Siemens M20 Terminal User Manual

AT command interface
Version 8 dated 15.03.00 64
Siemens Information and Communication Products
A
AT+CGSN Request product serial number identification (IMEI) identical to GSN
Test command
AT+CGSN=?
Response
OK
Execute command
AT+CGSN
Response
TA returns identification text for determination of the individual ME.
<sn> OK
Parameter
<sn> IMEI of the telephone (International Mobile station Equipment Identity)
Reference
GSM 07.07
Note
See also “AT+GSN Request TA serial number identification”.
AT+CHLD Call hold and multiparty
Test command
AT+CHLD=?
Response
+CHLD: list of supported <n>s OK
Execute command
AT+CHLD=[<n>]
Response
TA controls the supplementary services Call Hold, MultiParty and Explicit Call Transfer. Calls can
be put on hold, recovered, released, added to conversation, and transferred.
Note:
the supplementary services are only applicable to teleservice 11 (Speech telephony).
OK
If error is related to ME functionality:
+CME ERROR: <err>
Parameter
<n> 0 Terminate all held calls or UDUB (User Determined User Busy)
for a waiting call
1 Terminate all active calls (if any) and accept the other call
(waiting call or held call)
1X Terminate the active call number X (X= 1-7)
2 Place all active calls on hold (if any) and accept the other call
(waiting call or held call) as the active call
2X Place all active calls except call X (X= 1-7) on hold
3 Add the held call to the active calls
Note:
1) Where both are held and a waiting call exists, the above procedures shall apply to the waiting
call (i.e. not to the held call) in conflicting situation.
2) The full amount of the functions described above depends on the network supplier.
Reference
GSM 07.07
Note
AT+CHUP Hang up call
Test command
AT+CHUP=?
Response
OK
Execute command
AT+CHUP
Response
OK/ERROR
All active calls and held calls are cleared down.
Reference
GSM 07.07
Note

Siemens M20 Terminal Specifications

General

Brand	Siemens
Model	M20 Terminal
Category	Engine
Language	English