[SIPForum-discussion] record route

[Franz Edler]

Hi,

> So in general is it true that Servers can introduces new parameters to any
> header field even though they are not in the specification.

No; not in general to any header field, but to Record-Route. Because the
content of the Record-Route header field is copied onto the Route header
field and the Route header field is only relevant for the server addressed
by the Route header field.

> All the sip entities which do not understand the parameter should ignore
> the same.

That's also not true. There are certain rules haow to handle unrecognized
headers and parameters. Be aware of Require and Proxy-Require header fields.

Franz