The Octal E&M Module is a member of the ATLAS 550 family of products. It provides eight analog voice-grade interfaces, either 2-wire or 4-wire, for use as tie-trunks using E&M signaling or as dedicated transmission only (TO) interfaces for additional data services. This manual provides an introduction to the device features, installation, and operation.
ATLAS 550 Octal E&M Module User Manual
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