[cisco-voip] Inbound PSTN call to SIP Gateway

Mon Apr 26 18:44:37 EDT 2010

I'm getting a strange behavior on our SIP Gateway.  Not sure if this is a
SIP problem or an ISDN problem.  Topology is PRI to 2921 (15.0.M1.12) SIP
Gateway to CUCM 8.0(2).  On at least half of inbound calls, I do not see SIP
setup messages immediately.  I get a 'No route to destination' ISDN
message.  Then, as soon as the call is released, I immediately see SIP
invite message and my phone begins to ring.  I can reproduce this
consistently, although it only happens on about 60% of calls.  On the calls
that don't work properly, I see a strange second ISDN setup message.  On the
calls that do work properly, I do not see this second setup message.  Here
is a debug of a bad call.  Any ideas?

002311: Apr 26 17:20:49 Central: ISDN Se0/0/0:23 Q931: RX <- SETUP pd = 8
callref = 0x0001
        Bearer Capability i = 0x8090A2
                Standard = CCITT
                Transfer Capability = Speech
                Transfer Mode = Circuit
                Transfer Rate = 64 kbit/s
        Channel ID i = 0xA98381
                Exclusive, Channel 1
        Calling Party Number i = 0x2183, '9528183360'
                Plan:ISDN, Type:National
        Called Party Number i = 0xC1, '7715'
                Plan:ISDN, Type:Subscriber(local)
002312: Apr 26 17:20:49 Central: ISDN Se0/0/0:23 Q931: Received SETUP
callref = 0x8001 callID = 0x0052 switch = primary-5ess interface = User
002313: Apr 26 17:20:49 Central: ISDN Se0/0/0:23 Q931: Applying typeplan for
sw-type 0x3 is 0x2 0x1, Calling num 9528183360
002314: Apr 26 17:20:49 Central: ISDN Se0/0/0:23 Q931: Sending SETUP
callref = 0x00A3 callID = 0x8024 switch = primary-5ess interface = User
002315: Apr 26 17:20:49 Central: ISDN Se0/0/0:23 Q931: TX -> CALL_PROC pd =
8  callref = 0x8001
        Channel ID i = 0xA98381
                Exclusive, Channel 1
002316: Apr 26 17:20:49 Central: ISDN Se0/0/0:23 Q931: TX -> SETUP pd = 8
callref = 0x00A3
        Bearer Capability i = 0x8090A2
                Standard = CCITT
                Transfer Capability = Speech
                Transfer Mode = Circuit
                Transfer Rate = 64 kbit/s
        Channel ID i = 0xA98397
                Exclusive, Channel 23
        Calling Party Number i = 0x2183, '9528183360'
                Plan:ISDN, Type:National
        Called Party Number i = 0xC1, '7715'
                Plan:ISDN, Type:Subscriber(local)
002317: Apr 26 17:20:49 Central: ISDN Se0/0/0:23 Q931: RX <- CALL_PROC pd =
8  callref = 0x80A3
        Channel ID i = 0xA98397
                Exclusive, Channel 23
UHD.EAST.RTR1#
002318: Apr 26 17:20:49 Central: ISDN Se0/0/0:23 Q931: RX <- PROGRESS pd =
8  callref = 0x80A3
        Cause i = 0x8283 - No route to destination
        Progress Ind i = 0x8288 - In-band info or appropriate now available
002319: Apr 26 17:20:49 Central: ISDN Se0/0/0:23 Q931: TX -> ALERTING pd =
8  callref = 0x8001
        Progress Ind i = 0x8288 - In-band info or appropriate now available
UHD.EAST.RTR1#
002320: Apr 26 17:20:56 Central: ISDN Se0/0/0:23 Q931: RX <- DISCONNECT pd =
8  callref = 0x80A3
        Cause i = 0x8290 - Normal call clearing
002321: Apr 26 17:20:56 Central: ISDN Se0/0/0:23 Q931: TX -> RELEASE pd = 8
callref = 0x00A3
002322: Apr 26 17:20:56 Central: ISDN Se0/0/0:23 Q931: RX <- RELEASE_COMP pd
= 8  callref = 0x80A3
002323: Apr 26 17:20:56 Central: //-1/xxxxxxxxxxxx/SIP/Msg/ccsipDisplayMsg:
Sent:
INVITE sip:7715 at 172.21.20.10:5060 SIP/2.0
Via: SIP/2.0/UDP 172.21.20.254:5060;branch=z9hG4bK5F116B5
Remote-Party-ID: <sip:9528183360 at 172.21.20.254<sip%3A9528183360 at 172.21.20.254>
>;party=calling;screen=yes;privacy=off
From: <sip:9528183360 at 172.21.20.254 <sip%3A9528183360 at 172.21.20.254>
>;tag=338EFDD0-0
To: <sip:7715 at 172.21.20.10 <sip%3A7715 at 172.21.20.10>>
Date: Mon, 26 Apr 2010 22:20:56 GMT
Call-ID: D173E402-50B811DF-81B6FADB-42390B at 172.21.20.254
Supported: 100rel,timer,resource-priority,replaces,sdp-anat
Min-SE:  1800
Cisco-Guid: 3443953355-1354240479-2151450691-3779644176
User-Agent: Cisco-SIPGateway/IOS-12.x
Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, UPDATE, REFER, SUBSCRIBE,
NOTIFY, INFO, REGISTER
CSeq: 101 INVITE
Max-Forwards: 70
Timestamp: 1272320456
Contact: <sip:9528183360 at 172.21.20.254:5060>
Expires: 180
Allow-Events: telephone-event
Content-Type: application/sdp
Content-Disposition: session;handling=required
Content-Length: 330
v=0
o=CiscoSystemsSIP-GW-UserAgent 6890 9465 IN IP4 172.21.20.254
s=SIP Call
c=IN IP4 172.21.20.254
t=0 0
m=audio 18282 RTP/AVP 0 18 9 101
c=IN IP4 172.21.20.254
a=rtpmap:0 PCMU/8000
a=rtpmap:18 G729/8000
a=fmtp:18 annexb=no
a=rtpmap:9 G722/8000
a=fmtp:9 bitrate=64
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-16
002324: Apr 26 17:20:56 Central: //-1/xxxxxxxxxxxx/SIP/Msg/ccsipDisplayMsg:
Received:
SIP/2.0 100 Trying
Via: SIP/2.0/UDP 172.21.20.254:5060;branch=z9hG4bK5F116B5
From: <sip:9528183360 at 172.21.20.254 <sip%3A9528183360 at 172.21.20.254>
>;tag=338EFDD0-0
To: <sip:7715 at 172.21.20.10 <sip%3A7715 at 172.21.20.10>>
Date: Mon, 26 Apr 2010 22:21:15 GMT
Call-ID: D173E402-50B811DF-81B6FADB-42390B at 172.21.20.254
CSeq: 101 INVITE
Allow-Events: presence
Content-Length: 0

