ADTRAN 1202076L1#DC, 1202076L2#DC user manual TSU Option Modules, Module Name Description

		Chapter 1. Introduction
TSU Option Modules
	Module Name	Description
	DSX1	Short haul T1 interface for operation with a
		PBX (Terminal Interface).
	Full Drop and Insert	Permits the dropping of data and insertion of
		new data into the same DS0 time slot. This
		module includes a long haul DS1 interface. It
		can also be used as a second DS1 interface to
		provide up to 3 MB aggregate throughput.
	Nx56/64 Serial Interface	Provides a V.35 serial interface in either sin-
		gle or dual versions.
	NxIQ	Frame-relay aware device that provides
		detailed information regarding the health
		and performance of the frame relay circuit.
	Voice Interface	2/4 channel FXS/FX0/E&M.
	OCU DP	Interfaces to DDS or 4-wire Switched-56.
	DSU DP	Provides two sync or async ports (232 or
		V.35).
	Dial Backup	Allows for backup of data upon network T1
		failure.
	U-BR1TE	Allows ISDN lines to be extended over a T1
		line.

61202076L1-1 TSU 600 User Manual 1-3