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The ADTRAN Total Access Ear and Mouth /Transmit Only Dataport (E&M/TO) is an access module that plugs into a single channel slot of a Total Access 1500 platform. It provides an interface between a platform PCM interface and a Voice Frequency (Voice Frequency) transmission facility with E&M DC signaling supervision. The unit is multifunctional and can be provisioned to operate in two-wire E&M, four-wire E&M, two-wire TO, and four-wire TO. The primary applications for the E&M/TO channel unit are for providing PBX foreign exchange at the customer premises, or tandem central office applications. The channel unit is intended only for interface with intro-building wiring, and it is not equipped with outside plane metallic interface lightning and power cross protection. The E&M/TO card can also be deployed in a Total Access 750 or Total Access 850.
The E&M/TO features a four-wire 600W or two-wire 600W + 2.15 mf VF interface with DC isolation. Provisioning is accomplished through on board switches and craft interfaces, and a network digital loop back can be performed via site manager or craft interface. A dial pulse distortion correction option is available. It is compatible with Types I, II, III, or V E&M signaling. The E&M/TO is CLASS compatible, and also meets UL, NEBS, and PUB43801 requirements. ADTRAN's new family of Carrier Class multi-service access platforms, Total Access 750/850/1500, offer unmatched versatility for narrowband ser-vice offerings in the smallest form factors available. These platforms integrate the functionality of many different carrier products into a single chassis. They feature high density, easy provisioning, flexible deployment, and low cost-per-port. Deployed in either the central office or remote terminal, the Total Access 750/850/1500 provide a fast, simple, and effective means of increasing POTS capacity, deploying special services, and deploying DSL services.