002325: Apr 26 17:20:56 Central: //-1/xxxxxxxxxxxx/SIP/Msg/ccsipDisplayMsg:
Received:
SIP/2.0 180 Ringing
Via: SIP/2.0/UDP 172.21.20.254:5060;branch=z9hG4bK5F116B5
From: <sip:9528183360 at 172.21.20.254 <sip%3A9528183360 at 172.21.20.254>
>;tag=338EFDD0-0
To: <sip:7715 at 172.21.20.10 <sip%3A7715 at 172.21.20.10>
>;tag=fc6aef00-fcb6-4e1c-a8c0-e38242535154-20774958
Date: Mon, 26 Apr 2010 22:21:15 GMT
Call-ID: D173E402-50B811DF-81B6FADB-42390B at 172.21.20.254
CSeq: 101 INVITE
Allow: INVITE, OPTIONS, INFO, BYE, CANCEL, ACK, PRACK, UPDATE, REFER,
SUBSCRIBE, NOTIFY
Allow-Events: presence
Contact: <sip:7715 at 172.21.20.10:5060>
Supported: X-cisco-srtp-fallback
S
UHD.EAST.RTR1#upported: Geolocation
P-Asserted-Identity: "PNetworks" <sip:7715 at 172.21.20.10<sip%3A7715 at 172.21.20.10>
>
Remote-Party-ID: "PNetworks" <sip:7715 at 172.21.20.10<sip%3A7715 at 172.21.20.10>
>;party=called;screen=yes;privacy=off
Content-Length: 0

002326: Apr 26 17:20:58 Central: ISDN Se0/0/0:23 Q931: RX <- DISCONNECT pd =
8  callref = 0x0001
        Cause i = 0x8290 - Normal call clearing
002327: Apr 26 17:20:58 Central: ISDN Se0/0/0:23 Q931: TX -> RELEASE pd = 8
callref = 0x8001
002328: Apr 26 17:20:58 Central: //-1/xxxxxxxxxxxx/SIP/Msg/ccsipDisplayMsg:
Sent:
CANCEL sip:7715 at 172.21.20.10:5060 SIP/2.0
Via: SIP/2.0/UDP 172.21.20.254:5060;branch=z9hG4bK5F116B5
From: <sip:9528183360 at 172.21.20.254 <sip%3A9528183360 at 172.21.20.254>
>;tag=338EFDD0-0
To: <sip:7715 at 172.21.20.10 <sip%3A7715 at 172.21.20.10>>
Date: Mon, 26 Apr 2010 22:20:56 GMT
Call-ID: D173E402-50B811DF-81B6FADB-42390B at 172.21.20.254
CSeq: 101 CANCEL
Max-Forwards: 70
Timestamp: 1272320458
Reason: Q.850;cause=16
Content-Length: 0

002329: Apr 26 17:20:58 Central: //-1/xxxxxxxxxxxx/SIP/Msg/ccsipDisplayMsg:
Received:
SIP/2.0 200 OK
Via: SIP/2.0/UDP 172.21.20.254:5060;branch=z9hG4bK5F116B5
From: <sip:9528183360 at 172.21.20.254 <sip%3A9528183360 at 172.21.20.254>
>;tag=338EFDD0-0
To: <sip:7715 at 172.21.20.10 <sip%3A7715 at 172.21.20.10>>
Date: Mon, 26 Apr 2010 22:21:16 GMT
Call-ID: D173E402-50B811DF-81B6FADB-42390B at 172.21.20.254
CSeq: 101 CANCEL
Content-Length: 0
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