FreeCalypso > hg > freecalypso-tools
changeset 912:3ed4f53c6092
doc/Host-tools-overview: update fc-tch2fr bogon description
| author | Mychaela Falconia <falcon@freecalypso.org> |
|---|---|
| date | Thu, 29 Dec 2022 21:24:53 +0000 |
| parents | 7077d02ed3b1 |
| children | 1b8929cb7371 |
| files | doc/Host-tools-overview |
| diffstat | 1 files changed, 7 insertions(+), 3 deletions(-) [+] |
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--- a/doc/Host-tools-overview Thu Dec 29 21:15:36 2022 +0000 +++ b/doc/Host-tools-overview Thu Dec 29 21:24:53 2022 +0000 @@ -249,9 +249,13 @@ inside Calypso devices. fc-tch2fr This hack-utility takes a TCH downlink recording produced with - the tch record command in fc-shell and converts it to a playable - libgsm file which will most likely contain some garbage by - disregarding the non-understood DSP status words; see the + the tch record command in fc-shell (specifically, the old format + that will only be produced if the source of TCH DL bits is a + very old FC firmware version) and tries to convert it to a + playable libgsm file (containing garbage frames in reality, + resulting in very unpleasant noises on subsequent decoding) by + completely disregarding the DSP status words which were not + understood back when this hack was written in 2016. See our TCH-bit-access article for more information. fc-tmsh TI-based GSM firmwares provide a rich set of Test Mode commands