Line Testing From A Test Desk - Nortel DMS-100 Series Maintenance Manual

7-26 Star Remote System manual maintenance
Figure 7-1 UMP connections for subscriber line test access
RCP
DS30 link
UMP
Star Hub

Line testing from a test desk

The Star Hub supports external line testing using a Centralized Automated
Loop Reporting System (CALRS) test desk or Teradyne 4TEL line test
equipment. The CALRS or 4TEL central equipment controls the testing by
means of a tip, ring and sleeve interface to the NTT card NT2X90 in an MTM.
The Peripheral Test Unit of CALRS or 4TEL at the remote site has two kinds
of connections:
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297-8353-550 Standard 05.01 March 2001
Codec
Metallic test
access
Test
(MTA)
head
Processor
Montalk/talk
interface
DMSX
interface
messaging through a modem
a testing connection
Line cards
Metallic
bus
Distribution
points
Scan points
External
tester