[SIPForum-discussion] RPID in ACK

[Samir Patni]

Hi 

 

Few days back I came across a good document comparing SIP and H.323 for internet telephony by Dr. Henning Schulzrinne and Dr. Jonathan Rosenberg. Please find it below. 

 

http://sipforum.org/pipermail/discussion/attachments/20050715/499b84d3/attachment.obj

 

Regards, 

Samir Patni

 

  _____  

From: discussion-bounces at sipforum.org [mailto:discussion-bounces at sipforum.org] On Behalf Of Duong Van Ti?n
Sent: Wednesday, June 25, 2008 9:58 PM
To: yasser elazab
Cc: discussion at sipforum.org
Subject: Re: [SIPForum-discussion] RPID in ACK

 

i want to have document about SIP security. And how SIP work, how SIP secure. And SIP have more advance than H.323 ?

2008/6/25 yasser elazab <yasserelazab at hotmail.com>:



--------------------------------------------------
From: "Raj Jain" <rj2807 at gmail.com>
Sent: Wednesday, June 18, 2008 1:14 PM
To: <raghul82 at yahoo.co.uk>
Cc: <discussion at sipforum.org>
Subject: Re: [SIPForum-discussion] RPID in ACK

> On Tue, Jun 17, 2008 at 6:23 PM, Raghul Prasanna <raghul82 at yahoo.co.uk>
> wrote:
>>  I have a scenario were calls to Verizon are getting rejected. When I
>> looked
>> at the ethereal I found that we are sending ACK to 200 OK from Verizon.
>> But
>> they keep sending us 200 OK and we respond to it everytime and finaly
>> they
>> time out.
>>
>>
>>
>>  When I checked with Verizon they said that we dont send RPID in ACK. I
>> have
>> never come across this scenario were RPID needs to be sent in ACK. I
>> thought
>> its sent in Invite message which we do.
>>
>>
>>
>>  Does anyone know if there is any spec which states that RPID shd be sent
>> in
>> ACK?
>
> RPID is a long expired internet-draft. Here is a link to the draft:
> http://tools.ietf.org/id/draft-ietf-sip-privacy-04.txt. The table in
> section 6 in this shows that the header is not defined for the ACK
> method. I doubt that RPID missing in the ACK is the reason why you've
> 200/ACK retransmissions. Typically, you have these retransmission
> problems due to messages not reaching the destination or
> transaction/dialog mismatching.
>
> --
> Raj Jain
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