Hello Looking for some help with a rather odd problem. We have Asterisk 1.4.10 running on a Linux box, within our Windows domain. Our Domain Controller is a Windows 2003 server, providing the normal Windows domain functions, such as DHCP and DNS. When we lose either our Domain Controller (for a reboot/maintenance) or external ADSL access, Asterisk drops all SIP registrations - even internal SIP calls within the building no longer function. All of our SIP clients are assigned static IP addresses, and our incoming lines are via a Zaptel card using (currently) analog lines from our national telco. When the SIP registrations drop, Asterisk will still answer incoming calls via the Zap channels, but can't forward them anywhere. What is most confusing is a recent issue when our ADSL connections were all offline, and despite everything internal to the network working perfectly, all of the SIP phones stopped working and left us without phones for 4 hours. I'm suspecting that these two issues (losing connectivity when DC is unavailable and losing connectivity when ADSL drops) are related, but I can't figure out how? I'm sure I'm missing something simple in the config, but I've been tinkering with this issue since we were using Asterisk 1.2 and I've still not resolved it. Any help or comments would be appreciated... Thanks in advance Phil Phil Knighton
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