[asterisk-bugs] [JIRA] (ASTERISK-27833) hangup handlers sometimes called on answer and not on hangup (depending on usage of local channels, bridge, originate, mixmonitor)
Richard Mudgett (JIRA)
noreply at issues.asterisk.org
Tue May 29 15:39:54 CDT 2018
[ https://issues.asterisk.org/jira/browse/ASTERISK-27833?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=243588#comment-243588 ]
Richard Mudgett commented on ASTERISK-27833:
--------------------------------------------
I am not seeing any bugs in this issue. Asterisk is behaving as expected.
{quote}
I am seeing these errors/facts:
- In scenario 1, after_bridge_goto is not called at all
- In scenario 1, hangup_handler_push is called immediately after the Bridge command
- In scenario 1, h extension is not called at all
- In scenario 1, for some reason, the Beep command can not be played on one of the channels
- In scenario 2, after_bridge is ok
- In scenario 2, hangup_handler_push is ok
- In scenario 2, h extension is ok
- In scenario 2, mixmonitor file is too long and contains no audio except the beep
- In scenario 3, after_bridge is ok
- In scenario 3, hangup_handler_push is ok
- In scenario 3, h extension is ok
- In scenario 3, mixmonitor file is ok
{quote}
In scenario 1
- The after_bridge_goto does not execute because the local channel you attached it to optimized out and hung up as a result.
- You attached the hangup handler to the optimizing local channel that optimized itself out of the call when the call answered. Thus it optimized out, hung up, and executed the hangup handler you attached to it.
- The h exten was run on the optimized out local channel that hung up. I cannot say anything about which PJSIP channel you expected to execute the h exten but there is likely no h exten in the context where the non-local channels last executed dialplan.
- I cannot say why the beep didn't play other than local channels assume the codecs of the initiating channel. If they haven't been determined yet then the local channel has all codecs available.
In scenario 2
- You still have the after_bridge_goto and hangup handler associated with the local channel.
- The mixmonitor you attached to the local channel prevents the local channel from optimizing out. Thus things executed as you expected but not for the reasons you thought.
- I don't know why the mixmonitor file is "large". Did you take awhile to hanging up the call?
The simplified examples you added on May 12, 2018 are showing the same thing.
In the first log fragment you attach the hangup handlers \[1] to optimizing local channels that optimize themselves out of the call. An optimizing local channel will extract itself from a call when the call is answered and it is not prevented from optimizing out. Any state you have associated with the local channel will also disappear when the local channel optimizes out.
In the second log fragment, the "parent" channel is prevented from optimizing out because you attached MixMonitor. The child hangup handler is executing because the "child" local channel is able to optimize itself out.
In the third log fragment the "parent" channel is not a local channel but a channel to outside asterisk so it must stay around for the entire call. The "child" channel is still a local channel.
Your dialplan is written assuming that local channels will not optimize themselves out when you have not used the {{/n}} local channel modifier. You need to read about local channels \[2]. You especially need to understand local channel optimization and the local channel modifiers available. I'd also recommend reading the Asterisk book \[3].
\[1] https://wiki.asterisk.org/wiki/display/AST/Hangup+Handlers
\[2] https://wiki.asterisk.org/wiki/display/AST/Local+Channel
\[3] Asterisk: The Definitive Guide, 4th Edition (ISBN 1-4493-3242-0) available at http://oreilly.com/catalog/0636920025894 - Asterisk: The Definitive Guide is released under a Creative Commons License (http://creativecommons.org/licenses/by-nc-nd/3.0/us/) and a version is available for reading online at http://www.asteriskdocs.org/
> hangup handlers sometimes called on answer and not on hangup (depending on usage of local channels, bridge, originate, mixmonitor)
> ----------------------------------------------------------------------------------------------------------------------------------
>
> Key: ASTERISK-27833
> URL: https://issues.asterisk.org/jira/browse/ASTERISK-27833
> Project: Asterisk
> Issue Type: Bug
> Security Level: None
> Components: Core/Bridging
> Affects Versions: 15.3.0
> Environment: Fedora 27, probably all
> Reporter: Frederic Steinfels
> Assignee: Unassigned
> Labels: pjsip
> Attachments: scenario2 20180502-002816-29-28.wav, scenario3 20180502-003400-29-28.wav
>
>
> The behaviour of the bridge command is different depending on wheter MixMonitor is used. MixMonitor itself does not work if used before the PlayBack(beep) command. MixMonitor works if used after the PlayBack command.
