Reference Information

Conexant AT Commands (Advanced Users Only) (Continued)

Command (Conexant)

+DS=a,b,c,d Controls V.42 bis data compression function (b, c, and d are optional):

■a sets direction(s) of data compression function, seen by DTE: 0=negotiated, no compression; 3=both directions (default).

■b=0 specifies modem does not disconnect if V.42bis is not negotiated by remote modem as specified by a.

■c sets maximum number of dictionary entries (2048) that should be negotiated.

■d sets maximum string length (32 bytes) to be negotiated.

+DS44=a,b,

Controls V.44 data compression function (b, c, d, e, f, g, h, and i

c,d,e,f,g,h,i

are optional):

 

■ a sets direction(s) of data compression function, seen by

 

DTE: 0=negotiated, no compression; 1=transmit only;

 

2=receive only; 3=both directions (default).

 

■ b specifies whether modem disconnects if V.44 is

 

not negotiated by remote DCE as specified in a: 0=do not

 

disconnect (default), 1=disconnect.

 

■ c: 0=stream method (default), 1=packet method,

 

2=multi-packet method.

 

■ d (256 to 2048) sets maximum code words to be negotiated

 

in transmit direction (default=2048).

 

■ e (256 to 2048) sets maximum code words to be negotiated

 

in receive direction (default=2048).

 

■ f (32 to 255) sets maximum string length to be negotiated in

 

transmit direction (default=32).

 

■ g (32 to 255) sets maximum string length to be negotiated

 

in receive direction (default=32).

 

■ h (2048 to 4096) sets maximum size of history buffer to be

 

negotiated in transmit direction (default=4096).

 

■ i (2048 to 4096) sets maximum size of history buffer to be

 

negotiated in receive direction (default=4096).

7–4

Reference Guide