[Asterisk-Users] PRI Issue - Calls being rejected with
unacceptable channel
Steve Totaro
stotaro at asteriskhelpdesk.com
Thu Jun 22 11:28:40 MST 2006
Andy Brezinsky wrote:
> Hey all. We have a DS3 circuit with GBLX split off into 7 systems
> with a 4 port sangoma card (A104D) in the first 2 systems, and digium
> T410P cards in the other 5. GBLX numbers their spans from 0 to 3
> instead of 1-4 and we have a NFAS configuration with the d-channel on
> chan 96. All of our systems are running 1.0.7 for stability reasons
> (and no good time for maintaince, the entire platform is used most of
> the day) but if an upgrade will help us, we'll schedule it soon.
>
> We've recently been experiencing people not being able to get in. We
> have a hunt group tied in over our 7 trunks which will roll them if a
> trunk is busy or out of order. It seems that call comes into this
> termination system (see trace below), we fire back a "Cause: Channel
> unacceptable (6)" event to GBLX and they try the next system, even if
> this system isn't busy. Because of this, calls can eventually try all
> 7 systems, get rejected, and then users get busy messages even though
> we're not at total capacity yet. Below I've attached the entire pri
> debug of one of these events happening. Can anyone shed some light on
> where we should be looking to fix this stuff?
>
> milwia1-terma-2*CLI> pri debug span 4
> Enabled debugging on span 4
> < Protocol Discriminator: Q.931 (8) len=47
> < Call Ref: len= 2 (reference 15996/0x3E7C) (Originator)
> < Message type: SETUP (5)
> < [04 03 80 90 a2]
> < Bearer Capability (len= 5) [ Ext: 1 Q.931 Std: 0 Info transfer
> capability: Speech (0)
> < Ext: 1 Trans mode/rate: 64kbps,
> circuit-mode (16)
> < Ext: 1 User information layer 1: u-Law
> (34)
> < [18 04 e9 80 83 8e]
> < Channel ID (len= 6) [ Ext: 1 IntID: Explicit, PRI Spare: 0,
> Exclusive Dchan: 0
> < ChanSel: Reserved
> < Ext: 1 DS1 Identifier: 0
> < Ext: 1 Coding: 0 Number Specified Channel
> Type: 3
> < Ext: 1 Channel: 14 ]
> < [1e 02 81 83]
> < Progress Indicator (len= 4) [ Ext: 1 Coding: CCITT (ITU) standard
> (0) 0: 0 Location: Private network serving the local user (1)
> < Ext: 1 Progress Description: Calling
> equipment is non-ISDN. (3) ]
> < [6c 0c 21 81 33 32 33 38 30 31 37 39 37 30]
> < Calling Number (len=14) [ Ext: 0 TON: National Number (2) NPI:
> ISDN/Telephony Numbering Plan (E.164/E.163) (1)
> < Presentation: Presentation permitted, user
> number passed network screening (1) '323801XXXX' ]
> < [70 0b a1 38 30 30 39 37 38 37 32 37 39]
> < Called Number (len=13) [ Ext: 1 TON: National Number (2) NPI:
> ISDN/Telephony Numbering Plan (E.164/E.163) (1) '800978XXXX' ]
> -- Making new call for cr 15996
> -- Processing Q.931 Call Setup
> -- Processing IE 4 (cs0, Bearer Capability)
> -- Processing IE 24 (cs0, Channel Identification)
> -- Processing IE 30 (cs0, Progress Indicator)
> -- Processing IE 108 (cs0, Calling Party Number)
> -- Processing IE 112 (cs0, Called Party Number)
> > Protocol Discriminator: Q.931 (8) len=10
> > Call Ref: len= 2 (reference 48764/0xBE7C) (Terminator)
> > Message type: CALL PROCEEDING (2)
> > [18 03 a9 83 8e]
