Electronic Switching

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[1] Wikipedia Page on ESS switching...

[2] What model and "version" is the Panasonic 308?

[3] MITEL SX-5

[4] SG-1 Introduction

[5] 50 Year Birthday of the Number One Electronic Switching System

[6] Anyone Remeber the ESS Switches of the 70s/80s/90s?

[7] I have a question for those of you older then me

[8] Switched Access Remote Test System (SARTS) Bellcore Common Language sheet

[9] MCFI=Distinctive Ringing Feature and Forwarded Calls

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