Verilink DIU 2131 (880-502765-001) Product Manual - Manual (Page 9)

Verilink User Manual 1-1
Chapter
1
High-Low Application
This user manual describes the DIU 2131 High-Low module within
Verilink’s Access System 2000 (AS2000) platform. This module
operates in conjunction with a CSU—either an SCC 2020, TAC 2010
or DIDCSU 2912—to multiplex a high-speed and low-speed
application onto a single T1. The latest firmware revisions, SCC
2.06 and TAC 1.6, enable the user to configure all of the modules at
the far end node, not just the controller. Passwords are used to
control access between the near and far ends.
NOTE: This manual requires familiarity with standard
telecommunications terminology, applications, and practices.
Overview
The High-Low module multiplexes up to 24 channels from two
synchronous ports—one high-speed for aggregating multiple data
channels and one low-speed for subrate data—and transfers the
information onto a single T1 line.
There are two data ports on the DIU 2131 rear connector module,
the HLM 2532:
• Port 1 is a high-speed V.35 synchronous port, providing n × 56
(default) or n × 64 kbit/s of bandwidth.
• Port 2 is a low-speed RS-232 synchronous port using a single
DS0, providing speeds of 2.4, 4.8, 9.6, 19.2, 28.8, 38.4, 56, or
64 kbit/s.
The front modules and their rear connector modules are shown in
the figures below.