For the past few months, I’ve been regularly lecturing on the architecture of the IP Multimedia Subsystem, and VoLTE access. Therefore, I thought it fitting to take a step back and explore some classic telephony.

Western Electric produced the WE 500 in 1949, a design that was Bell’s standard issue deskphone from 1950 to 1984 (when the Bell divestiture into ‘Baby Bells took place’).

The following is a decomposed view of the a Kellogg 500 (K-500) from 1958, which was produced by Kellogg / International Telephone and Telegraph (ITT) under licensed permission from Western Electric. The K-500 is identical to the […]