A lot of Point to point vocal communication still routed through a switch or an Internet numerical address using some kind of tunneling protocol or an video app. What few friends I know remaining have actually been busy reworking rural 2 wire POTS circuits into 4 wire "naked DSL" service. They are still doing a lot of T3 or faster service for 5G cell sites.I haven't subscribed to linear cable television in over two decades. Why is ESPN2 pulling larger numbers than ESPN proper? Is it like back when MTV moved all the music videos to MTV2?
Also, it's amazing how decrepit these networks' numbers have become. I can't believe most are even still on the air.
Were you at 1010 Wilshire? I think it was Pacific Bell's primary corporate location in the L.A. area, and aside of a few central offices in Alhambra and Montebello, I used to run all around the inside of that place as a kid on weekends when a relative had an upper floor job there. The entire building is now residential.
Do you still have any contacts in that field? I'm very curious about the status of the SS7 PSTN these days. Not just last mile/local loop statistics (e.g. remaining subscriber counts). But especially the actual, internal digital TDM parts. Youtube is filled with videos of urbex people climbing abandoned long lines microwave towers. The internet is full of talk about ILECs wanting to completely scrap their 5AESS/DMS100/GTD5EAX switches. I wonder how much of the nationwide TDM network (as a web of links physically distinct from the internet) still exists, versus how much is being offloaded (invisibly to subscribers) onto IP, etc.
The TDM stuff is still being used by utility companies and anyone needing strong, safe and cheap data between sites. The DOD still has a lot because it is not easily accessible be the internet. it can be broken into but the users will know who an where almost immediately.
