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(2)
When providing two clock supply routes
STEP1: On the DTI/PRT/BRT cards extracting clock signals, set the switches as follows to change the
clock supply route from 0 to 1.
• 30DTI0/30PRT0 card: SW-1 to OFF, SW-2 to OFF
• 30DTI1/30PRT1 card: SW-1 to OFF, SW-2 to ON
• 24DTI0/24PRT0 card: SW0-1 to OFF, SW0-2 to OFF
• 24DTI1/24PRT1 card: SW0-1 to OFF, SW0-2 to ON
• BRT0 card: SW0-2 to OFF, SW0-3 to OFF
• BRT1 card: SW0-2 to ON, SW0-3 to OFF
• 2BRT0 card: SW11-2 to OFF, SW11-3 to OFF
• 2BRT1 card: SW11-2 to ON, SW11-3 to OFF
• 4BRT0 card: SW4-1, SW4-2, SW4-3, SW4-4 and SW4-5 to OFF
• 4BRT1 card: SW4-1 to ON, SW4-2 to OFF, SW4-3 to OFF, SW4-4 to OFF and SW4-5 to
OFF
STEP2: Originate an outgoing call via trunks.
STEP3: After an outgoing connection via trunks has been established, confirm interoffice synchroniza-
tion and speech quality as follows:
• On the DTMF telephone set, keep pressing any dial button.
• Check to see if noise periodically occurs on the DTMF signals coming from the calling sta-
tion in the opposite office.
• Do the above test again in the opposite direction.
STEP4: On the DTI/PRT/BRT cards, set the switches as follows to stop the external clock signal input.
• 30DTI0/1, 30PRT0/1 card: SW-1 and SW-2 to OFF
• 24DTI0/1, 24PRT0/1 card: SW0-1 and SW0-2 to OFF
• BRT0/1 card: SW0-2 and SW0-3 to OFF
• 2BRT0/1 card: SW11-2 and SW11-3 to OFF
• 4BRT0/1 card: SW4-1, SW4-2, SW4-3 and SW4-4 to OFF
– The CLK lamp on the MP card goes out.
STEP5: Repeat the procedure shown in STEP 2 and STEP 3.
STEP6: On the DTI0/1, PRT0/1, BRT0/1 cards, set the switches as shown in STEP 1 to input clock sig-
nals from the clock supply route 1.
STEP7: Repeat the procedure shown in STEP 2 and STEP 3.
CHAPTER 5 OPERATION TEST
– 326 –
PLO OPERATION TEST
NWA-008852-001 Rev.5.0
98ch5001.fm
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