5963 computer grade dual triode production dates 3508

Davidson)

Well, considering that GTE was still running SXS in the majority of their offices in California, that would be true...for them. By the '80s, the RBOCs were already phasing out 1A-ESS to be replaced by 5ESS, which was already SS7-capable as installed. GT was saddled with other problems too, like Kellogg X carrier on local cable pairs due to underinvestment in copper by both them and their predecessors. To upgrade or risk losing service territory, GT went to the failed Automatic Electric GTD5, which was obsolete when they installed them. They were, however, a mbuttive improvement over GT's horridly maintained SXS with directors.

That was true in the SXS and XBAR days, but died with ESS. Most 4A men could tell when the switch was going to dump a card due to a bad link frame or other problem just by the sound of the relay sequence while putting a 101 call through the switch.

Plus, you were probably stuck with ALASCOM, too!

Not anymore, but in the analog days after the Wendover disaster in '61, AT&T Long LInes was VERY good at isolating and rerouting around trouble. When Bob Allen took over as CEO of AT&T, all that went to crap.

Nice try, but simply not true. The failuire of AT&T in later years was due to one reason and one reason only: incompetence at the top.

NorTel = NO tel