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Mychaela Falconia mychaela.falconia at gmail.comHolger Freyther <holger at freyther.de> wrote: > Yes UC-20, with 40ms (according to the documentation not 20ms!) of audio > at a time. I have used gstreamer with the filebin to send audio and cat+ > audacity to receive it. What exactly are the bits which you send and receive every 40 ms? Do you get two 260-bit GSM 06.10 codec frames every 40 ms, with the ability to send your own arbitrary bits into the TCH uplink, including the possibility of passing non-speech data over voice TCH if the network does TFO as in GSM 02.53? The latter is what the Calypso DSP allows. M~