NEC NEAX 2000 IPS System Manual page 446

(2) When providing two clock supply routes
STEP1: On the DTI/CCT cards extracting clock signals, set the switches as follows to change the clock
supply route from 0 to 1.
• 30DTI0/30CCT0 card: SW-1 to OFF, SW-2 to OFF
• 30DTI1/30CCT1 card: SW-1 to OFF, SW-2 to ON
• 24DTI0/24CCT0 card: SW0-1 to OFF, SW0-2 to OFF
• 24DTI1/24CCT1 card: SW0-1 to OFF, SW0-2 to ON
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/CCT cards, set the switches as follows to stop the external clock signal input.
• 30DTI0/1 or 30CCT0/1 card: SW-1 and SW-2 to OFF
• 24DTI0/1 or 24CCT0/1 card: SW0-1 and SW0-2 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 or CCT0/1 cards, set the switches as shown in STEP 1 to input clock signals from
the clock supply route 1.
STEP7: Repeat the procedure shown in STEP 2 and STEP 3.
STEP8: On the DTI/CCT cards, set the switches as follows to change the clock supply route from 1 to 0.
• 30DTI0/30CCT0 card: SW-1 to ON, SW-2 to OFF
• 30DTI1/30CCT1 card: SW-1 to OFF, SW-2 to ON
• 24DTI0/24CCT0 card: SW0-1 to ON SW0-2 to OFF
• 24DTI1/24CCT1 card: SW0-1 to OFF, SW0-2 to ON
– The CLK lamp on the MP card lights.
CHAPTER 5 OPERATION TEST
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PLO OPERATION TEST
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