[Asterisk-Users] Grandstream Budgetone SIP registration fails

[Jean-Marc V. Liotier]

On Mon, 2004-03-08 at 18:50, Olle E. Johansson wrote:
> Jean-Marc V. Liotier wrote:
> > On Sun, 2004-03-07 at 13:03, Philipp von Klitzing answered off-list:
> > 
> >>>[6040]
> >>>defaultip=192.168.1.40
> >>
> >>Replace this with "host=dynamic" and see what happens.
> > 
> > That's it !
> > 
> > Thinking it was going to make things easier to diagnose, I had chosen to
> > set the phones with a static IP. Apparently, wether defaultip is set or
> > not, when the phone uses a static IP address, some assumptions are made
> > about authentication. I do not understand what they are and which side
> > assumes something, but it prevents SIP registration. Setting
> > host=dynamic even though I use static IP addresses solved the problem.
> > 
> > Many hours went into finding that out. If somebody has a clue about how
> > the a static IP address influences the SIP registration process, I would
> > be happy to know about it.
> 
> Registration is simply a way for a SIP device to tell the PBX "I'm here,
> place any calls to this IP address". To be able to do so, most configurations
> require the client to authenticate. If you configure a static address,
> the PBX already know how to reach the client and no registration is therefore
> needed (and not allowed in asterisk).
> 
> Enabling registration makes the SIP device mobile across the network.
> Configuring a static address locks it in.

Thanks for enlightening me. I'll put that in the wiki if it is not
already there.