Motorola g20 Developer's Manual page 84

AT Commands Reference
Table 22. +CHLD Actions According to Call State and Operation (Continued)
Call State
0 -Release
Held Call
MTPY Error 3.
Active Call
Incoming
Call (RING)
Single Releases
Active Call waiting call.
and Waiting
Call
MTPY Releases
Active Call waiting call.
and Waiting
Call
Single Held Releases held
Call or call.
MTPY Held
Call
Single (or Releases held
MTPY) call.
Active Call
and Single
(or MTPY)
Held Call
Held (Single Releases
or MTPY) waiting call.
Call and
Waiting Call
Single (or Releases
MTPY) waiting call.
Active Call
and Single
(or MTPY)
Held and
Waiting Call
70
CHLD <operation>
1 - Release 1x - Release
Active Call, Active Call x
Accept Held from MTPY
Call Call
Releases Releases
active call. specific
active call x.
If x does not
exist, then
error 22.
Releases If x=1
active call, releases
accepts active call,
waiting call. otherwise
error 22.
Releases Releases
active call, specific
accepts active call x.
waiting call. If x does not
exist, then
error 22.
Accepts held Error 3.
call.
Releases Releases
active call and specific
accepts held active call x.
call. If x does not
exist, then
error 22.
Accepts Error 3.
waiting call.
Releases Releases
active call, specific
and accepts active call x.
waiting call. If x does not
exist, then
error 22.
2 - Switch
Between
Held and
Active Call
Puts active Split. If call x
call on hold. does not
exist, then
error 22.
Error 3.
Puts active Error 3.
call on hold,
accepts
waiting call.
Puts active Split. If x
call on hold does not
and accepts exist, then
waiting call. error 22.
Accepts held Error 3.
call.
Switches. Error 3.
Accepts Error 3.
waiting call.
Error 3 (too Error 3.
many calls
on hold.
2x - Active
MTPY Call 3 - Add
to Hold, Held Call to
Except for Active Call
Call x
Error 3.
Error 3.
Error 3.
Error 3.
Makes a
conference
call.
Error 3.
Makes a
conference
call. Waiting
call is not
touched.
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