Comtest Networks MTAS-192 METALLIC TEST ACCESS SYSTEM - Manual (Page 27)

CT-IG-MTAS192-2008-v1_8.doc Comtest Networks
MTAS-192
June 2006 Installation Guide 21
Chapter 4
Cabling
4.1 Backplane Connectors
The MTAS-192 shelf has the following connectors. With the exception of the ground lug
(which is located on the side of the shelf), all connectors are located on the rear panel of
the shelf.
Table 7: Backplane Connector Functions of the MTAS-192 Shelf
Connector/Function Description
RJ-21
(8 sets)
24 Line/Facility and 24 POTS/Equipment Pairs
50-pin (25 pair) RJ-21 female connector – 1/ line card slot.
Pairings correspond to eight (8) splitter/TAU line card slots
#1-8 in the shelf.
COMM 1 and COMM 2 for ISCL Bus
RJ-45 shielded female jacks for COMM 1 communications
ports on top right and COMM 2 communications ports on
top left. Used for daisy chaining the ISCL bus from the
chassis (COMM 1 is ISCL bus OUT, COMM 2 is ISCL bus
IN).
DATA 1 for TAL Bus
RJ-45 shielded female jack for DATA 1 TAL extensions
port. Used to extend the TAL bus to the next shelf in a
daisy-chained network.
RJ-45
TAPs / DATA 2 port
RJ-45 shielded female jack. Test Access Link (TAL)
consisting of two 4-wire Test Access Paths (TAPs). Each
TAP delivers simultaneous metallic test access to both the
DSLAM and Line side of a port under test.
For a Stand-alone or master shelf configuration, this port is
used for connection to the test head.
For the slave shelf configuration, this port is the TAL input
connector for a daisy chain.