[asterisk-dev] SIP register expiry timer

[Joshua Foshee]

I have a Asterisk 1.6.2.6 box that is sip trunking with Broadvoice.

Broadvoice says that I am sending in register request too many times and
they are blocking my IP address from being able to register some times.
I looked into it and I am registing every 30 sec. 

I have my sip.conf file setup with this settings.

maxexpirey=3600
defaultexpire=1800
Asterisksiprtautoclear=no
register =>
40523xxxxx at sip.broadvoice.com:xxxxxxxxx:40523xxxxxx at sip.broadvoice.com

But it still regestes every 30 sec. I then did a debug and found that
the SIP register statments from their boarder controller has this

Retransmitting #1 (no NAT) to 206.15.140.221:5060:
REGISTER sip:sip.broadvoice.com SIP/2.0
Via: SIP/2.0/UDP 98.174.176.x:5060;branch=z9hG4bK577ca1b1;rport
Max-Forwards: 70
From: <sip:40523xxxxx at sip.broadvoice.com>;tag=as3964d4ae
To: <sip:40523xxxxxx at sip.broadvoice.com>
Call-ID: 0c12c7af3626edd018e8995631a059f2 at sip.broadvoice.com
CSeq: 114 REGISTER
User-Agent: Asterisk PBX 1.6.2.6
Authorization: Digest username="40523xxxxxx", realm="BroadWorks",
algorithm=MD5, uri="sip:sip.broadvoice.com",
nonce="BroadWorksXg8ryetv1Tfxpv44BW",
response="5dfb67f0e3826dd0549e6c331ef20fbc", qop=auth,
cnonce="132c7d00", nc=0000000c
Expires: 120
Contact: <sip:s at 98.174.176.x>
Content-Length: 0

<--- SIP read from UDP:206.15.140.221:5060 --->
SIP/2.0 200 OK
Call-ID: 0c12c7af3626edd018e8995631a059f2 at sip.broadvoice.com
CSeq: 114 REGISTER
From: <sip:40523xxxx at sip.broadvoice.com>;tag=as3964d4ae
To: <sip:40523xxxx at sip.broadvoice.com>
Via: SIP/2.0/UDP 98.174.176.x:5060;branch=z9hG4bK577ca1b1
Contact: <sip:s at 98.174.176.x>
Expires: 30
Content-Length:    0

Retransmitting #2 (no NAT) to 206.15.140.221:5060:
REGISTER sip:sip.broadvoice.com SIP/2.0
Via: SIP/2.0/UDP 98.174.176.x:5060;branch=z9hG4bK577ca1b1;rport
Max-Forwards: 70
From: <sip:40523xxxxx at sip.broadvoice.com>;tag=as3964d4ae
To: <sip:40523xxxxx at sip.broadvoice.com>
Call-ID: 0c12c7af3626edd018e8995631a059f2 at sip.broadvoice.com
CSeq: 114 REGISTER
User-Agent: Asterisk PBX 1.6.2.6
Authorization: Digest username="40523xxxxx", realm="BroadWorks",
algorithm=MD5, uri="sip:sip.broadvoice.com",
nonce="BroadWorksXg8ryetv1Tfxpv44BW",
response="5dfb67f0e3826dd0549e6c331ef20fbc", qop=auth,
cnonce="132c7d00", nc=0000000c
Expires: 120
Contact: <sip:s at 98.174.176.x>
Content-Length: 0

<--- SIP read from UDP:206.15.140.221:5060 --->
SIP/2.0 200 OK
Call-ID: 0c12c7af3626edd018e8995631a059f2 at sip.broadvoice.com
CSeq: 114 REGISTER
From: <sip:40523xxxxx at sip.broadvoice.com>;tag=as3964d4ae
To: <sip:40523xxxxxx at sip.broadvoice.com>
Via: SIP/2.0/UDP 98.174.176.x:5060;branch=z9hG4bK577ca1b1
Contact: <sip:s at 98.174.176.x>
Expires: 30
Content-Length:    0

So it looks like they are overriding my default timer. Is there a way to
override their response so I only regester every 1800 sec?

Thanks,
Josh