ADTRAN TSU 120e - Manual (Page 27)

Chapter 1. Introduction
61202129L1-1 TSU 120 User Manual 1-3
TSU Option Modules
Some of the option modules available for the TSU 120 are:
Name Description
DSX-1 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.
Includes a long haul DS1 interface.
Can 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 single or dual versions.
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 data backup upon network
T1 failure.
U-BR1TE Allows ISDN lines to be extended
over a T1 line.
Router Provides 10BaseT port and integrated
IP/IPX routing.
NxIQ Provides Frame Relay monitoring
capabilities.