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Chapter 1 – AT Commands, S-Registers and Result Codes
Multi-Tech Systems, Inc. SocketModem MT5634SMIxx Reference Guide (S000263C) 11
Command: Sr=n Set Register Value
Values: r = S-register number; n varies
Default: None
Description: Set value of register Sr to value of n, where n is entered in decimal format (e.g.,
S0=1).
Command: Sr? Read Register Value
Values: r = S-register number
Default: None
Description: Read value of register Sr and display it in 3-digit decimal form (e.g., S2? gives the
response 043).
Command: T Tone Dialing
Values: P, T
Default: T
Description: Configures the modem for DTMF (touch-tone) dialing. Dialed digits are tone dialed
until a P command or dial modifier is received.
Command: Vn Result Code Format
Values: n = 0 or 1
Default: 1
Description: V0 Displays result codes as digits (terse response).
V1 Displays result codes as words (verbose response).
Command: Wn Result Code Options
Values: n = 0, 1, or 2
Default: 2
Description: W0 CONNECT result code reports serial port speed, disables protocol result
codes.
W1 CONNECT result code reports serial port speed, enables protocol result
codes.
W2 CONNECT result code reports line speed, enables protocol result codes.
Command: Xn Result Code Selection
Values: n = 0–7
Default: 4
Description: X0 Basic result codes (CONNECT); does not look for dial tone or busy signal.
X1 Extended result codes (CONNECT 46000 V42bis); does not look for dial tone
or busy signal.
X2 Extended result codes with NO DIALTONE; does not look for busy signal.
X3 Extended result codes with BUSY; does not look for dial tone.
X4 Extended result codes with NO DIALTONE and BUSY.
X5 Extended result codes with NO DIALTONE and BUSY.
X6 Extended result codes with NO DIALTONE and BUSY.
X7 Basic result codes with NO DIALTONE and BUSY.
Command: Zn Modem Reset
Values: n = 0 or 1
Default: None
Description: Z0 Reset modem to profile saved by the last &W command.
Z1 Same as Z0.