> Scenario 1: Bridge command without MixMonitor
> {noformat}
> exten => s,1001,Set(CALLEDNUM=${SHARED(connecttocid)})
> exten => s,1002,agi(googletts.agi,"Sie werden mit ${ADMIN-${SHARED(connecttoadminid)}-spokenfname} ${ADMIN-${SHARED(connecttoadminid)}-spokenlname} verbunden.",de,,1.4)
> exten => s,1003,Set(CHANNEL(hangup_handler_push)=logoutemployee,s,1(hangup_handler))
> exten => s,1004,Set(CHANNEL(after_bridge_goto)=logoutemployee,s,1(after_bridge))
> exten => s,1005,Playback(beep)
> exten => s,1006,Noop()
> exten => s,1007,Bridge(${SHARED(connecttochannel)},p)
> exten => h,1,Noop(in hangup)
> {noformat}
> This will happen:
> {noformat}
> -- Executing [s at newanswer:1001] Set("Local/69 at default-000000b8;2", "CALLEDNUM=28") in new stack
> -- Executing [s at newanswer:1002] AGI("Local/69 at default-000000b8;2", "googletts.agi,"Sie werden mit Frédéric Steinfels verbunden.",de,,1.4") in new stack
> -- Launched AGI Script /var/lib/asterisk/agi-bin/googletts.agi
> == Spawn extension (local-sccp-call, s, 14) exited non-zero on 'Local/22 at default-000000b9;2'
> -- <Local/69 at default-000000b8;2> Playing '/data/Telefon/googletts//9c3c06da9e11b5448585f24c9285641b.1.4.slin16' (escape_digits=) (sample_offset 0) (language 'en')
> -- <Local/69 at default-000000b8;2>AGI Script googletts.agi completed, returning 0
> -- Executing [s at newanswer:1003] Set("Local/69 at default-000000b8;2", "CHANNEL(hangup_handler_push)=logoutemployee,s,1(hangup_handler)") in new stack
> -- Executing [s at newanswer:1004] Set("Local/69 at default-000000b8;2", "CHANNEL(after_bridge_goto)=logoutemployee,s,1(after_bridge)") in new stack
> -- Executing [s at newanswer:1005] Playback("Local/69 at default-000000b8;2", "beep") in new stack
> -- <Local/69 at default-000000b8;2> Playing 'beep.gsm' (language 'en')
> -- Executing [s at newanswer:1006] NoOp("Local/69 at default-000000b8;2", "") in new stack
> -- Executing [s at newanswer:1007] Bridge("Local/69 at default-000000b8;2", "Local/28 at default-000000ba;1,p") in new stack
> == Spawn extension (receptionist4, s, 16) exited non-zero on 'Surrogate/Local/28 at default-000000ba;1'
> -- Channel Local/28 at default-000000ba;1 joined 'simple_bridge' basic-bridge <db41b6a4-3a40-43eb-892e-1d496da479db>
> -- Channel Local/69 at default-000000b8;2 joined 'simple_bridge' basic-bridge <db41b6a4-3a40-43eb-892e-1d496da479db>
> [May 2 00:06:18] WARNING[22967][C-0000003f]: file.c:1245 ast_streamfile: Unable to open beep (format (slin192)): No such file or directory
> > Move-swap optimizing Local/28 at default-000000ba;1 <-- PJSIP/28-000000b6.
> -- Channel PJSIP/28-000000b6 left 'simple_bridge' basic-bridge <b7992456-512e-4047-b4b2-c5a02e4b05ab>
> -- Channel Local/28 at default-000000ba;1 left 'simple_bridge' basic-bridge <db41b6a4-3a40-43eb-892e-1d496da479db>
> -- Channel PJSIP/28-000000b6 swapped with Local/28 at default-000000ba;1 into 'simple_bridge' basic-bridge <db41b6a4-3a40-43eb-892e-1d496da479db>
> -- Channel Local/28 at default-000000ba;2 left 'simple_bridge' basic-bridge <b7992456-512e-4047-b4b2-c5a02e4b05ab>
> == Spawn extension (local-sip-call, s, 11) exited non-zero on 'Local/28 at default-000000ba;2'
> -- Executing [s at receptionist4:17] Playback("Local/28 at default-000000ba;1", "beep") in new stack
> -- <Local/28 at default-000000ba;1> Playing 'beep.gsm' (language 'en')
> > Move-swap optimizing Local/69 at default-000000b8;2 <-- PJSIP/mobile-000000b4.
