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6 second delay before placing call - NAPTR and SRV lookups even when disabled.


We have a problem with some D715s running

When a call is dialed, there is a 6 second delay before the handsets place the call. The logs show:

May 23 15:36:10.515 [ERROR ] PHN: No reply for naptr lookup
May 23 15:36:13.669 [ERROR ] PHN: No reply for srv lookup

We were advised to set:


which according to should solve the problem.

Changing the registrar from a FQDN to an IP address does remove the delay, but I really would rather provision a server name rather than address.

Any ideas?



1 Comment

Dear Nicholas,

thanks for contacting us,

If the DNS query takes so long usually is because the firewall is silently dropping the DNS requests (or the DNS server doesn't answer), so the phone waits for the connection timeout.

Isn't clear to me if dns_a_queries_only=on solved your issue or not..

Can you articulate a bit more ?

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