[asterisk-users] IAX2: Incoming calls answered prematurely?

[Eric "ManxPower" Wieling]

The remote server is where your problem is.

Alan Lord wrote:
> Hello,
> 
> This message is similar to one I posted before, but with a different 
> subject line and I've revised the description to hopefully make it clearer.
> 
> The basic problem is I am trying to dial 2 numbers simultaneously using 
> the & construct. One device is a "locally attached" soft SIP phone. The 
> other device is also a soft SIP phone, but it is on a different Asterisk 
> server connected over the Internet using IAX. Normal calls between our 
> servers work fine. However, when I try to dial *both* devices, the 
> remote Asterisk server answers the call on the IAX channel before it has 
> checked to see if the real destination device (the SIP phone) is on, 
> available or busy etc.
> 
> This is a problem because I am trying to route calls to a common 
> voicemail box if both lines are unavailable, busy or go unanswered. Once 
> the IAX channel answers the incoming call, the dialplan's job is 
> effectively done. Unfortunately, the remote Asterisk server clears the 
> call almost immediately, as it finds the real destination extension is 
> actually not available.
> 
> Can anyone see where the problem is? Or suggest a better way?
> 
> Many thanks.
> 
> Alan
> 
> Logs and configuration below:
> 
> Here's the last bit of the log (I've edited out the IP address) - we are
> both deliberately NOT answering our phones...
> 
>   Executing [s at tolc:1] Macro("SIP/101-081d1050",
> "belllord|SIP/101&IAX2/alanb/201|tolc") in new stack
>      -- Executing [s at macro-belllord:1] Dial("SIP/101-081d1050",
> "SIP/101&IAX2/alanb/201|10|tr") in new stack
>      -- Called 101
>      -- Called alanb/201
> [Oct 17 16:09:47] WARNING[2836]: channel.c:2634 ast_indicate_data:
> Unable to handle indication 3 for 'SIP/101-081d1050'
>      -- SIP/101-081d4fc0 is ringing
>      -- Call accepted by 80.XXX.XX.XX (format alaw)
>      -- Format for call is alaw
>      -- IAX2/alanb-3 answered SIP/101-081d1050
> [Oct 17 16:09:47] NOTICE[2836]: cdr.c:434 ast_cdr_free: CDR on channel
> 'SIP/101-081d4fc0' not posted
> [Oct 17 16:09:47] DEBUG[1419]: chan_iax2.c:7435 socket_process:
> Immediately destroying 3, having received hangup
> [Oct 17 16:09:47] DEBUG[2836]: chan_iax2.c:3176 iax2_hangup: We're
> hanging up IAX2/alanb-3 now...
> [Oct 17 16:09:47] DEBUG[2836]: chan_iax2.c:3191 iax2_hangup: Really
> destroying IAX2/alanb-3 now...
>      -- Hungup 'IAX2/alanb-3'
>    == Spawn extension (macro-belllord, s, 1) exited non-zero on
> 'SIP/101-081d1050' in macro 'belllord'
>    == Spawn extension (macro-belllord, s, 1) exited non-zero on
> 'SIP/101-081d1050'
> 
> And here's the relevant bits of my extension.conf
> 
> [globals]
> ALANL=SIP/101 ; My Soft Phone
> ALANB=IAX2/alanb/201 ; Alan's Extension
> 
> [main_menu] ; Test Dialplan for IVR
> exten => s,1,Answer()
> exten => s,n,Set(TIMEOUT(digit)=5) ; Max time between digits
> exten => s,n,Set(TIMEOUT(response)=15) ; Max time to wait
> exten => s,n,Wait(1)
> exten => s,n,Background(welcome-to-bell-lord)
> exten => s,n(resume),Background(press-3-for-tolc) ; Short dialogues,
> exten => s,n,Background(press-4-for-fondoo) ; rather than one long one
> exten => s,n,Background(press-5-for-arrowtees) ; might need to change
> exten => s,n,Background(press-6-for-gen-enq) ; frequently.
> exten => s,n,WaitExten()
> 
> exten => 3,1,Goto(tolc,s,1) ; Dial 3 For The Open Learning Centre
> exten => 4,1,Goto(fondoo,s,1) ; Dial 4 for Fondoo Internet
> exten => 5,1,Goto(arrowtees,s,1) ; Dial 5 for ArrowTees
> exten => 6,1,Goto(gen_enq,s,1) ; For all other enquiries press 6
> 
> exten => i,1,Playback(pbx-invalid)
> exten => i,n,Goto(resume)
> 
> exten => t,1,Playback(vm-goodbye)
> exten => t,n,Hangup() ; Might change this section to go to [gen_enq]
> voicemail rather than just hangup.
> 
> [tolc]
> exten => s,1,Macro(belllord,${ALANL}&${ALANB},${CONTEXT}) ; Calls the
> belllord Macro with the channel(s) to dial and the current context (for
> business voicemail)
> 
> [fondoo]
> exten => s,1,Macro(belllord,${ALANL}&${ALANB},${CONTEXT})
> 
> [arrowtees]
> exten => s,1,Macro(belllord,${ALANL},${CONTEXT})
> 
> [gen_enq]
> exten => s,1,Macro(belllord,${ALANL}&${ALANB},${CONTEXT})
> 
> ; Call with Macro(belllord,channel,vmbox)
> [macro-belllord] ; Uses macro and DIALSTATUS for local devices
> exten => s,1,Dial(${ARG1},10,tr)
> exten => s,n,Goto(s-${DIALSTATUS},1)
> exten => s-NOANSWER,1,Voicemail(${ARG2}@business,u) ; business is the
> voicemail context, ${ARG2} is the context from which this call came
> exten => s-BUSY,1,Voicemail(${ARG2}@business,b)
> exten => _s-.,1,Goto(s-NOANSWER,1)
> 
> ==============================
>