Artifact Details Title Analog and Digital Control Equipment Catalog Number 102687023 Type Document Description Includes documents: DIGI-TEL Analog to Digital Converter DIGI-TALK Digital-to-Voice Converter-Multiplexer North Electric Digital Clock Date 1970 ca. Publisher North Electric Company Category Promotional Material Collection Title Buckholtz, Desaussure and Michael collection Credit Gift of Thomas J. Buckholtz and Helen T. Buckholtz Lot Number X2592.2004