[Asterisk-Users] RTP timestamps

[Brian Cuthie]

Excellent!  I'll give it a shot.

-brian

brian k. west wrote:

>This time stamp issue is all gone.. now if everyone will just UPDATE!
>
>bkw
>
>----- Original Message ----- 
>From: "Andres" <andres at telesip.net>
>To: <asterisk-users at lists.digium.com>
>Sent: Friday, May 21, 2004 4:14 PM
>Subject: Re: [Asterisk-Users] RTP timestamps
>
>
>  
>
>>>VC:  My phone is broken: I get no audio.
>>>TAC: Show us a network trace.
>>>VC:  (presents my ethereal traces, with the non-counting RTP timestamps)
>>>TAC: (laughing) NEXT!!!
>>>
>>>I have not read RFC1889 (RTP) in detail, but I am positive that the
>>>timestamp field was put there for a reason.  Sure, maybe Cisco is a
>>>      
>>>
>little
>  
>
>>>overzealous in the way their code handles non-conformance, but to try and
>>>put the blame entirely on them is misdirection.  My ATA-186 has problems
>>>with the same RTP stream.  GIGO.
>>>
>>>* needs to generate RTP streams with valid timestamp progression -- 
>>>      
>>>
>surely
>  
>
>>>we're not happy to say "the Cisco 79x0 is the only phone that cares about
>>>timestamps, so there's the problem".
>>>
>>>
>>>      
>>>
>>Hi Vic,
>>
>>For your information Sipura also suffers from the Timestamp issue.  3
>>months ago when I opened the case with them, they explained in detail
>>why they needed those Timestamps (it has to do with the jitter buffer
>>calculation algorithms).  They told me the problem had to be solved at
>>the Asterisk side since there is no reason why the Timestamps should
>>change.  They have not seen this weird behaviour with any other SIP
>>system besides Asterisk.  In any case, thats why we came up with the
>>rtp.c hack, and have been happy ever since.
>>
>>-- 
>>Andres
>>Network Admin
>>http://www.telesip.net
>>
>>
>>
>>_______________________________________________
>>Asterisk-Users mailing list
>>Asterisk-Users at lists.digium.com
>>http://lists.digium.com/mailman/listinfo/asterisk-users
>>To UNSUBSCRIBE or update options visit:
>>   http://lists.digium.com/mailman/listinfo/asterisk-users
>>
>>    
>>
>
>
>_______________________________________________
>Asterisk-Users mailing list
>Asterisk-Users at lists.digium.com
>http://lists.digium.com/mailman/listinfo/asterisk-users
>To UNSUBSCRIBE or update options visit:
>   http://lists.digium.com/mailman/listinfo/asterisk-users
>  
>