On Mar 7, 2012, at 9:19 PM, Chuck Guzis wrote:
On 7 Mar 2012 at 20:31, William Donzelli wrote:
What's the earliest instance of wire-wrap anyone knows of?
Chuck mentioned WECo. Certainly it was in common use in the mid-1950s
in COs.
Yup, you'll see crossbar switches full of it. Of course, not using
30AWG Kynar-insulated wire, more like 26AWG. It may still be used;
I'm not up to date on the latest switching gear.
I certainly see it on a T1/E1 plugboard at Hughes Network Systems when
I'm there (large-gauge wire, probably 26AWG, and bigger posts than what
I'm used to). It's probably used when a punchdown cross-connect is
undesirable, since those usually aren't good for much more than 1 shot.
Generally speaking, if Ma Bell adopted a technology,
it was probably
pretty durable. Modular plugs excepted.
Modular plugs are plenty durable. It's the retention clips that break
off if you look at them wrong.
- Dave