> -- Channel PJSIP/mobile-000000b4 left 'simple_bridge' basic-bridge <f6726fe1-c05f-4d7b-87ad-cf1eb8cfc113>
> -- Channel Local/69 at default-000000b8;2 left 'simple_bridge' basic-bridge <db41b6a4-3a40-43eb-892e-1d496da479db>
> -- Channel PJSIP/mobile-000000b4 swapped with Local/69 at default-000000b8;2 into 'simple_bridge' basic-bridge <db41b6a4-3a40-43eb-892e-1d496da479db>
> > Bridge db41b6a4-3a40-43eb-892e-1d496da479db: switching from simple_bridge technology to native_rtp
> > Remotely bridged 'PJSIP/mobile-000000b4' and 'PJSIP/28-000000b6' - media will flow directly between them
> -- Channel Local/69 at default-000000b8;1 left 'simple_bridge' basic-bridge <f6726fe1-c05f-4d7b-87ad-cf1eb8cfc113>
> -- Executing [h at newanswer:1] NoOp("Local/69 at default-000000b8;2", "in hangup") in new stack
> -- Local/69 at default-000000b8;2 Internal Gosub(logoutemployee,s,1(hangup_handler)) start
> -- Executing [s at logoutemployee:1] NoOp("Local/69 at default-000000b8;2", "I am channel Local/69 at default-000000b8;2 and and hangup_handler") in new stack
> -- Executing [s at logoutemployee:2] Return("Local/69 at default-000000b8;2", "") in new stack
> == Spawn extension (newanswer, h, 2) exited non-zero on 'Local/69 at default-000000b8;2'
> -- Local/69 at default-000000b8;2 Internal Gosub(logoutemployee,s,1(hangup_handler)) complete GOSUB_RETVAL=
> {noformat}
> when hanging up:
> {noformat}
> -- Channel PJSIP/mobile-000000b4 left 'native_rtp' basic-bridge <db41b6a4-3a40-43eb-892e-1d496da479db>
> -- Channel PJSIP/28-000000b6 left 'native_rtp' basic-bridge <db41b6a4-3a40-43eb-892e-1d496da479db>
> == Spawn extension (internal2local, s, 13) exited non-zero on 'PJSIP/mobile-000000b4'
> {noformat}
> Scenario 2: Bridge command with MixMonitor, beep after MixMonitor
> {noformat}
> exten => s,1001,Set(CALLEDNUM=${SHARED(connecttocid)})
> exten => s,1002,agi(googletts.agi,"Sie werden mit ${ADMIN-${SHARED(connecttoadminid)}-spokenfname} ${ADMIN-${SHARED(connecttoadminid)}-spokenlname} verbunden.",de,,1.4)
> exten => s,1003,Set(CHANNEL(hangup_handler_push)=logoutemployee,s,1(hangup_handler))
> exten => s,1004,Set(CHANNEL(after_bridge_goto)=logoutemployee,s,1(after_bridge))
> exten => s,1005,MixMonitor(${STRFTIME(${EPOCH},,%Y%m%d-%H%M%S)}-${CALLERID(num)}-${CALLEDNUM}.wav)
> exten => s,1006,Playback(beep)
> exten => s,1007,Bridge(${SHARED(connecttochannel)},p)
> exten => s,1008,Noop(here ${BRIDGEPEER})
> exten => s,1009,Wait(5)
> exten => s,1010,Hangup()
> exten => h,1,Noop(in hangup)
> {noformat}
> {noformat}
> -- Executing [s at newanswer:1001] Set("Local/69 at default-000000bb;2", "CALLEDNUM=28") in new stack
> -- Executing [s at newanswer:1002] AGI("Local/69 at default-000000bb;2", "googletts.agi,"Sie werden mit Frédéric Steinfels verbunden.",de,,1.4") in new stack
> -- Launched AGI Script /var/lib/asterisk/agi-bin/googletts.agi
> -- <Local/69 at default-000000bb;2> Playing '/data/Telefon/googletts//9c3c06da9e11b5448585f24c9285641b.1.4.slin16' (escape_digits=) (sample_offset 0) (language 'en')
> -- <Local/69 at default-000000bb;2>AGI Script googletts.agi completed, returning 0
> -- Executing [s at newanswer:1003] Set("Local/69 at default-000000bb;2", "CHANNEL(hangup_handler_push)=logoutemployee,s,1(hangup_handler)") in new stack
