![](/images/new-backgrounds/1153201/153201225x1.webp)
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, |
| |
| ■ 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). |
Reference Guide |