Create H.221 decoder
In order to play/understand/hack ISDN video telephony, we will need a H.221 decoder as the very first stage.
In its basic incarnation it would need to split the 64k channel into its 8 timeslots, and perform frame + multiframe alignment, verify CRC4 and output the FAS and BAS. This should help us get a better feeling of the H.320 universe and also allow us to see what exact codecs/rates the T-View_100 are using in 1B/2B mode, how the handshake at call setup time works, etc.
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