TELECOM Digest OnLine - Sorted: Re: Non-Bell ESS?

Re: Non-Bell ESS?

Joseph (
Wed, 06 Jul 2005 21:00:54 -0700

On 6 Jul 2005 10:59:05 -0700, wrote:

> The Bell System put its first test call through a laboratory
> Electronic Switching System in 1958 and had a prototype system in
> public service in the early 1960s.

> Would anyone know when other telephone companies, either in the
> U.S. or abroad, developed and implemented their own ESS? For
> instance, when did Automatic Electric put one in service?

Electronic switching systems were being installed in the late sixties
and into the seventies. Bell System used Western Electric #1ESS, GTE
used Automatic Electric #1EAX and #2EAX. North Electric
(independents) used NXUN2 IIRC. Probably Stromberg-Carlson had
something going as well (XY?) I'd guess that Northern Electric (now
Nortel) probably manufactured #1ESS as well prior to their making DMS
digital switches.

More information:

Post Followup Article Use your browser's quoting feature to quote article into reply
Go to Next message: Tony P.: "Re: Bell Usage of IBM Computers For Switching"
Go to Previous message: Alan Burkitt-Gray: "Re: Non-Bell ESS?"
May be in reply to: "Non-Bell ESS?"
Next in thread: Diamond Dave: "Re: Non-Bell ESS?"
TELECOM Digest: Home Page