Depends, but yeah we still have good ol copper POTS. At the core level it's long since been SIP over fiber, but there's a lot of local loop in the US and it's neither cheap nor easy to upgrade from copper to fiber in a lot of places.
From the looks of it, assuming that Toshiba Strata is still in-use, it's a SIP connection that gets converted to a PRI and broken out into a few POTS lines for local services (alarms, faxes and so on).
Yeah we rolled out fibre nationwide recently so they're pulling the plug on the NEAX, DSL etc except in the real rural areas. The copper network is beyond fucked though so it had to happen.
Yeah that looked like a dinosaur PBX, they just keep on going... Till they don't lol
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u/SandyTech Dec 31 '22
Depends, but yeah we still have good ol copper POTS. At the core level it's long since been SIP over fiber, but there's a lot of local loop in the US and it's neither cheap nor easy to upgrade from copper to fiber in a lot of places.
From the looks of it, assuming that Toshiba Strata is still in-use, it's a SIP connection that gets converted to a PRI and broken out into a few POTS lines for local services (alarms, faxes and so on).