[asterisk-users] Delay after Answer

Israel Gottlieb isrlgb at gmail.com
Wed Jun 8 02:07:59 CDT 2016


Are you using stun? I have seen that when using stun
בתאריך 8 ביוני 2016 09:54,‏ "Faheem Muhammad" <faheem2084 at gmail.com> כתב:

>
>
> Are you sure *nslookup <hostname> *command is returning as expected?
> Also check the output of the below command.
> >> hostname && hostname -s && hostname -f
>
>
> On Tue, Jun 7, 2016 at 11:54 PM, Brent Davidson <
> brent at texascountrytitle.com> wrote:
>
>> 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 <
>> brent at texascountrytitle.com> 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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>>
>>
>>
>> --
>> _____________________________________________________________________
>> -- Bandwidth and Colocation Provided by http://www.api-digital.com --
>> New to Asterisk? Join us for a live introductory webinar every Thurs:
>>                http://www.asterisk.org/hello
>>
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>>    http://lists.digium.com/mailman/listinfo/asterisk-users
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>
>
> --
> _____________________________________________________________________
> -- Bandwidth and Colocation Provided by http://www.api-digital.com --
> New to Asterisk? Join us for a live introductory webinar every Thurs:
>                http://www.asterisk.org/hello
>
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>    http://lists.digium.com/mailman/listinfo/asterisk-users
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