[Serusers] SER 0.8.12, Polycom 300, and ignored CANCEL messages

[Jamin W. Collins]

Anyone else seeing problems with Polycom 300 phones ignoring CANCEL
messages from a SER proxy?  I've got a number of SER proxies (running
0.8.12) that are receiving CANCEL messages and passing them on to the
Polycom phone, but all indications are that the phone is just ignoring
them (as it continues to ring).

Below is an example capture:

U 2004/11/08 15:10:32.802663 172.16.22.25:5060 -> 130.110.72.16:5060
SIP/2.0 180 Ringing..Via: SIP/2.0/UDP 130.110.72.16..From: "Interaction Cen
ter" <sip:8475787000 at GLCU.ORG;type=ICConnectionCall>;tag=8500..To: <sip:187
42 at 172.16.22.25:5060>;tag=585588F8-A212D515..CSeq: 1 INVITE..Call-ID: 198f7
c0ca5c28e7f59759c1f1c024617 at 130.110.72.16..Contact:<sip:18742 at 172.31.22.12>
..Record-Route: <sip:18742 at 172.16.22.25;ftag=8500;lr=on>..User-Agent: Polyc
omSoundPointIP-SPIP_500-UA/1.1.0..Content-Length: 0....

U 2004/11/08 15:10:47.634541 130.110.72.16:1136 -> 172.16.22.25:5060
CANCEL sip:18742 at 172.16.22.25:5060 SIP/2.0..To: <sip:18742 at 172.16.22.25:506
0>..From: "Interaction Center" <sip:8475787000 at GLCU.ORG;type=ICConnectionCa
ll>;tag=8500..Via: SIP/2.0/UDP 130.110.72.16..CSeq: 1 CANCEL..Call-ID: 198f
7c0ca5c28e7f59759c1f1c024617 at 130.110.72.16..User-Agent: ININ-EICSRVR01-9987
9649..Content-Length: 0....

U 2004/11/08 15:10:47.634635 172.16.22.25:5060 -> 172.31.22.12:5060
CANCEL sip:18742 at 172.31.22.12 SIP/2.0..Max-Forwards: 10..Record-Route: <sip
:18742 at 172.16.22.25;ftag=8500;lr=on>..To: <sip:18742 at 172.16.22.25:5060>..Fr
om: "Interaction Center" <sip:8475787000 at GLCU.ORG;type=ICConnectionCall>;ta
g=8500..Via: SIP/2.0/UDP 172.16.22.25;branch=z9hG4bK7377.54324bd5.0..Via: S
IP/2.0/UDP 130.110.72.16..CSeq: 1 CANCEL..Call-ID: 198f7c0ca5c28e7f59759c1f
1c024617 at 130.110.72.16..User-Agent: ININ-EICSRVR01-99879649..Content-Length
: 0....

U 2004/11/08 15:10:47.986990 172.16.22.25:5060 -> 172.31.22.12:5060
CANCEL sip:18742 at 172.31.22.12 SIP/2.0..Max-Forwards: 10..Record-Route: <sip
:18742 at 172.16.22.25;ftag=8500;lr=on>..To: <sip:18742 at 172.16.22.25:5060>..Fr
om: "Interaction Center" <sip:8475787000 at GLCU.ORG;type=ICConnectionCall>;ta
g=8500..Via: SIP/2.0/UDP 172.16.22.25;branch=z9hG4bK7377.54324bd5.0..Via: S
IP/2.0/UDP 130.110.72.16..CSeq: 1 CANCEL..Call-ID: 198f7c0ca5c28e7f59759c1f
1c024617 at 130.110.72.16..User-Agent: ININ-EICSRVR01-99879649..Content-Length
: 0....

U 2004/11/08 15:10:48.124132 130.110.72.16:1136 -> 172.16.22.25:5060
CANCEL sip:18742 at 172.16.22.25:5060 SIP/2.0..To: <sip:18742 at 172.16.22.25:506
0>..From: "Interaction Center" <sip:8475787000 at GLCU.ORG;type=ICConnectionCa
ll>;tag=8500..Via: SIP/2.0/UDP 130.110.72.16..CSeq: 1 CANCEL..Call-ID: 198f
7c0ca5c28e7f59759c1f1c024617 at 130.110.72.16..User-Agent: ININ-EICSRVR01-9987
9649..Content-Length: 0.... 

-- 
Jamin W. Collins

"Never underestimate the power of very stupid people in large groups."
-- John Kenneth Galbraith