. San Francisco and Bay counties telephone directory . Key equipment another conveniehce By means of this simple ecjuipment (in several sizes) all in-coming telephone calls may be answered at a central point orany one of several locations. It can be adapted to any businesstelephone layout, large or small. 7Telephone switchboard forsmall businesses This small member of the switchboard familycentralizes and distributes all your telephonecalls. It also provides intercommunicating is easy to 8

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