Re: [Serusers] Question about general SIP timers in production enviroments.

Ricardo Martinez wrote:

Hello list. Does someone knows which are the best or most common timers for :

• REGISTER Expire? How often i send the REGISTER message to SER.

I have no clue, but I guess that should be decided based on the size of your user base and what type of customers you have ie how often do they re-register from a new IP etc.

• If i'm behind a NAT and i am sending NOTIFY messages to mantain

the bind open, which is the optimal timer for this NOTIFY messages?

This varies with the NAT implementation and also if you use TCP or UDP on the UAC/UAS, I guess. TCP usually got a higher timeout value in the NAT devices than UDP, the devices I have worked with, have used 180 seconds for UDP timeout in the NAT table, so less than that atleast if you use NAT and ZyNOS based devices.

Pedro