LaForge's home page (Posts about isdn)

RetroNetCall: "ISDN B-Channel protocols"

Harald Welte — Tue, 06 Dec 2022 16:00:00 GMT

I've presented about ISDN B-Channel protocols (X.75, V.120, V.110, T.70, ...) as part of the RetroNetCall talk series on retro-networking technology.

You can find the video recording at https://media.ccc.de/v/retronetcall-20221207-laforge-isdn-b-channel-protocols

Many people with some kind of telecom background are familiar with D-channel (signalling) protocols of ISDN, and you can find many publications on that topic. Surprisingly, much less publications are talking about the B-channel protocols used for data transmission, like VX.75, V.110, V.120, T.70, ...

RetroNetCall: "OCTOI project status update"

Harald Welte — Tue, 08 Nov 2022 16:00:00 GMT

I've presented an OCTOI project status update (Nov 2022) as part of the RetroNetCall talk series on retro-networking technology.

You can find the video recording at https://media.ccc.de/v/retronetcall-20221109-laforge-octoi-status-update

OsmoDevCall: "Retronetworking: V5 interfaces in ISDN/PSTN"

Harald Welte — Mon, 27 Dec 2021 16:00:00 GMT

I've presented on Retronetworking: V5 interfaces in ISDN/PSTN as part of the OsmoDevCall talk series on Osmocom and related technology.

You can find the video recording at https://media.ccc.de/v/osmodevcall-20211228-laforge-retro-isdn-v5

OsmoDevCall: "E1, TDM, PDH, SDH, Basics"

Harald Welte — Thu, 11 Nov 2021 16:00:00 GMT

I've presented on E1, TDM, PDH, SDH, Basics as part of the OsmoDevCall talk series on Osmocom and related technology.

You can find the video recording at https://media.ccc.de/v/osmodevcall-20211112-laforge-tdm