363-206-305 Detailed Level Procedures:
Issue 3, June 2000 Page 1 of 8
DDM-2000 F
IBER
R
EACH
N
ARROWBAND
S
HELF
DLP-507
Test NBS Drops 1-24 (Shelf 1) and 1-24 (Shelf 2)
Summary:
This procedure uses
SPQ
400 QUAD POTS or equivalent channel units to test the
channel facility from the local digital switch (LDS) to the drop TB1 or comparable
access block. The loop-start function is used for this test. At the local digital switch
(LDS), verify that the channel service and telephone number assignments have been
made for the drops (1-24 [Shelf 1] and 1-24 [Shelf 2]) being tested. At the NBS, locate
the channel unit slots on the narrowband shelves and connections on TB1 or
comparable access block. Connect a test telephone with the ringer set for bridged
ringing to the drop terminal connections. Make dialing, ringing, talking, and ring-trip
tests on each of the four drops.
1. At the LDS, verify that the logical line number (LLN) is assigned to the proper
type of service and that there is an assigned telephone number for the circuit
under test.
2. At the HDT, verify that the T0 cross-connects are provisioned.
3. At the NBS, remove the outer enclosure and open the electronics
compartment door using a 216-C tool or screwdriver.
4. Connect your electrostatic discharge wrist strap to the ESD ground jack
located at the lower left front of the NBS enclosure.
5. Locate slot 1 on shelf 1 of the NBS (Figure 1).
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