Specifications

AT command set for S45 Siemens mobile phones and modems
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Siemens Document No.: A30880-A10-A001-3-D376
Revision: 1.8
Revision Date: 30. November.2001
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2.3.3.4 AT+CHLD
AT+CHLD
Call hold and multiparty
Test command
AT+CHLD=?
Response
+CHLD: (list of supported <n>s)
OK/ERROR/+CME ERROR
Write command
AT+CHLD=[<n>]
Parameter
<n>
0
Terminates all held calls or sets UDUB (User
Determined User Busy) for a waiting call
1
Terminates all active calls (if there are any) and accepts
the other call (waiting call or held call)
1<x>
Terminates call number <x> (x= 1-7)
2
Puts all active calls on hold (if there are any) and
accepts the other call (waiting call or held call) as active
2<x>
Puts all active calls except call X (X= 1-7) on hold (split
3
Connects the call put on hold to the active call
multiparty
In conflict situations, the action is always applied to the waiting
call.
For terminating: Use the ”AT+CHUP” command to terminate all calls except
waiting calls
Note:
The scope of this command depends on the SIM clearing
and/or on the network support
Response
OK/ERROR/+CME ERROR