Farewell to the 1A ESS [telecom]

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Newsgroups: comp.dcom.telecom
Subject: RIP 1AESS
Organization: NRK Clinic for habitual NetNews Abusers - Beltway Annex


In the early hours of June 3, 2017 an era ended at AT&T with the
retirement of the last 1AESS switch in service.  The 1AESS switch at
the Lincoln Central Office in Odessa, TX was converted to a new G6/G5
switch.  The Lincoln switch was put in service February 25, 1979.  It
saw over thirty-eight years of call processing service. The final
conversion was a flawless success the switch had service turned down
on Friday, June 3, 2017.

"This is truly the end of an era for AT&T.  Decades ago the 1AESS
switch was a workhorse for our network services and for more than 50
years took our services to a new level.  Many of our team members have
spent their career maintaining it," said Bill Huber, SVP Technical
Field Services.

Western Electric's #1ESS switching system was designed for areas where
large numbers of lines and lines with heavy traffic are served. It
generally serves between 10,000 and 65,000 lines. The final 1AESS
replacement program began January 30, 2010.  During that time 56 1AESS
were retired and 707,328 wired lines were migrated.  Thanks to the
noteworthy combined efforts of many organizations within AT&T and
partner contractors, this project was a true testament to exceptional
leadership and extraordinary focus.  Thank you to all who were a part
of this great accomplishment.

 - - - - -

Comments: An amateur radio friend had been detailed from Ohio Bell
Telephone (OBT) Transmission Engineering to NJ in the 1960's to inject
hands-on telco experience into the design team; from his stories it
was badly needed.

I thought all the 1A's were long gone domestically, as they didn't
support Equal Access well. I recall that Telcom Digest greybeard Al
Varney mentioned that post-retirement he'd gotten a part-time job on
1A support; I believe for Latin America.

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