Registering With Ua Support - Snom 4S NAT Filter Admin Manual

Contact: <sip:217.115.141.99:5082;ua=c9b140ab59829bb491e9c3aaca440>
Supported: gruu
User-Agent: snom200-2.03w
Expires: 86400
Content-Length: 0
SIP/2.0 200 Ok
Via: SIP/2.0/UDP 217.115.141.99:5082;branch=z9hG4bK-e8d1feb8138c3d85
0637ced821ef40a3;ua=c9b140ab598290e5bb491e9c3aaca440
Via: SIP/2.0/UDP 203.145.183.113:12975;branch=z9hG4bK-
abx3au3mxb01;rport=17401
From: "denny" <sip:denny@snomag.de>;tag=k9p6fmeg7h
To: "denny" <sip:denny@snomag.de>;tag=epuy85kzm5
Call-ID: 3c26701d7cb9-pady07b5783t@203-145-183-113
CSeq: 14 REGISTER
Contact: <sip:217.115.141.99:5082;ua=c9b140ab598290e5bb491e9c3aaca44
0>;expires=3600;gruu="sip:denny@snomag.de;gruu=hobiv52b"
Date: Wed, 26 May 2004 16:03:33 GMT
Server: snom proxy (Unix) 2.42.6
Content-Length: 0
SIP/2.0 200 Ok
Via: SIP/2.0/UDP 203.145.183.113:12975;branch=z9hG4bK-
abx3au3mxb01;rport=17401
From: "denny" <sip:denny@snomag.de>;tag=k9p6fmeg7h
To: "denny" <sip:denny@snomag.de>;tag=epuy85kzm5
Call-ID: 3c26701d7cb9-pady07b5783t@203-145-183-113
CSeq: 14 REGISTER
Contact: <sip:denny@203.145.183.113:12975;line=lhynyb3y>;expires=360
0;gruu="sip:denny@snomag.de;gruu=hobiv52b"
Server: snom proxy (Unix) 2.42.6
Date: Wed, 26 May 2004 16:03:33 GMT
Content-Length: 0

2.3.2 Registering with UA Support

Leaving the refreshing of the UDP binding to NAT Filter usually
will keep the connection alive. However, it is better if the user agent
refreshes the binding:
• When the user is taken off the network the NAT Filter does not gen-
erate unnecessary refreshes. The same happens when for example
the DSL router is turned off.
16 • Architecture
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