Appendix C - AT Command Summary

 

 

 

$SBn

n = speed

$SB300 selects 300 bps at serial port.

 

 

$SB1200 selects 1200 bps at serial port.

 

 

$SB2400 selects 2400 bps at serial port.

 

 

$SB4800 selects 4800 bps at serial port.

 

 

$SB9600 selects 9600 bps at serial port.

 

 

$SB19200 selects 19,200 bps at serial port.

 

 

$SB38400 selects 38,400 bps at serial port.

 

 

* $SB57600 selects 57600 bps at serial port.

 

 

$SB115200 selects 115200 bps at serial port.

&SFn

n = 0 or 1

* &SF0 selects DSR follows CD.

 

 

&SF1 selects DSR independent.

&Sn

n = 0, 1 or 2

&S0 forces Data Set Ready On.

 

 

* &S1 lets Data Set Ready act normally.

 

 

&S2 Data Set Ready drop is regulated by S24 on

 

 

disconnect.

$SPn

n = 0 or 1

* $SP0 disables UUCP Spoofing

 

 

$SP1 enables UUCP Spoofing

T

 

Modem will tone-dial numbers following the T.

&Tn

n = 4 or 5

&T4 means Enable Response to Request for

 

 

Remote Digital Loopback.

 

 

* &T5 means Disable Response to Request for

 

 

Remote Digital Loopback.

#Tn

n = 0 or 1

#T0 turns off Trellis Coded Modulation

 

 

* #T1 turns on Trellis Coded Modulation

Un

n = 0, 1, 2, or 3

U0 places modem in Analog Loop Originate Mode.

 

 

U1 places modem in Analog Loop Answer Mode.

 

 

U2 places modem in Remote Digital Loopback test

 

 

mode.

 

 

U3 places modem in Local Digital Loopback test

 

 

mode.

$VDn

n= 0 or 1

* $VD0 disables Voice/Data Dialing

 

 

$VD1 enables Voice/Data Dialing

Vn

n = 0 or 1

V0 means Result Codes sent as digits (terse

 

 

response).

 

 

* V1 means Result Codes sent as words (verbose

 

 

response).

W

 

Wait for new dial-tone.

&Wn

n = 0 or 1

&W0 causes modem to store its current parameters

 

 

in non-volatile RAM, and modem will load these for

 

 

future sessions instead of reading factory ROM

 

 

defaults, unless &F command used.

 

 

* &W1 causes modem to not store parameters.

*Factory Default

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Multi-Tech Systems MT2834BL manual $SBn, Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 103