ADTRAN Cable T1 ESF CSU ACE, Руководство пользователя

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Chapter 1. Introduction
1-2 T1 ESF CSU ACE User Manual 61203025L1-1
offering. Since the introduction of ESF, equipment installed in
private networks can also provide this performance information to
the user.
T1 ESF CSU ACE OVERVIEW
Most carriers (regional or local telcos), when supplying a T1 line to
customer premises equipment (CPE), require an interface to
monitor the T1 line. The T1 ESF CSU ACE (extended superframe
channel service unit advanced communication equipment)
provides the required interface between the CPE (such as DSUs,
channel banks, T1 multiplexers, and PBXs) and telco or private T1
facilities. See Figure 1-1.
Figure 1-1. T1 ESF CSU ACE Application