Editor's Note by Chris Mattingly

Wescom’s 540 Automatic Number Identifier by Charles A. (Charlie) Pleasance

Operation of the #1ESS by Chris Mattingly

The Switch List -- Stuff for Sale, Back Issues

From the September 2000 Switcher's Quarterly: The 6A Key System - Part III by Joel Eves. Part of a series detailing the KTUs found in the 6A key system.

From the October 1998 Switcher's Quarterly: Direct Inward Dialing by Bruce Crawford. The independents provided it for years. See why Bell took so long to catch up.

From the April 2003 Switcher's Quarterly: The Day I Turned Off the Main Breaker by Keith Hlavacs. Find out why anyone would want to turn off the main breaker in a CO and still expect to keep their job.