[Asterisk-Users] '500 Internal Server' Error on SIP NOTIFY

[Douglas Garstang]

Is anyone getting '500 Internal Server' errors back from their Polycom phones when Asterisk sends a SIP NOTIFY message to them?
I called Polycom tech support, who where utterly useless.
Of course Polycom won't officially support it anyway, as they only support Asterisk Business Edition. We're using 1.2.9, but it's been ocurring for quite some time. We have about 35 phones and it's happening on most (also on the few running SIP software 1.6.6).

SIP Software version: 1.6.3.0067
BootROM version: 2.6.2.0032
 
Reliably Transmitting (no NAT) to xxx.187.128.95:5060:
NOTIFY sip:2944030 at ua1.ipt.oneeighty.com SIP/2.0
Via: SIP/2.0/UDP xxx.187.142.203:5060;branch=z9hG4bK4d777013;rport
From: <sip:2944026 at ua1.ipt.oneeighty.com>;tag=as6fd80d1b
To: "Front Desk" <sip:2944030 at ua1.ipt.oneeighty.com>;tag=3B576862-120A3007
Contact: <sip:2944026 at xxx.187.142.203>
Call-ID: 5d22385e-d097d068-93894e55 at xxx.187.128.95
CSeq: 114 NOTIFY
User-Agent: Asterisk PBX
Max-Forwards: 70
Event: presence
Content-Type: application/xpidf+xml
Subscription-State: active
Content-Length: 371
 
<?xml version="1.0"?>
<!DOCTYPE presence PUBLIC "-//IETF//DTD RFCxxxx XPIDF 1.0//EN" "xpidf.dtd">
<presence>
<presentity uri="sip:2944030 at ua1.ipt.oneeighty.com;method=SUBSCRIBE" />
<atom id="2944026">
<address uri="sip:2944026 at ua1.ipt.oneeighty.com;user=ip" priority="0.800000">
<status status="open" />
<msnsubstatus substatus="online" />
</address>
</atom>
</presence>
 
 
<-- SIP read from xxx.187.128.95:5060: 
SIP/2.0 500 Internal Server Error
Via: SIP/2.0/UDP xxx.187.142.203:5060;branch=z9hG4bK4d777013;rport
From: <sip:2944026 at ua1.ipt.oneeighty.com>;tag=as6fd80d1b
To: "Front Desk" <sip:2944030 at ua1.ipt.oneeighty.com>;tag=3B576862-120A3007
CSeq: 114 NOTIFY
Call-ID: 5d22385e-d097d068-93894e55 at xxx.187.128.95
Contact: <sip:2944030 at xxx.187.128.95>
Event: presence
User-Agent: PolycomSoundPointIP-SPIP_601-UA/1.6.6.0036
Content-Length: 0
 
Doug.