At+Cgsn Request Product Serial Number Identification (Imei) Identical To Gsn; At+Chup Hang Up Call - Siemens M20 Terminal Technical Description

Siemens Information and Communication Products
AT+CGSN Request product serial number identification (IMEI) identical to GSN
Test command Response
AT+CGSN=? OK
Execute command Response
AT+CGSN TA returns identification text for determination of the individual ME.
<sn> OK
Parameter
<sn>
Reference Note
GSM 07.07
See also "AT+GSN Request TA serial number identification"
AT+CHLD Call hold and multiparty
Test command Response
AT+CHLD=?
+CHLD: list of supported <n>s OK
Execute command Response
AT+CHLD=[<n>] 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:
OK
If error is related to ME functionality:
+CME ERROR: <err>
Parameter
<n>
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 Note
GSM 07.07
AT+CHUP Hang up call
Test command Response
AT+CHUP=? OK
Execute command Response
AT+CHUP OK/ERROR
All active calls and held calls are cleared down.
Reference Note
GSM 07.07
Version 8 dated 15.03.00
IMEI of the telephone (International Mobile station Equipment Identity)
the supplementary services are only applicable to teleservice 11 (Speech telephony).
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
AT command interface
.
A
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