[Asterisk-Users] Snom high SIP ping time

[Steve Glaus]

Steven Ringwald wrote:
> 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
>
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I'm using ulaw all the way.