Chapter 1. Introduction
6
TSU 120 User Manual
61200.129L1-1
Interfaces
The TSU 120 base unit is equipped with a slot in the
rear panel to house option modules which provide a
variety of additional data ports. See Figure 1-3.
The base unit is equipped with the following five
interfaces:
• Network DSI interface per AT&T 61402
• DSX-1 (PBX)
• Nx56/64 serial V.35 high-speed interface
• Control input (RS-232)/Chain port input
• Chain port output
The option modules which are designed to slide into
the rear panel option slot can have up to four inter-
faces. The following modules are currently available:
• DSX-1 (PBX)
• Nx56/64 - single or dual
• Voice (FXS/FXO/4E&M/4T0) - 2 channels/4
channels
• Office Channel Unit Data Port (OCU DP) - single or
dual
• Full drop and insert
• Dial backup
TSU 120
PC or Modem
Network
Nx56/64
Up to 4
Control
Input
Chain
Output
NI
TSU 120
Nx56/64
Chain
Input
Chain
Output
NI
Option
Option
Up to 4
DSX-1
DSX-1
To PBX
To PBX
Figure 1-3
TSU 120 Interfaces
Summary of Contents for TSU 120
Page 1: ...TSU 120 PART NUMBER 1200129L1 USER MANUAL 61200 129L1 1A July 1997...
Page 52: ...Chapter 2 Installation 38 TSU 120 User Manual 61200 129L1 1...
Page 132: ...Appendix C System Configuration Charts 118 TSU 120 User Manual 61200 129L1 1...
Page 138: ...Appendix D TSU 120 System Messages 124 TSU 120 User Manual 61200 129L1 1...