[asterisk-ss7] CHANUNAVAIL

[Markus A. Wipfler]

Hi all,

i am using libss7-trunk and asterisk-trunk to connect to a telecom  
switch. I have been getting a lot of complaints from clients that  
calls are not going through. My ASR is below 20%. When i analyze the  
hangup causes, i find that more than 50% are Unknown:
Cause: Unknown (47)
Cause: Unknown (20)
Cause: Unknown (0)

Below is a debug of a failed call, I highly appretiate any help.


--
Markus



     -- Accepting UNAUTHENTICATED call from IP.IP.IP.IP:
        > requested format = ulaw,
        > requested prefs = (ulaw|alaw|gsm),
        > actual format = ulaw,
        > host prefs = (ulaw|alaw|gsm),
        > priority = mine
     -- Executing [0752434592 at from-pbx:1] Set("IAX2/Trunk-GSM-9",  
"CALLERPRES()=allowed") in new stack
     -- Executing [0752434592 at from-pbx:2] Dial("IAX2/Trunk-GSM-9",  
"Zap/g2/752434592") in new stack
trunk*CLI>      -->XXX-->XXX entered opt params with pcount=1, x=5
Len = 37 [ e6 f6 22 c5 88 ec 98 10 01 00 01 00 60 01 0a 00 02 09 07 03  
10 57 42 43 95 f2 0a 08 04 13 52 46 41 65 82 00 00 ]
FSN: 118 FIB 1
BSN: 102 BIB 1
 >[0] MSU
[ e6 f6 22 ]
         Network Indicator: 3 Priority: 0 User Part: ISUP (5)
         [ c5 ]
         OPC 611 DPC 11400 SLS 1
         [ 88 ec 98 10 ]
                 CIC: 1
                 [ 01 00 ]
                 Message Type: IAM
                 [ 01 ]
                 --FIXED LENGTH PARMS[4]--
                 Nature of Connection Indicator:
                         Satellites in connection: 0
                         Continuity Check: Check not required (0)
                         Outgoing half echo control device: not  
included (0)
                         [ 00 ]
                 Forward Call Indicators:
                         Nat/Intl Call Ind: call to be treated as a  
national call (0)
                         End to End Method Ind: no end-to-end  
method(s) available (0)
                         Interworking Ind: no interworking encountered  
(0)
                         End to End Info Ind: no end-to-end  
information available (0)
                         ISDN User Part Ind: ISDN user part used all  
the way (1)
                         ISDN User Part Pref Ind: ISDN user part not  
preferred all the way (1)
                         ISDN Access Ind: originating access ISDN (1)
                         SCCP Method Ind: no indication (0)
                         [ 60 01 ]
                 Calling Party Category:
                         Category: Ordinary calling subscriber (10)
                         [ 0a ]
                 Transmission Medium Requirements:
                         Speech (0)
                         [ 00 ]
                 --VARIABLE LENGTH PARMS[1]--
                 Called Party Number:
                         Nature of address: 3
                         NI: 0
                         Numbering plan: 1
                         Address signals: 752434592#
                         [ 07 03 10 57 42 43 95 f2 ]
                 --OPTIONAL PARMS--
                 Calling Party Number:
                         Nature of address: 4
                         NI: 0
                         Numbering plan: 1
                         Presentation: 0
                         Screening: 3
                         Address signals: 256414562800
                         [ 0a 08 04 13 52 46 41 65 82 00 ]

     -- Called g2/752434592
Len = 16 [ f6 e7 0d c5 63 02 22 1b 01 00 0c 02 00 02 82 af ]
FSN: 103 FIB 1
BSN: 118 BIB 1
<[0] MSU
[ f6 e7 0d ]
         Network Indicator: 3 Priority: 0 User Part: ISUP (5)
         [ c5 ]
         OPC 11400 DPC 611 SLS 1
         [ 63 02 22 1b ]
                 CIC: 1
                 [ 01 00 ]
                 Message Type: REL
                 [ 0c ]
                 --VARIABLE LENGTH PARMS[1]--
                 Cause Indicator:
                         Coding Standard: 0
                         Location: 2
                         Cause Class: 2
                         Cause Subclass: 15
                         Cause: Unknown (47)
                         [ 02 82 af ]

                 -->XXX-->XXX entered opt params with pcount=1, x=0
Len = 12 [ e7 f7 09 c5 88 ec 98 10 01 00 10 00 ]
FSN: 119 FIB 1
BSN: 103 BIB 1
 >[0] MSU
[ e7 f7 09 ]
         Network Indicator: 3 Priority: 0 User Part: ISUP (5)
         [ c5 ]
         OPC 611 DPC 11400 SLS 1
         [ 88 ec 98 10 ]
                 CIC: 1
                 [ 01 00 ]
                 Message Type: RLC
                 [ 10 ]

[Mar 18 12:12:16] WARNING[1846]: app_dial.c:818 wait_for_answer:  
Unable to forward voice or dtmf
     -- Hungup 'Zap/1-1'
   == Everyone is busy/congested at this time (1:0/0/1)
     -- Auto fallthrough, channel 'IAX2/Trunk-GSM-9' status is  
'CHANUNAVAIL'
     -- Hungup 'IAX2/Trunk-GSM-9'