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RE: [Sip] SIP Identity using Media Path

> > >     <--- Enterprise-A ---->
> > >     clients --- PBX --- SBC --- SP1-SBC-1 --- SP1-SBC2 ----+
> > >                                                            |
> > >     +------------------------------------------------------+
> > >     |
> > >     |                              <--- Enterprise-B ---->
> > >     +--- SP2-SBC1 --- SP2-SBC2 --- SBC --- PBX --- clients
> > 
> > True.  I'll figure out a clearer way to diagram that.
> 
> Possibly it gets better if done up-down instead of left-right.

I'll fire up Jave and draw circles.

> > > Section 3, "mailto URLs" para:
> > > 
> > > sp1.net and sp2.net (and, later in the document, sp3.net) 
> are (or at
> > > least could be) real domains that shouldn't be used.
> > 
> > Agreed; I may go with "sp1.example.net" and "sp2.example.net", 
> > although this is less clear than using unique top-level domain 
> > names.
> 
> Perhaps it would be clearer to use for instance sp1.example.com,
> sp2.example.net and sp3.example.org.

That would work; thanks for the suggestion.

> > > Section 4.1, item about Contact:
> > > 
> > > How can the Contact header usefully be used in the 
> signing process? An
> > > SBC along the message path will happily replace it.
> > 
> > I have removed that in -01 (which isn't yet published, of 
> course).  There
> > was some thought it was necessary, but I agree it should be removed
> > from the signature.
> > 
> > On a similar note, I am considering removing CallId from 
> the signature.
> > Oftentimes the Call Id value contains an IP address (in 
> dotted decimal
> > or hex), and an SBC or B2BUA may also want to rewrite such 
> a CallId.  I
> > have made a note of that in -01 so this can be discussed.
> 
> I thought about that as well, but apparently I forgot about 
> adding it to
> my mail. I think it would be a good idea to take Call-ID out as well.

Ok, thanks.

-d

> Hans
> 
> -- 
> Hans Persson <hasse@xxxxxxxxxx>    Ingate - Firewalls with SIP & NAT
> Ingate Systems AB  +46 13 210877   http://www.ingate.com/
> 
> Private: <unicorn@xxxxxxxxxxxxxx>  
> http://www.lysator.liu.se/~unicorn/