Nortel DMS-100 Series Maintenance Manual page 32

1-16 Maintenance overview
NT6X21AC THL Limits
Frequency
Minimum
Maximum
NT6X21AD THL Limits
Frequency
Minimum
Maximum
System software requires the two limits to determine which D/A gain is
selected on the line card. System software requires the two to compare THL
test results against both possible limits.
Refer to the figure "LCA block diagram" for a functional view of the OPAC
LCA shelves. This description includes the components of the following
figure.
297-8211-550 Standard 05.01 August 1999
304 704
–6.2 –6.2
+1.3 +0.8
304 704
–2.7 –2.7
+4.8 +4.3
Data line card (DLC) DMS-100/200 (NT6X71AC) provides data
transmission interfaces for operation with computer terminals.
Datapath bit error rate tester line card (NT6X99AA). This line card
provides bit error rate performance (BERP) testing transmission paths to
access bit error performance of OPAC hardware components.
1505 3204
–6.2 –7.2
+0.8 +0.7
1505 3204
–2.7 –3.7
+4.3 +4.2