Erik, Possible cause of the issue is your firewall port map time out is shorter then your registration time or your firewall is exceeding it's with port map count, and releasing the older ones to stay within it's limit. Easy solution would be to shorten your extensions registration timeout.
Hope that helps, Mike On Wed, Oct 17, 2012 at 9:27 AM, <[email protected]> wrote: > This is a weird one for me. We're using a hosted PBX flavour (Bicom > systems) and something has changed on the LAN that is causing various > extensions to not be registered all the time. The only thing that > appars to have changed is the removal of Exchange from the LAN to a data > center. There is a VPN tunnel up, but only the traffic destined for > Exchange is fired down the tunnel, everything else goes out the ISP's > gateway. At night when there's no traffic the extensions all seem to > register, but in day 2-5 extensions will be unreachable for inbound. Of > course they call outbound because the extension will authenticate fine. > > > The phones are all Aastra, mostly 6753 I believe, but all about a year > and a half old. The firewall is a SonicWall and was installed previosly > without problems until the Exchange got moved off site. > > > Any insight is greatly appreciated. > > > Erik. > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [email protected] > For additional commands, e-mail: [email protected] > > -- Mike Ashton CTO Quality Track International Phone: +1 647.724.3500 x251 Cell: +1 416.527.4995
