Basic questions on SIP should be directed to
[EMAIL PROTECTED]
Responses inline.
> -----Original Message-----
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
> Sent: Monday, August 20, 2001 3:41 AM
> To: [EMAIL PROTECTED]
> Subject: [Sip] SIP question: headers
>
>
> Dear all,
>
> I'm new in the domain of VoIP and SIP, and while reading SIP
> (RFC 2543) and
> RFC2543bis-04 I encountered a problem with the contents of table 4.
>
> The problem is how to understand the table correctly.
> For example: The first line specifies that the "allow" header
> can occur in
> all Request messages except in the ACK, because the WHERE
> column indicates
> R, and in each column related to an individual Request the
> "o" indicates
> that it is optional, except for the ACK. The second line
> specifies that it
> can occur in response 415, but how should I interpret the "o"
> fields in the
> columns concerning the Request messages (INVITE? REGISTER, ...) ?
These are responses to those particular requests. So, an o in the INVITE
column means that the header is optional in responses to INVITE.
>
> A second problem, related to this is that headers, marked as
> response (e.g.
> warning) also have the "o" (optional) indication in all
> Requests. Does this
> mean that this respone header could also be present in a Request ?
This means they can appear in responses to all request methods.
I will clarify this.
Thanks,
Jonathan R.
---
Jonathan D. Rosenberg, Ph.D. 72 Eagle Rock Ave.
Chief Scientist First Floor
dynamicsoft East Hanover, NJ 07936
[EMAIL PROTECTED] FAX: (973) 952-5050
http://www.jdrosen.net PHONE: (973) 952-5000
http://www.dynamicsoft.com
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