ADTRAN 1200410L2, Руководство пользователя

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61200410L2-1A ESU LT User Manual 17
Chapter 1
Introduction
ESU LT OVERVIEW
This section provides a functional description of the ESU LT,
describes its features, and illustrates its four interfaces.
Functional Description
The ADTRAN ESU LT (Figure 1-1) is one of several E1
CSU/DSUs that offer complete flexibility for connection of various
data sources to E1 or FE1 facilities. This family of ESU products
includes the following:
•
ESU LT
- E1 CSU/DSUs with a single Nx56K/64K serial port.
• ESU 120e - Same as the ESU LT with the added feature of a
G.703 drop port and a slot in the rear panel to house an option
module. Each module offers up to four additional data ports.
Figure 1-1. ESU LT Unit
The ESU LT serves as the link between user data sources such as
local area network (LAN) bridges and routers, computers, CAD
systems, and teleconferencing equipment. The amount of
PWR
TEST
ALM ERR
TD
CS RS
RD
CANCEL
ENTER
ESU LT