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Chapter 2. Installation
61200420L1-1 ESU 120e User Manual
2-5
ESU120E INTERFACES
The ESU 120e is equipped with an Nx56/64 data port, a G.703 drop
interface, an option slot, management interfaces, and an E1 inter-
face in the rear panel. See Figure 2-2.
Figure 2-2. ESU 120e Interfaces
Network Interfaces
The Network Interface (NI) port provides the connection to the E1.
This port complies with the applicable ANSI and CCITT standards.
Either the 120Ω DB15 or the 75Ω BNC interface may be used for
the Network Interface. The 75/120 selection must be made with
the front panel menus. For more information see Wiring on
page B-
1.
Network Test Interface
The MON test jack provides a bridged access jack for non-intrusive
monitoring of the incoming E1.
Nx56/ 64 Serial Interface
The Nx56/64 provides a serial interface that operates from 56kbps
to 1.984Mbps. The Nx56/64 can be configured as a V.35, V.36, EIA-
530, or V.11 electrical interface through the front panel menus. This
port provides 511 pattern generation and detection, as well as
remote loopback capability.
ESU 120e
PC or Modem
Network
Control
Input
Chain
Output
NI
ESU 120e
Chain
Input
Chain
Output
NI
Option Option
Drop
Nx56/64 Nx56/64
Drop
PBX
V.35
PBX-1
10BaseT LAN
RS530, V.11
V.35
RS530, V.11