> -- Executing [s at newanswer:1004] Set("Local/69 at default-000000bb;2", "CHANNEL(after_bridge_goto)=logoutemployee,s,1(after_bridge)") in new stack
> -- Executing [s at newanswer:1005] MixMonitor("Local/69 at default-000000bb;2", "20180502-002543-29-28.wav") in new stack
> -- Executing [s at newanswer:1006] Playback("Local/69 at default-000000bb;2", "beep") in new stack
> == Begin MixMonitor Recording Local/69 at default-000000bb;2
> -- <Local/69 at default-000000bb;2> Playing 'beep.gsm' (language 'en')
> -- Executing [s at newanswer:1007] Bridge("Local/69 at default-000000bb;2", "Local/28 at default-000000bd;1,p") in new stack
> == Spawn extension (receptionist4, s, 16) exited non-zero on 'Surrogate/Local/28 at default-000000bd;1'
> -- Channel Local/28 at default-000000bd;1 joined 'simple_bridge' basic-bridge <8e648097-8dcd-451d-9bb6-5cd7a3aa57a9>
> -- Channel Local/69 at default-000000bb;2 joined 'simple_bridge' basic-bridge <8e648097-8dcd-451d-9bb6-5cd7a3aa57a9>
> -- <Local/28 at default-000000bd;1> Playing 'beep.slin192' (language 'en')
> > Move-swap optimizing Local/28 at default-000000bd;1 <-- PJSIP/28-000000b9.
> -- Channel PJSIP/28-000000b9 left 'simple_bridge' basic-bridge <e08c964b-c6a1-4c37-8322-16118a5644c2>
> -- Channel Local/28 at default-000000bd;1 left 'simple_bridge' basic-bridge <8e648097-8dcd-451d-9bb6-5cd7a3aa57a9>
> -- Channel PJSIP/28-000000b9 swapped with Local/28 at default-000000bd;1 into 'simple_bridge' basic-bridge <8e648097-8dcd-451d-9bb6-5cd7a3aa57a9>
> -- Channel Local/28 at default-000000bd;2 left 'simple_bridge' basic-bridge <e08c964b-c6a1-4c37-8322-16118a5644c2>
> -- Executing [s at receptionist4:17] Playback("Local/28 at default-000000bd;1", "beep") in new stack
> == Spawn extension (local-sip-call, s, 11) exited non-zero on 'Local/28 at default-000000bd;2'
> -- <Local/28 at default-000000bd;1> Playing 'beep.gsm' (language 'en')
> {noformat}
> when hanging up:
> {noformat}
> -- Channel PJSIP/mobile-000000b7 left 'simple_bridge' basic-bridge <a5a00ca2-c9f0-4943-8ccc-39837695842b>
> -- Channel Local/69 at default-000000bb;1 left 'simple_bridge' basic-bridge <a5a00ca2-c9f0-4943-8ccc-39837695842b>
> == Spawn extension (internal2local, s, 13) exited non-zero on 'PJSIP/mobile-000000b7'
> -- Executing [s at logoutemployee:1] NoOp("Local/69 at default-000000bb;1", "I am channel Local/69 at default-000000bb;1 and and ") in new stack
> -- Executing [s at logoutemployee:2] Return("Local/69 at default-000000bb;1", "") in new stack
> [May 2 00:25:49] ERROR[8746][C-00000040]: app_stack.c:389 return_exec: Return without Gosub: stack is unallocated
> == Spawn extension (logoutemployee, s, 2) exited non-zero on 'Local/69 at default-000000bb;1'
> -- Channel Local/69 at default-000000bb;2 left 'simple_bridge' basic-bridge <8e648097-8dcd-451d-9bb6-5cd7a3aa57a9>
> -- Channel PJSIP/28-000000b9 left 'simple_bridge' basic-bridge <8e648097-8dcd-451d-9bb6-5cd7a3aa57a9>
> -- Executing [h at newanswer:1] NoOp("Local/69 at default-000000bb;2", "in hangup") in new stack
> -- Local/69 at default-000000bb;2 Internal Gosub(logoutemployee,s,1(hangup_handler)) start
> -- Executing [s at logoutemployee:1] NoOp("Local/69 at default-000000bb;2", "I am channel Local/69 at default-000000bb;2 and and hangup_handler") in new stack
