Cinterion
®
EHS6 AT Command Set
9.7 AT+CHLD
EHS6_ATC_V03.001
15/12/3
Confidential / Released
Page 210 of 513
4
Connect the two calls of a multiparty call and disconnects the subscriber from
both calls (ECT).
6
Put an active call on hold or a held call to active, while another call is waiting.
7
Disconnect users in multiparty without accepting incoming call.
8
Release all calls.
Notes
• The
command offers a broad range of options according to 3GPP Technical Specifications. How-
ever, if you attempt to invoke an option which is not provisioned by the network, or not subscribed to, invoca-
tion of this option will fail. The responses in these cases may vary with the network (for example "Operation
not allowed", "Operation not supported" etc.).
• The handling of the supplementary service Call hold and Multiparty varies with the types of calls. This is
because only voice calls can be put on hold, while data calls cannot. The following procedures apply: With
=2 the user can simultaneously place a voice call on hold and accept another waiting voice or data
call. If the waiting call is a data call, it is also possible to put the voice call on hold. The user needs to wait for
the RING signal and manually answer the data call with
. To switch back from the active data call to the
held voice call the active call must be terminated with
=1. If all active and held calls are voice calls
it is possible to switch back and forth with
• In conflict situations, e.g. when a waiting call comes while there are already held calls, the above procedures
apply to the waiting call only. For example,
=0 rejects the waiting call, but does not affect the held calls.
• See also the
command for details on how to display waiting calls.
Example
at+cpin="9999"
OK
+CREG: 2
+CREG: 1,"0145","0016"
The mobile is now registered.
at+ccwa=1,1,1
You activate the indication of waiting calls during
voice calls.
OK
atd"03038639268";
You make a voice call.
OK
+CCWA: "+491791292364",145,32,,0
You receive a URC indicating a waiting data call.
at+chld=2
You put the voice call on hold.
OK
RING
You now receive the RING of the data call.
RING
RING
ATA
You accept the data call.
OK
CONNECT 9600/RLP
The data connection is set up.
hello
+++
With ''+++'' you go in command mode.
OK
at+clcc
You interrogate the status of all established calls.
+CLCC: 1,0,1,0,0,"03038639268",129
+CLCC: 2,1,0,1,0,"+491791292364",145
OK
at+chld=1
The active data call is terminated and the held voice
call becomes active.
OK
at+clcc
+CLCC: 1,0,0,0,0,"03038639268",129
OK