Well, I thought I had the problem solved. Ported everything over to
PJSip and build RDNS records for the phones and the server, but I am
still experiencing the problem on incoming calls.
**
On 6/7/2016 1:00 PM, Faheem Muhammad wrote:
I've faced the same issue. The issue was related to DNS, the reverse
lookup query failure caused the delay around(7-9 seconds). The purpose
of reverse lookup is to block IP Spoofing attacks.
Regards,
Faheem
On Tue, Jun 7, 2016 at 7:48 PM, Brent Davidson
<[email protected] <mailto:[email protected]>> wrote:
I am having an issue with a couple of phones where they ring, but
there is a long delay after the phone is picked up before the
audio starts.
My setup:
* Server running Asterisk 13.9.1, Dahdi 2.11.1 w/ OSLEC
* Server is CentOS 7
* Quad core CPU with 16GB Ram
* 2 Snom 300 phones.
* NO NAT. Server and phone are on the same subnet with only a
gigabit switch between them.
* Digium TDM400 analog card with 2 incoming analog PSTN lines
When a call comes in, the system answers, IVR plays, caller dials
an extension, Snom 300 rings, handset picked up. Caller continues
to hear ringing for another 7 to 10 seconds. Answerer hears a
click, a quick burst of audio, then silence, then another click
and audio is engaged.
I have tried both SIP and RTP debugging and there are absolutely
no messages indicating any timeout or retransmit. I am at a total
loss. In the past I've always been able to find an answer to
issues like this on my own, but this time I just don't know. I
was even beginning to suspect the network switch might be bad, but
pinging between the server and the phones shows no packet loss and
0.969ms average response time.
What am I missing*?*
Thanks,
Brent Davidson*
*
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