> -- Executing [s at logoutemployee:2] Return("Local/69 at default-000000bb;2", "") in new stack
> == Spawn extension (newanswer, h, 2) exited non-zero on 'Local/69 at default-000000bb;2'
> -- Local/69 at default-000000bb;2 Internal Gosub(logoutemployee,s,1(hangup_handler)) complete GOSUB_RETVAL=
> == Spawn extension (newanswer, h, 2) exited non-zero on 'Local/69 at default-000000bb;2'
> -- Local/69 at default-000000bb;2 Internal Gosub(kill-originated,s,1) complete GOSUB_RETVAL=
> == MixMonitor close filestream (mixed)
> == End MixMonitor Recording Local/69 at default-000000bb;2
> {noformat}
> Scenario 3: Bridge command with MixMonitor, beep before MixMonitor
> {noformat}
> exten => s,1001,Set(CALLEDNUM=${SHARED(connecttocid)})
> exten => s,1002,agi(googletts.agi,"Sie werden mit ${ADMIN-${SHARED(connecttoadminid)}-spokenfname} ${ADMIN-${SHARED(connecttoadminid)}-spokenlname} verbunden.",de,,1.4)
> exten => s,1003,Set(CHANNEL(hangup_handler_push)=logoutemployee,s,1(hangup_handler))
> exten => s,1004,Set(CHANNEL(after_bridge_goto)=logoutemployee,s,1(after_bridge))
> exten => s,1005,Playback(beep)
> exten => s,1006,MixMonitor(${STRFTIME(${EPOCH},,%Y%m%d-%H%M%S)}-${CALLERID(num)}-${CALLEDNUM}.wav)
> exten => s,1007,Bridge(${SHARED(connecttochannel)},p)
> exten => s,1008,Noop(here ${BRIDGEPEER})
> exten => s,1009,Wait(5)
> exten => s,1010,Hangup()
> exten => h,1,Noop(in hangup)
> {noformat}
> {noformat}
> -- Executing [s at newanswer:1001] Set("Local/69 at default-000000c1;2", "CALLEDNUM=28") in new stack
> -- Executing [s at newanswer:1002] AGI("Local/69 at default-000000c1;2", "googletts.agi,"Sie werden mit Frédéric Steinfels verbunden.",de,,1.4") in new stack
> -- Launched AGI Script /var/lib/asterisk/agi-bin/googletts.agi
> -- <Local/69 at default-000000c1;2> Playing '/data/Telefon/googletts//9c3c06da9e11b5448585f24c9285641b.1.4.slin16' (escape_digits=) (sample_offset 0) (language 'en')
> -- <Local/69 at default-000000c1;2>AGI Script googletts.agi completed, returning 0
> -- Executing [s at newanswer:1003] Set("Local/69 at default-000000c1;2", "CHANNEL(hangup_handler_push)=logoutemployee,s,1(hangup_handler)") in new stack
> -- Executing [s at newanswer:1004] Set("Local/69 at default-000000c1;2", "CHANNEL(after_bridge_goto)=logoutemployee,s,1(after_bridge)") in new stack
> -- Executing [s at newanswer:1005] Playback("Local/69 at default-000000c1;2", "beep") in new stack
> -- <Local/69 at default-000000c1;2> Playing 'beep.gsm' (language 'en')
> -- Executing [s at newanswer:1006] MixMonitor("Local/69 at default-000000c1;2", "20180502-003048-29-28.wav") in new stack
> -- Executing [s at newanswer:1007] Bridge("Local/69 at default-000000c1;2", "Local/28 at default-000000c3;1,p") in new stack
> == Begin MixMonitor Recording Local/69 at default-000000c1;2
> == Spawn extension (receptionist4, s, 16) exited non-zero on 'Surrogate/Local/28 at default-000000c3;1'
> -- Channel Local/28 at default-000000c3;1 joined 'simple_bridge' basic-bridge <2702b6fb-41e5-4696-bc54-cd7312b0a68d>
> -- Channel Local/69 at default-000000c1;2 joined 'simple_bridge' basic-bridge <2702b6fb-41e5-4696-bc54-cd7312b0a68d>
> -- <Local/28 at default-000000c3;1> Playing 'beep.gsm' (language 'en')
> > Move-swap optimizing Local/28 at default-000000c3;1 <-- PJSIP/28-000000bf.
