Possible REGISTER bug

[Michael]

My phone is REGISTERing with an expiration of 60 seconds but pbxnsip responds back with 30 seconds.

 

U 74.135.77.234:50131 -> 198.88.216.101:5060
REGISTER sip:pbxnsip1.omnilec.com:5060 SIP/2.0.
Via: SIP/2.0/UDP 192.168.1.3;branch=z9hG4bK6096d6e87.
Max-Forwards: 70.
Content-Length: 0.
To: 3096700575 <sip:5076@pbxnsip1.omnilec.com:5060>.
From: 3096700575 <sip:5076@pbxnsip1.omnilec.com:5060>;tag=8ec6e2b1fda8d99.
Call-ID: fd841c9bdd3938d167f2f06bd8b4280b@192.168.1.3.
CSeq: 1885941212 REGISTER.
Contact: 3096700575 <sip:5076@192.168.1.3>;expires=60.
Allow-Events: talk,hold,conference.
Allow:NOTIFY,REFER,OPTIONS,INVITE,ACK,CANCEL,BYE,INFO.
Authorization:Digest response="9f6a0b6fb7cb9760e3a4d3cb5aa3807e",nonce="74239c09926f0a36cef6261b5d9a9b90",username="5076",realm="pbxnsip1.omnilec.com",algorithm=MD5,uri="sip:pbxnsip1.omnilec.com:5060".
User-Agent: Aastra 9133i/1.4.1.1077 Brcm Callctrl/1.5.1.0 MxSF/v3.2.6.26.
.

#
U 198.88.216.101:5060 -> 74.135.77.234:50131
SIP/2.0 200 Ok.
Via: SIP/2.0/UDP 192.168.1.3;branch=z9hG4bK6096d6e87;rport=50131;received=74.135.77.234.
From: 3096700575 <sip:5076@pbxnsip1.omnilec.com:5060>;tag=8ec6e2b1fda8d99.
To: 3096700575 <sip:5076@pbxnsip1.omnilec.com:5060>;tag=5219c0a200.
Call-ID: fd841c9bdd3938d167f2f06bd8b4280b@192.168.1.3.
CSeq: 1885941212 REGISTER.
Contact: 3096700575 <sip:5076@192.168.1.3>;expires=30.
Content-Length: 0.

[Vodia PBX]

Well the phone sends the registration from a private IP address to a public IP address. So it needs to refresh the binding then. This is achieved by keeping the registration time short.

 

See http://wiki.pbxnsip.com/index.php/Overall_...ngs#Performance.