[Asterisk-Users] Sayson 480i Fails to Re-register?

[Kevin P. Fleming]

George Pajari wrote:

> The Netscreen monitors the REGISTER messages and only keeps the reverse
> mapping open for the duration of the registration period. It appears
> that every so often the Sayson does not send out another REGISTER
> message after the registration has expired resulting in the reverse
> mapping being closed and the phone made unreachable.

If you want the mapping to stay open, the simplest way is to set 
'qualify=5000' or so in your sip.conf file, so that Asterisk will 
periodically ping the phone.