Reference Information

Modem Reference Information

Command

Function (Conexant)

+MS=a,b,c,d,e,f

Select modulation (b, c, d, e, and f are optional).

 

a is the carrier (allowable rates in parentheses): B103 (300), B212 (1200 Rx/75 Tx or 75 Rx/1200 Tx),

 

V21 (300), V22 (1200), V22B (1200/2400), V23C (1200), V32 (4800/9600), V32B (4800–14400), V34

 

(2400–33600), K56 (32000–56000), V90 (28000–56000), V92 (downstream: 28000–56000; upstream:

 

24000–48000).

 

b is automode: 0=disabled, 1=enabled (default).

 

c is minimum transmit (Tx) rate (bps).

 

d is maximum transmit rate (bps).

 

e is minimum receive (Rx) rate.

 

f is maximum receive rate (bps).

+WS=n

Set PDC mode: 1=disable (default), 20=enable.

ECC Commands

%Cn

+EB=a,b,c

+EFCS=0

+ER: a

+ER=n

+ES=a,b,c

+ESR=0

+ETBM=a,b,c

Set data compression: 0=disable, 1=enable V.42 bis and MNP 5, 2=enable V.42 bis and MNP 5, 3=enable V.42 bis and MNP 5 (default).

Select break handling (b and c are optional): a=0 — break is ignored.

b=0 — transmitted V.42 L-SIGNAL will not indicate break signal length. c=0 — break is not delivered to DTE.

Select 16-bit FCS specified in V.42.

Select error control protocol: NONE=error control not in use, LAPM=V.42 LAPM protocol, ALT=MNP.

Error control reporting: 0=disable, 1=enable.

Select error control and synchronous mode (b and c are optional).

a is requested mode when modem is originator: 0=initiate call with direct mode, 1=initiate call with normal mode, 2=initiate V.42 without detection phase, 3=initiate V.42 with detection phase (default), 4=initiate MNP, 6=initiate V.80 synchronous access mode when connection is completed.

b specifies fallback mode when modem is originator: 0=LAPM, MNP, or normal mode error control optional (default); 1=LAPM, MNP, or direct mode error control optional; 2=LAPM or MNP error control required; 3=LAPM error control required; 4=MNP error control required.

c specifies fallback mode when modem is answerer or specifies V.80 synchronous access mode: 1=error control disabled, use normal mode; 2=LAPM, MNP, or normal mode error control optional (default); 3=LAPM, MNP, or direct mode error control optional; 4=LAPM or MNP error control required; 5=LAPM error control required; 6=MNP error control required; 8=initiate V.80 synchronous access mode when connection complete.

Disable selective repeat option in V.42.

Handle data remaining in modem buffers on call termination (b and c are optional): a=0 — disconnect occurs immediately and buffered transmit data is discarded. b=0 — disconnect occurs immediately and buffered receive data is discarded. c=0 — modem does not attempt to deliver buffered data and discards data.

FAX Class 1

+FAE=n

+FAR=n

+FCL=n

+FCLASS=n

+FIT=n,a

+FLO=a

Data/fax auto answer: 0=disable (default), 1=enable.

0=disable adaptive reception (default), 1=enable.

Set loss-of-carrier delay in units of 100 ms (n=0 to 255).

Set active service class: 0=data mode (default), 1=Fax Class 1, 1.0=Fax Class 1.0 mode, 8=voice mode.

Set DTE inactivity timeout n seconds after which modem goes on-hook (a=0) or DCE goes on hook (a=1).

Set flow control type: 0=XON/XOFF and RTS/CTS flow control turned off; 1=XON/XOFF flow control in either direction; 2=RTS for flow control of modem by DTE, and CTS for flow control of DTE by modem.

142 Reference Guide