> > Channel ID (len= 5) [ Ext: 1 IntID: Implicit, PRI Spare: 0,
> Exclusive Dchan: 0
> > ChanSel: Reserved
> > Ext: 1 Coding: 0 Number Specified Channel
> Type: 3
> > Ext: 1 Channel: 14 ]
> -- Accepting voice call from '323801XXXX' to '800978XXXX' on
> channel 0/14, span 4
> -- Executing SetVar("Zap/14-1", "SERVER_ID=2") in new stack
> -- Executing Answer("Zap/14-1", "") in new stack
> > Protocol Discriminator: Q.931 (8) len=14
> > Call Ref: len= 2 (reference 48764/0xBE7C) (Terminator)
> > Message type: CONNECT (7)
> > [18 03 a9 83 8e]
> > Channel ID (len= 5) [ Ext: 1 IntID: Implicit, PRI Spare: 0,
> Exclusive Dchan: 0
> > ChanSel: Reserved
> > Ext: 1 Coding: 0 Number Specified Channel
> Type: 3
> > Ext: 1 Channel: 14 ]
> > [1e 02 81 82]
> > Progress Indicator (len= 4) [ Ext: 1 Coding: CCITT (ITU) standard
> (0) 0: 0 Location: Private network serving the local user (1)
> > Ext: 1 Progress Description: Called
> equipment is non-ISDN. (2) ]
> -- Executing AGI("Zap/14-1", "incoming_call.pl") in new stack
> -- Launched AGI Script /var/lib/asterisk/agi-bin/incoming_call.pl
> < Protocol Discriminator: Q.931 (8) len=9
> < Call Ref: len= 2 (reference 15996/0x3E7C) (Originator)
> < Message type: RELEASE (77)
> < [08 02 83 86]
> < Cause (len= 4) [ Ext: 1 Coding: CCITT (ITU) standard (0) 0: 0
> Location: Transit network (3)
> < Ext: 1 Cause: Channel unacceptable (6), class =
> Normal Event (0) ]
> -- Processing IE 8 (cs0, Cause)
> -- Channel 0/14, span 4 got hangup
> < Protocol Discriminator: Q.931 (8) len=13
> < Call Ref: len= 2 (reference 15996/0x3E7C) (Originator)
> < Message type: STATUS (125)
> < [08 03 83 e5 07]
> < Cause (len= 5) [ Ext: 1 Coding: CCITT (ITU) standard (0) 0: 0
> Location: Transit network (3)
> < Ext: 1 Cause: Message not compatible with call
> state (101), class = Protocol Error (6) ]
> < Cause data 1: 07 (7)
> < [14 01 13]
> < Call State (len= 3) [ Ext: 0 Coding: CCITT (ITU) standard (0) Call
> state: Release Request (19)
> -- Processing IE 8 (cs0, Cause)
> -- Processing IE 20 (cs0, Call State)
> -- Executing DeadAGI("Zap/14-1", "disconnect_call.pl") in new stack
> -- Launched AGI Script /var/lib/asterisk/agi-bin/disconnect_call.pl
> -- AGI Script disconnect_call.pl completed, returning 0
> -- Executing Hangup("Zap/14-1", "") in new stack
> NEW_HANGUP DEBUG: Calling q931_hangup, ourstate Null, peerstate
> Release Request
> > Protocol Discriminator: Q.931 (8) len=9
> > Call Ref: len= 2 (reference 48764/0xBE7C) (Terminator)
> > Message type: RELEASE COMPLETE (90)
> > [08 02 81 90]
> > Cause (len= 4) [ Ext: 1 Coding: CCITT (ITU) standard (0) 0: 0
> Location: Private network serving the local user (1)
> > Ext: 1 Cause: Normal Clearing (16), class = Normal
> Event (1) ]
> NEW_HANGUP DEBUG: Calling q931_hangup, ourstate Null, peerstate Null
> NEW_HANGUP DEBUG: Destroying the call, ourstate Null, peerstate Null
> -- Hungup 'Zap/14-1'
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What are the perl scripts and the AGI? This is exactly the same setup I
have but all Sangoma cards. I even have global crossing for the T3.
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