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Hello, I have an * server configured with a voip provider
and an ISDN BRI backup line. When Internet is down, internal SIP calls or ISDN calls
fails. I have analysed some internal sip traffic and
asterisk doesn’t answer fast enough to phones. It sends DNS queries to find voip provider IP but as
Internet is down, results are never returned. I have tried to upgrade from * 1.0.9 to 1.2.5 without
results. I have also tried to install a DNS cache on my * box
but after a moment, internal calls fail. Another problem with DNS cache is that cache is empty
when I restart the server. Hardcoding IP in /etc/hosts works but it’s not
reliable if voip provider’s IP change. Does someone already as a similar problem and
resolved it? |
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