- Nortel Network Multiservice Platform User's Guide

Operation, administration, and maintenance (OAM) features 2-165
Planning and Ordering Guide—Part 1 of 2 NTRN10AN Rel 12.1 Standard Iss 1 Apr 2004
Split test access
The split test access is an intrusive, service-affecting operation. The original
cross connection is split, with the incoming signal being connected (via TAP)
to the test unit receiver and the outgoing signal is fed from the transmitter of
test unit. See Figure 2-57.
Figure 2-57
Test access-split state
EX1398
The split test access configurations that are supported include:
• Single Facility Access Digroup, Split Equipment side (Single FAD,
SPLTE) see Figure 2-58
• Single Facility Access Digroup, Split Facility side (Single FAD, SPLTF)
see Figure 2-59
• Single Facility Access Digroup, Split Equipment input and continue from
TAP (Single FAD, SPLTA) see Figure 2-60
• Dual Facility Access Digroup, Split Equipment and Facility sides (Dual
FAD, SPLTEF) see Figure 2-61
Note: In Figure 2-58 to Figure 2-61 “equipment side” and “facility side”
shows the direction(s) of the connection under test.
Single FAD, SPLTE and Single FAD SPLTF
In a single FAD environment, only one direction of the signal can be tested at
a time.
In the case of Single FAD, SPLTE, both the A and B paths are interrupted with
the input of A path-equipment side going to the TAP input and the output to B
path-equipment side as shown in Figure 2-58.
Input Output
Test
Unit
TAP IN
TAP Out