This group is a forum for discussion of all electro-mechanical central office switches and related equipment. Strowger step-by-step, crossbar, you name it. If the telco used it, it's here. It is intended to be a forum for discussion of all types of telephone switching. Please feel free to use the group for buying, selling, or trading of equipment, or any telephone switching system related discussion. Please try and keep conversation oriented towards North American switching systems, although you may digress from time to time.