Calls between cell phones

historical

On Wed, Apr 08, 2009 at 07:01:50PM +0200, Marcel Klein wrote:
> Hi,
> 
> I'm starting a new thread because it's a new topic... ;)
> 
> Harald Welte wrote:
> > it has all been implemented quite some time ago.  Used to work fine 
> > here, though I haven't tested it since about one month ago.  We can 
> > have multiple concurrent voice calls between two handsets, as soon as
> > you have the IMSI provisioned with an extension in the database,
> > i.e.
> 
> > UPDATE subscriber set extension=1001 where id=1; 
> > UPDATE subscriber set extension=1002 where id=2;
> 
> > and then you can call 1002 from the handset with id1 and vice-versa.
> 
> assigning extensions to connected cell phones works fine and I tried
> calling.  The other phone rings and I can take the call but voice
> transmission doesn't seem to work (I don't know if it's supposed to work
> yet. :D).

the voice transmission is supposed to work.  Sometimes it is unreliable,
terminate the call and call again.  It only works between EFR capable phones,
and only with those that support very early assignment.  I've had good results
with Nokia DCT3 (3310, 3330, etc.) type phones, but lately also got my Motorola
EZX phones to work.

On the other hand, some Motorola P2K (e.g. RAZR) are known to cause problems.

-- 
- Harald Welte <laforge at gnumonks.org>           http://laforge.gnumonks.org/
============================================================================
"Privacy in residential applications is a desirable marketing option."
                                                  (ETSI EN 300 175-7 Ch. A6)
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