[Asterisk-Users] Grandstream Budgetone SIP registration fails

[Olle E. Johansson]

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.


/Olle