[Asterisk-Users] Snom high SIP ping time

[Steven Ringwald]

Steve Glaus wrote:
> Mike Hammett wrote:
>> I don't know everything that's going on as someone else has been 
>> working on the project, but it hasn't really been going anywhere, so 
>> I had some questions.
>>  
>> We've got some Snom 320s with Asterisk 1.2.9.1 (I believe).  All was 
>> well (with a previous release), but the phones started to get real 
>> choppy.  We are also running a softphone at this location and it was 
>> fine.  The SIP qualify was returning ping times anywhere from 20 to 
>> 70 ms over a sparsely used LAN.  Command prompt (ICMP) pings were 
>> under 1 ms.  No amount of different Asterisk versions or phone 
>> firmware revisions seems to solve this.  All was well, then (as far 
>> as we know) without changes, it crapped out.
>>   
> I'm having much the same issues only I'm using Cisco 7960 phones. When 
> I do a 'sip show peers' I'm getting times in excess of 300ms. A soft 
> phone on the same network (x-lite), is reporting times of 4 ms. 
> Related to this (I think), I'm getting audio issues. The person being 
> called can hear the caller fine but the callee's voice drops in and 
> out excessively.
>
> I have qualify set to yes in the sip definitions for all the clients 
> (Including the soft phone). Does anyone know what is causing this. I'm 
> not aware what the sip ping times were earlier, but the audio issues 
> seemed to have started spontaneously.
>
> Anyone  have any idea regarding this? 


What codecs are you using? I have noticed that g729, for some reason, 
adds a lot of latency to the phone. Running on uLaw, however, I get 
times from sip show peers of around 5-14ms.

Steve