Siemens M20 Terminal User Manual

AT command interface
Version 8 dated 15.03.00 48
Siemens Information and Communication Products
A
AT+DS V.42bis data compression control
Test command
AT+DS=?
Response
+DS: (list of supported <p0>s), (list of supported <n>s), (list of supported <p1>s), (list of suppor-
ted <p2>s) OK
Parameter
see set command
Read command
AT+DS?
Response
+DR: <p0>,<n>,<p1>,<p2> OK
Parameter
see set command
Set command
AT+DS=[<p0>[,<
n>[,<p1>[,<p2>]]]]
Response
This parameter setting determines the possible data compression mode by TA at the compression
negotiation with the remote TA after call setup.
Note1
: only for data call
Note2
: GSM transmits the data transparent. The remote TA may support this compression.
OK
Parameter
Note: see also ITU V.42bis
<p0> 0 NONE
1 transmit only
2 receive only
3
both directions, but allow negotiation
<n> 0
allow negotiation of p0 down
1 do not allow negotiation of p0 – disconnect on difference
<p1> 512
-1024 dictionary size
Note:
default determined by manufacturer
<p2> 6
-64 maximum string size
Reference
V.25ter
Note
Functionality depends on network
AT+GCAP Request complete TA capabilities list
Test command
AT+GCAP=?
Response
OK
Parameter
Execute command
AT+GCAP
Response
TA reports a list of additional capabilities.
+GCAP: <name>
OK
Parameter
<name> e.g.: +CGSM, +FCLASS, +DS, +DR
Reference
V.25ter
Note

Siemens M20 Terminal Specifications

General

Brand	Siemens
Model	M20 Terminal
Category	Engine
Language	English