Hi.
I'm trying to deal with a problem regarding putting a call on hold and then
later resuming it. I am using chan_sip throughout, and Asterisk 16.
I have two scenarios:
First (works):
1. An inbound call arrives, the dialplan does not Answer() it.
2. The dialplan performs a Dial() to an external number, and when that gets
answered, Asterisk automatically bridges the two channels together. The
Dial() command includes an F() parameter to call a subroutine when the call
ends.
3. In this case I get channel names such as SIP/Trunkname-00002ab6 and
SIP/Trunkname-00002ab7
4. I can then put those channels on hold using the ChannelRedirect() command.
5. I can later resume the conversation (join the channels back together) with
the Bridge() command.
Second (doesn't work):
1. An Originate command (AMI) is used to tell Asterisk to Dial() out to an
external number, and the call gets answered.
2. The dialplan then Dial()s out to a second external number, and when that is
answered, Asterisk automatically bridges the channels together. The second
Dial() command also contains an F() parameter to call a subroutine when the
call ends.
3. In this case I get channel names such as Local/number@context-00000ce9;2
for the first call and SIP/Trunkname-00002b52 for the second call.
4. When I then put those channels on hold using the ChannelRedirect() command,
the calls are placed on hold, and then the F() parameter hangup handler is
immediately called and the calls end.
The main thing which is puzzling me about this is that I see examples of both
Local/number@context-00000ce9;1 and Local/number@context-00000ce9;2 during the
processing of the calls.
What is the significance of the number following the semi-colon?
I also see in verbose logging output:
[2022-09-07 09:37:57.310706] pbx VERBOSE[29148]: dial.c:598 in handle_frame:
Local/number@context-00000ce9;1 answered
[2022-09-07 09:37:57.310792] pbx VERBOSE[29155][C-00001265]:
bridge_channel.c:2252 in bridge_channel_internal_push_full: Channel
SIP/Trunkname-00002b55 joined 'simple_bridge' basic-bridge <7e260e93-
abd4-48ea-96f1-33601165dba2>
[2022-09-07 09:37:57.310937] pbx VERBOSE[29149][C-00001265]:
bridge_channel.c:2252 in bridge_channel_internal_push_full: Channel
Local/number@context-00000ce9;2 joined 'simple_bridge' basic-bridge <7e260e93-
abd4-48ea-96f1-33601165dba2>
So, when the channel Local/number@context-00000ce9;1 gets answered, the result
is to bridge the channels Local/number@context-00000ce9;2 and
SIP/Trunkname-00002b55
So, is Local/number@context-00000ce9;1 some sort of "controlling channel" and
I should be using this as the parameter to the ChannelRedirect() command, or
is Local/number@context-00000ce9;2 the "real channel" which is bridged to the
other call, in which case why does the hangup handler get called when I use
ChannelRedirect() on this?
Maybe I should only be using Local/number@context-00000ce9 with no semicolon
suffix in the ChannelRedirect()?
Any advice / guidance / explanation / pointers to documentation welcome :)
Thanks,
--
These clients are often infected by viruses or other malware and need to be
fixed. If not, the user at that client needs to be fixed...
- Henrik Nordstrom, on Squid users' mailing list
Please reply to the list;
please *don't* CC me.
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