SYSTEM RACK
Processor’s Device Activity window. If neces- sary, press the reset button S1on the NetNim to activate the clock status.)
PCM Bank Verification
PCM Bank Verification requires two Channel Interface Modules (CIMs).
1.On both CIMs place a patch cord from the top jack of J1 to the top jack of J2 (see Figure
2.Close S1, sections
3.On both CIMs set switch sections as follows:
Switch Section
S3
S4
S5
4.Set one module for System Test "5"
5.Set the second module for System Test "6".
6.Loop Primary Tx PCM to the Primary Rx PCM by connecting a cable
7.The modules display an "A" if the PCM bank is good. Press S2 to reset the module if "A" is not displayed.
•A failure on the primary displays a "1" on one or both modules.
•A failure on the secondary displays a "2" on one or both modules.
8.Repeat this procedure by moving the module on Shelf 6 to Shelf 5. Reset both modules if "A" is not displayed.
9.Repeat this procedure by moving the module on Shelf 5 to Shelf 4. Reset both modules if "A" is not displayed.
10.Repeat this procedure by moving the module on Shelf 4 to Shelf 3. Reset both modules if "A" is not displayed.
11.Repeat this procedure by moving the module on Shelf 3 to Shelf 2. Reset both modules if "A" is not displayed.
12.After the PCM bank has proven good, force failures on both the primary and secondary as follows:
Primary
•Remove cables on Shelf 1, J5 and J6.
•A "1" on both modules indicates a Primary failure.
•Reconnect the cables.
Secondary
•Remove cables on Shelf 1, J23 and J24.
•A "2" on both modules indicates a Secondary failure.
•Reconnect the cables.
•Remove the cable from Shelf 1, J3 to J4.
13.Remove CIMs from rack and patch cords from
VTM PCM Bank Verification
This requires the use of one CIM and one VTM1.
1.Verify the VTM1 card is in Shelf
2.On the VTM1 connect a Transmission Test Set to TP1 and TP2 (common).
3.On the VTM1 set S2 to select the 1020 Hz align- ment tone. The tone should be heard in the Test Set speaker. Adjust the monitor volume as necessary.
4.Set the CIM for System Test "1".
(S5, section 1 open; sections 2,3,4 closed.)
5.Place the module in any slot on Shelf 1.