At+Cgsn Request Product Serial Number Identification (Imei) Identical To Gsn; At+Chld Call Hold And Multiparty - Siemens MC35 Command Set

AT Command Set
4.15 AT+CGSN Request product serial number identification (IMEI) identical
to GSN
Test command Response
OK
AT+CGSN=?
Execute command Response
AT+CGSN TA returns identification text for determination of the individual ME.
<sn> OK
Parameter
<sn> IMEI of the telephone (International Mobile station Equipment Identity)
Reference Note
GSM 07.07 See also "AT+GSN Request TA serial number identification".

4.16 AT+CHLD Call hold and multiparty

Test command Response
+CHLD: (list of supported <n>s)
AT+CHLD=?
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.
OK
If error is related to ME functionality:
+CME ERROR: <err>
Parameter
<n>
Reference Note
· This supplementary service is only applicable to teleservice 11 (Speech te-
GSM 07.07
· The AT+CHLD command offers a broad range of options according to the
· In conflicting situations, e.g. when a waiting call comes while there are already
MC35_ATC_01_V05.00
0 Terminate all held calls; or set UDUB (User Determined User
Busy) for a waiting call, i.e. reject the waiting call.
1 Terminate all active calls (if any) and accept the other call
(waiting call or held call)
1X Terminate the active call 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
lephony). It is neither possible to put a data or fax call on hold, nor to switch
from a voice call to a waiting data or fax call.
The classes of waiting calls can be easily distinguished if the URC +CCWA:
<number>,<type>,<class>,,<CLI validity> is enabled. See AT+CCWA in
Chapter 4.9.
GSM specifications. However, many of these options are dependent on the
SIM card / service provider.
held calls, the above procedures apply to the waiting call only. For example,
<n>=0 rejects the waiting call, but does not affect the held calls.
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