Circuit Switched Data (CSD) Support
This would primarily entail:
- permitting the related bearer types on the 04.08 CC side
- configuring the DSP correctly to perform the 45.003 interleaving / coding for the respective bearer type
- implementing the various rate adaptation functions to get to the individual sync/async characters. AFAIR there even was a hardware accelerator (maybe that was only MTK, not TI?). In any case, we want a software implementation on the host PC side, we don't care about an efficient implementation on the baseband chip.
Test/development could be done against Racal 6103, which supports both data + fax calls