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DNS registration


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Well, the RFC DNS idea was that the clients always look up the DNS records. The problem is that the overall uptime now depends on the stability of the SIP server AND of the DNS server. We also had numerous discussions on this forum why the SIP trunks go down from time to time when service providers choose TTL of 60 seconds for their entries...

 

Anyway, I depends on the vendor. Our strategy is to use DNS for the provisioning, but then use IP for the outbound proxy. This way, if the service provider really has to move the service from one server to another, a re-provisioning of the phone will be sufficient--and we don't have to worry about DNS problems with the handsets.

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