Verilink SCC 2020 (880-503268-001) Product Manual - Manual (Page 11)

Overview
Verilink SCC 2020 User Manual 1-3
Compatible
Modules
Types of application modules which may be managed by the SCC
2020 are illustrated below:
Table 1-1 SCC Compatible Modules
Components The complete SCC 2020 assembly consists of a front-panel module
and a rear panel connector interface module, together occupying a
single shelf-slot position accessible from the front and back of the
AS 2000 rack or shelf. The CIM is installed from the rear of the shelf
into the backplane. The SCC 2020 front module is installed from
the front. The CIM is always installed first and removed last. The
SCC front module is installed last and removed first; it is equipped
with ejector handles.
The SCC module front panel provides indicator LEDs and
management ports. It also provides a Craft interface port and
signal access jacks.
NOTE: The bantam type signal access jacks provide access to
internal signals within the module. If the SCC 2020 is being
used with any type of DIU (DSU) module, the signals on the
bantam jacks will NOT reflect line signals and this jack field
should not be used.
Module Type Usage
TAC 2010 CSU T1 CSU which may be used as a CSU only (CSU mode), part of a CSU/DSU
(Mux mode) or in a combination of both (Drop & Insert Mode). May be
used with up to 24 DIU 21xx DSU modules to make a data channel bank.
DIU 2130 DSU DSU with two synchronous serial interface ports for connection of Data
Terminal Equipment (DTE). May be used with TAC 2010 (including the TAC
2010 portion of an NCC 2020). Uses a shelf midplane to receive/transmit
data to a CSU module.
DIU 2130/DBU DSU DSU with a single synchronous serial interface port and modified firmware
which uses the second port to switch the DTE data from port 1 to an
external Dial Back-Up device—which must be configured to dial on DTR.
Uses a shelf midplane to receive/transmit data to a CSU module
DIU 2130
56K/NMS
DSU DSU with two synchronous serial interface ports and support for routing
of individual timeslots, in the “telco cloud”, to remote sites with 56K DDS
circuits. Uses a shelf midplane to receive/transmit data to a CSU module
DIU 2140 Sub-Rate
Data
Multiplexer,
5 port DSU
DSU with five RS-232 interface ports, each individually selectable for sync
or async data, which are multiplexed into a single timeslot (DS0) of the
associated T1 CSU. Uses a shelf midplane to receive/transmit data to a
CSU module
TAC 2130 Integrated
DSU/CSU
Standalone (for data purposes) DSU/CSU, supports a single synchronous
serial interface only. Does not and will not use any midplane bus to
transfer data to any other module.