asterisk users - Jan 2004 - h323 with innovaphone ip 400 gatekeeper/innovaphone Ip200 phones

Hi,

I'm trying to get h323 communication working between asterisk (0.7.1) and
Innovaphone Gatekeeper + innovaphone phones.

chan_323 installed OK with currently recommended pwlib_1.5.2 and
openh323_1.12.2.

Registration asterisk with the gatekeeper works OK, externsion for my
test(sip) phone gets registered with gatekeeper. when establishing a call
between a h323 phone and asterisk I run into problems however (regardless of
direction - doesn't matter who and who answers):

While asterisk can receive audio from the h323 phone quite fine, reverse
doesn't work.

After a few seconds, connection is disconnected with error message: -- Could
not find common codec with 514

I know - talking to myself is a bad sign, but still:
>While asterisk can receive audio from the h323 phone quite 
>fine, reverse doesn't work.
Added information: when turning up h.323 tracing, I get this:

channels.cxx(777) LogChan Bandwidth requested/used = 64.0/0.0 kb/s
h323.cxx(4419)    H323    Bandwidth request: -0.0kb/s, available: 32.0kb/s
h323.cxx(4419)    H323    Bandwidth request: +64.0kb/s, available: 32.0kb/s
h323.cxx(4425)    H323    Available bandwidth exceeded

The 64kb/s is the bandwidth requirement for g711u (which is the selected
codec); I don't understand where the available bandwidth of 32kb/sec comes
from though, but it's definitely the cause for my failures.

Now to find out where that limit comes from..

Bye, Martin