5963 computer grade dual triode production dates 3501
Davidson)
More. The 416C, the last version, went for a nice $460 apiece. The 416s were the backbone of the AT&T Long Lines TD radio network (4 GHz) for 40 years.
Sure, but "in major toll centers" is *very* limiting, because the advantages of SS7 were only realized when...
We used to send out 3KW klystrons in for rebuilding, if they weren't too far pitted. That'd save a cool $4K a unit.
Davidson) SS7 was already in deployment in major toll centers by '90. I was involved in that...
ACK! SF UNITS! BOOO....HISS!
You pay a penny a minute (cell phoners generally pay zero per minute) and local POTS goes up and up to compensate. Now that the Bell System is about 75% back together, things will change.
How it relates to "length of life," I have not a clue.
Somehow, I'd lay that increase at better medical care I get from my non-profit HMO than communications availability. As for POTS and LD service, it's no better than it was circa 1990, and probably a little worse. Reorders in peak periods are common now; they were a mortal sin back in the '70s. Transmission impairments due to over squeezing bitstuffing schemes yields degraded transmission qauality as well on DDD access, but with so many people on those rotten cell phones, it's hard to pin down where the problem lies.
dB
5963 computer grade dual triode production dates 3502
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