HELP: anyone out there know how v.32 GSM data calls work p..

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Hi,

I'm trying to setup a transparent V.32 GSM data connection between 2
PCs each equipped with a GSM terminal adaptor. Unfortunatley we are
seeing erratic behaviour such as the insertion of garbage data and
early connects. This problem isn't related to the terminal adaptor at
the PC as the same erratic behaviour happens with many different
terminal adaptors. To get a handle on what's happening at a call
control level from the MSC/IWF to Terminal Adaptor at the PC, i've
been wading through lots of GSM documentation.

I understand as far as both sides are connected and an end-end virtual
circuit has been established as per GSM.4.08 (i.e.
set-up/alert/connect/connect-ack at the originating side and
setup/call-conf/connect/connect-ack at the terminating side). This is
simillar to the call control signalling as in a GSM voice call. Once
the call signalistion phase for setting up the physical end-end
circuit is complete and the modems in the IWF can now start training.

Where I'm confused is on completion of V.32 training by the 2 modems,
how does each V.32 modem notify the terminal adaptor that training is
complete and thereby connected? Any information please or some
pointers to the relevalent documentation would be really appreciated.

Thanks a million,
Don