> -- Channel PJSIP/28-000000bf left 'simple_bridge' basic-bridge <9078b1e8-0149-430b-acb2-3b351814be3d>
> -- Channel Local/28 at default-000000c3;1 left 'simple_bridge' basic-bridge <2702b6fb-41e5-4696-bc54-cd7312b0a68d>
> -- Channel PJSIP/28-000000bf swapped with Local/28 at default-000000c3;1 into 'simple_bridge' basic-bridge <2702b6fb-41e5-4696-bc54-cd7312b0a68d>
> -- Channel Local/28 at default-000000c3;2 left 'simple_bridge' basic-bridge <9078b1e8-0149-430b-acb2-3b351814be3d>
> -- Executing [s at receptionist4:17] Playback("Local/28 at default-000000c3;1", "beep") in new stack
> == Spawn extension (local-sip-call, s, 11) exited non-zero on 'Local/28 at default-000000c3;2'
> -- <Local/28 at default-000000c3;1> Playing 'beep.gsm' (language 'en')
> {noformat}
> when hanging up:
> {noformat}
> -- Channel PJSIP/mobile-000000bd left 'simple_bridge' basic-bridge <bf89b7d9-10af-4586-a6f7-fdc42444bcc9>
> -- Channel Local/69 at default-000000c1;1 left 'simple_bridge' basic-bridge <bf89b7d9-10af-4586-a6f7-fdc42444bcc9>
> == Spawn extension (internal2local, s, 13) exited non-zero on 'PJSIP/mobile-000000bd'
> -- Executing [s at logoutemployee:1] NoOp("Local/69 at default-000000c1;1", "I am channel Local/69 at default-000000c1;1 and and ") in new stack
> -- Executing [s at logoutemployee:2] Return("Local/69 at default-000000c1;1", "") in new stack
> [May 2 00:30:53] ERROR[12280][C-00000042]: app_stack.c:389 return_exec: Return without Gosub: stack is unallocated
> == Spawn extension (logoutemployee, s, 2) exited non-zero on 'Local/69 at default-000000c1;1'
> -- Channel Local/69 at default-000000c1;2 left 'simple_bridge' basic-bridge <2702b6fb-41e5-4696-bc54-cd7312b0a68d>
> -- Channel PJSIP/28-000000bf left 'simple_bridge' basic-bridge <2702b6fb-41e5-4696-bc54-cd7312b0a68d>
> -- Executing [h at newanswer:1] NoOp("Local/69 at default-000000c1;2", "in hangup") in new stack
> -- Local/69 at default-000000c1;2 Internal Gosub(logoutemployee,s,1(hangup_handler)) start
> -- Executing [s at logoutemployee:1] NoOp("Local/69 at default-000000c1;2", "I am channel Local/69 at default-000000c1;2 and and hangup_handler") in new stack
> -- Executing [s at logoutemployee:2] Return("Local/69 at default-000000c1;2", "") in new stack
> == Spawn extension (newanswer, h, 2) exited non-zero on 'Local/69 at default-000000c1;2'
> -- Local/69 at default-000000c1;2 Internal Gosub(logoutemployee,s,1(hangup_handler)) complete GOSUB_RETVAL=
> == Spawn extension (newanswer, h, 2) exited non-zero on 'Local/69 at default-000000c1;2'
> -- Local/69 at default-000000c1;2 Internal Gosub(kill-originated,s,1) complete GOSUB_RETVAL=
> == MixMonitor close filestream (mixed)
> == End MixMonitor Recording Local/69 at default-000000c1;2
> {noformat}
> I am seeing these errors/facts:
> - In scenario 1, after_bridge_goto is not called at all
> - In scenario 1, hangup_handler_push is called immediately after the Bridge command
> - In scenario 1, h extension is not called at all
> - In scenario 1, for some reason, the Beep command can not be played on one of the channels
> - In scenario 2, after_bridge is ok
> - In scenario 2, hangup_handler_push is ok
> - In scenario 2, h extension is ok
> - In scenario 2, mixmonitor file is too long and contains no audio except the beep
> - In scenario 3, after_bridge is ok
> - In scenario 3, hangup_handler_push is ok
> - In scenario 3, h extension is ok
> - In scenario 3, mixmonitor file is ok
> Btw: The bridge command lacks various flags that the Queue and Dial command have like pre-bridge macros (M and U flags in the dial command).
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