We have a customer with a handful of Sayson/Aastra 480i phones behind a Juniper Networks Netscreen firewall registering with our hosted PBX service. 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. Has anyone else experienced this. We are setting up ethereal to monitor things to collect more information but are hoping others might be able to shed some light on this. g.
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.
> Has anyone else experienced this. We are setting up ethereal to monitor > things to collect more information but are hoping others might be able > to shed some light on this.Yup George I get a similar issue by rebooting the pbx, and not having it register again + the busted redial button, & xfer buttons. & feature wise where is the xml UI for SIP generic & a proper local directory but the 9 line appearances are nice :)
George Pajari wrote:> 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. >Even behind regular home Linksys router that doesn't close the mapping the Aastra's attached to our network seemingly randomly stop registering and say "No Service" on the screen. No other devices we're using have this problem..