On Mon 13 Jun 2011 at 22:02:17 +1000, Scott Ferguson wrote:

> On 13/06/11 20:37, Brian wrote:
> > On Mon 13 Jun 2011 at 17:49:23 +1000, Scott Ferguson wrote:
> > 
> >> Note: shouldn't need to supply your ISPs APN - the modem should have,
> >> and supply that when it connects.
> > 
> > Are you sure? I thought the APN determined the type of service requested
> > or obtained.
> 
> It does (another poster has answered this question for you).

I can see how authentication is via the SIM (rather than a username and
password in the chatscript), but where does the APN fit in? It appears
to me it is needed for the very first connection. After that (in the
case of my ISP) it seems it can be omitted, presumably because the SIM
is matched with the right type of account.

It gets interesting if the APN is changed to an invalid one. No further
connections are possible until the correct one is entered. After that it
can be ommited. Is this behaviour general with mobile broadband?


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