FreeCalypso > hg > fc-tourmaline
view doc/Modem-operation @ 300:edcb8364d45b
L1: resurrect TCH tap feature
In this new incarnation of our TCH tap feature, we support DL sniffing
in all 3 of FR1, HR1 and EFR, and the new implementation will capture
every 20 ms frame where the old one silently skipped a frame (sent
nothing) during FACCH stealing. The wire interface on RVTMUX changed
slightly, and fc-shell tch record will need to be updated to support
the new version.
TCH UL play or substitution is supported for FR1 and EFR only;
support for HR1 can be added later if needed.
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Tue, 13 Dec 2022 02:44:01 +0000 |
parents | a62e5bf88434 |
children |
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FC Tourmaline stdmodem functional configuration is equivalent to Magnetite hybrid. The only intentional diff from Magnetite to Tourmaline in the modem configuration is the change of Nucleus: Magnetite uses the blob version of Nucleus which came with TCS211-20070608, whereas Tourmaline uses the source version of Nucleus by Comrade XVilka. It is essentially a change from an unknown version of Nucleus to a known one, thus it should generally be considered an improvement - but as always with such changes, extensive verification and testing needs to be done in order to ensure that nothing got broken. Aside from the one intentional change of Nucleus version, FC Tourmaline is an entirely new firmware source tree, thus it is always possible that something could have got broken unintentionally, particularly in rarely-tested areas of the firmware. Therefore, extensive testing will need to be done before we can declare Tourmaline stdmodem as officially replacing Magnetite hybrid for stable modem products.