OsmocomBB.TCH.

Sylvain Munaut 246tnt at gmail.com
Mon Oct 4 22:15:05 UTC 2010


> BTW, I still do not fully understand what Marten wants to do:

I think he wants to turn the GSM into a simple two way radio /
talkie-walkie, making two phones talk directly together on a TCH.
(with only 2 devices)

If both are pre-aligned on the same cell and if you appropriately set
the uplink/downlink frequencies, and make sure there are tracking for
frequency offset/toa it could work. But it's way more complex than
just 'opening' a TCH with L1CTL, and without a good undertanding of
how to setup all that ...

I had thought of this some time ago and its among my 'list of fun
thing to try', but I didn't quite get to it yet ...

Cheers,

    Sylvain




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