[Serusers] registrar module max_contacts()

[Greger V. Teigre]

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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