Mode * B0 V.21 for 300 bps operation (CCITT Mode). B1 300 bps operation (Bell Mode). $BAn Speed Conversion * $BA0 Enable Speed Conversion (Baud Adjust Off). $BA1 Disable Speed Conversion (Baud Adjust On). &Cn Data Carrier Detect (DCD) Signal. &C0 Forced DCD signal ON. * &C1 Normal DCD operation (required by most software). &C2 DCD drops upon disconnect (follows Register S24).
SRM-100 - AT Command Reference Guide; Multi-Tech Format Command AT Command Set Function/Options $EBn Eleven Bit Mode. * $EB0 Disable 11 bit mode. $EB1 Enable 11 bit mode. &En Error Correction / Flow Control. &E0 No Error Correction. * &E1 V.42 Auto-reliable mode. &E2 V.42 Reliable mode. &E3 No modem-initiated flow control. * &E4 CTS/RTS modem-initiated flow control. &E5 XON/XOFF modem initiated flow control. * &E6 Disable XON/XOFF pass-through. &E7 Enable XON/XOFF pass-through.
SRM-100 - AT Command Reference Guide; Multi-Tech Format Command &Gn AT Command Set Function/Options Guard Tone. * &G0 Disable CCITT guard tones. &G1 Enable CCITT 550 Hz guard tone (international). &G2 Enable CCITT 1800 Hz guard tone (international). Hn Disconnect (Hang Up). H0 Hangs up (goes on hook). H1 Goes off hook. $Hn Help Screen. $H1 Help Screen #1. $H2 Help Screen #2. $H3 Help Screen #3. In Modem Identification. I0 Request modem ID number. I1 Request firmware revision number.
SRM-100 - AT Command Reference Guide; Multi-Tech Format Command AT Command Set Function/Options $MBn Modem (Telco Port) Baud Rate. $MB75 CCITT V.23 mode. $MB300 300 bps on-line. $MB1200 1200 bps on-line. $MB2400 2400 bps on-line. $MB4800 4800 bps on-line. $MB9600 9600 bps on-line. $MB14400 14,400 bps on-line. $MB19200 19,200 bps on-line. $MB28800 28,800 bps on-line. * $MB33600 33,600 bps on-line. &M0 Asynchronous Mode.
SRM-100 - AT Command Reference Guide; Multi-Tech Format Command $Rn AT Command Set Function/Options Retransmit. * $R0 $R1 Disconnect after 12 retransmits in Reliable Mode. Unlimited retransmits in Reliable Mode. &RFn Clear to Send (CTS) and Request to Send (RTS) Signals. &RF0 CTS follows RTS. * &RF1 CTS functions independently from RTS. Sr=n Sets S-Register "r" to the value "n", where "n" is entered in decimal format.
SRM-100 - AT Command Reference Guide; Multi-Tech Format Command &Wn AT Command Set Function/Options Save Modem Parameters. &W0 Instructs modem to save current parameters in nonvolatile RAM. The modem will load these parameters for future sessions instead of reading factory ROM defaults (unless the &F command is issued). * &W1 Instructs modem to not save parameters to RAM. Xn Extended Result Codes. * X0 Basic Result Codes (CONNECT). X1 Extended Result Codes (CONNECT 9600).
4. S-Registers The S-Registers are used to store modem configuration parameters, display modem status, and initiate modem test and diagnostic functions. In order to invoke commands to change or display the contents of the S-Registers, you must first access the modem command mode as described in Section 2. Note the following: · View Status Screen: To display the modem status screen, which lists the current values assigned to most S-Registers, type ATL6 and press [Enter].
SRM-100 - AT Command Reference Guide; Multi-Tech Format S-Registers Register Range Default Function S11 1 - 255 70 Tone Dialing; Tone Spacing and Duration. Sets the duration and spacing (in milliseconds) between DTMF (touch tone) dialing characters. S12 to S16 --- --- Not Used. S17 0 - 250 250 Change Break Time. Defines the break time (space) (in 10 Ms increments) to local PC. S18 to S23 --- --- Not Used. S24 0 - 255 20 PBX/CBX Disconnect Drop Time for DSR/CTS/DCD.
5. Modem Result Codes When AT commands are invoked, the modem will respond with either Terse (numeric) or Verbose (text) result codes. The result code format is set using the Modem Parameters Menu (/M), or the ATVn command. Result Codes can also be completely suppressed by enabling the Quiet Mode via the Modem Parameters Menu or the ATQn command.
SRM-100 - AT Command Reference Guide; Multi-Tech Format Modem Result Codes Customer Service Customer Service hours are from 8:00 AM to 5:00 PM, PST, Monday through Friday. When calling, please be prepared to give the name and make of the unit, its serial number and a description of its symptoms. If the unit should need to be returned for factory repair it must be accompanied by a Return Authorization number from Customer Service.
