Hi Paul, There is no way for ser to know whether the old phone is updating from a new IP or if a second phone is trying to register. The second attempt will receive an error message with something like "max contacts has been reached" if I recall correctly. Dependent on the register interval you use for your UAs this is probably not an issue (unless the interval is long). We had a discussion on the list a while back on what would be appropriate register expiry times. I think it was Jan Janak who suggested 10 minutes as a compromise between load reduction and NAT restart (as the NAT may give the phone behind NAT a new port number) and other contact-related issues. g-)
Java Rockx wrote:
Hi All.
Can anyone tell me what happens if max_contacts() is set to one (1) and you register a SIP phone then move the same SIP phone to another network?
Does the old contact record get deleted, or would the phone not be able to re-REGISTER until the first contact record expires?
Regards, Paul
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