asterisk users - Feb 2005 - Zaptel (Junghanns 4BRI card) to cell phone problem

We have set up an HP DL380 with 3 4BRI cards, Fedora core 2 (kernel 2.6.10)
and asterisk (bristuff-0.2.0-RC7f with asterisk 1.0.5). 4 ports are
configured in TE mode and connected to the PSTN; the other 8 are in NT mode
and connected to isdn phones.

the other outbound calls to PSTN are fine, however, when we call cellular
phones, often audio is one-way (i.e.: the cell phone user can not hear,
while the speaker at the internal side hears perfectly.

CPU usage is quite low, and asterisk -rvvv does not show anything particular

Any suggestion

On Wed, 2005-02-23 at 14:22 +0100, Roberto Piola wrote:
> We have set up an HP DL380 with 3 4BRI cards, Fedora core 2 (kernel 2.6.10)
> and asterisk (bristuff-0.2.0-RC7f with asterisk 1.0.5). 4 ports are
> configured in TE mode and connected to the PSTN; the other 8 are in NT mode
> and connected to isdn phones.
> 
> the other outbound calls to PSTN are fine, however, when we call cellular
> phones, often audio is one-way (i.e.: the cell phone user can not hear,
> while the speaker at the internal side hears perfectly.
> 
> CPU usage is quite low, and asterisk -rvvv does not show anything
particular
In South Africa, I have a 4-port ISDN BRI (Euro-ISDN) with bristuff.
Calls to Cell phones are no different to any other call...

I also added a Digium 4-port analogue card - and have a 'PremiCell'
connected to a Trunk line. The PremiCell is a fixed cell device that
gives dial-tone in the same way that a Telcom Trunk line would work -
except there is no copper to he exchange - just a stubby cellphone
antenna.  In South Africa it is MUCH MUCH cheaper to make a Cell to Cell
call than from Telcom to Cell.... 

I'm surprised that more people do not put down a 'PremiCell' type
device
and route all Cell calls out through it...  
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