Finding related hardware interfaces with actively maintained drivers is getting hard, particularly if you want to make sure you can support it for another decade or more. Thinking of "software defined TDM", with minimal hardware interface without (soon) EoL chips
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Freaks me out most: SDH frame format, tributaries, pointers and all that Jazz. I have to prepare a couple of learning chapters on that.
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you are traching this in 2020?
#retronetworking - Još 1 odgovor
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funny how I remember G.703 from when I was an apprentice coming up for 30 years ago. Having said that, my employer then still had lots of FDM multiplex infra, plus a remote site alarm system that auto-dialled ops and played pre-recorded magnetic tracks from a spinning drum.
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I'm (sadly) not into that techniques from a developer's view, but, from an engineer's view, I experience frequently, how rock solid ISDNesque technologies are. I however did not succeed finding a community of people able of and interested in doing such stuff on a PBX level
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so far. It is amazing that a Up0 phone can easily be driven at the other end of ~1000m copper line and "boots" in a fraction of a second.
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Uff
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PDH so rules ... rock-solid technology.
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An idea could be to make a board like "ham it up" to interface with any SDR board. These boards high sampling rate allows to decode & encode E1 like signal.
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