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NEAX2000 IVS
2
ISDN System Manual
Page 198 ND-70919 (E), Issue 1.0
CHAPTER 5 OPERATION TEST
PLO Operation Test
STEP 6: On the DTI0/1, PRT0/1, BRT0/1 cards, set the switches as shown in STEP 1 to input
clock signals from the clock supply Route 1.
STEP 7: Repeat STEP 2 and STEP 3 of this procedure.
STEP 8: On the DTI/PRT/BRT cards, set the switches as follows to change the clock supply
route from 1 to 0:
• 30DTI0 card: SW-1 to ON, SW-2 to OFF
• 30DTI1 card: SW-1 to OFF, SW-2 to ON
• PRT0/24DTI0 card: SW0-1 to ON SW0-2 to OFF
• PRT1/24DTI1 card: SW0-1 to OFF, SW0-2 to ON
• BRT0 card: SW0-2 to ON, SW0-3 to ON
• BRT1 card: SW0-2 to ON, SW0-3 to OFF
• 2BRT0 card: SW11-2 to ON, SW0-3 to ON
• 2BRT1 card: SW11-2 to ON, SW0-3 to OFF
– The CLK lamp on the MP card lights.
STEP 9: Repeat STEP 2 and STEP 3 of this procedure.
NOTE: If noise periodically occurs, replace the MP card after checking the switch settings on
the MP card, and do the above test again.
Interoffice Synchronization Test
This test checks to see if noise occurs while calling with the opposite office, by difference of the
clock signal frequency between the offices. Do the following procedure using “In Service” trans-
mission lines.
STEP 1: Originate an outgoing call via trunks.
STEP 2: Check the speech quality (if noise, distortion or click occurs during a few minutes) with
the opposite office mutually.
STEP 3: On the DTMF telephone set, keep pressing any dial button, and check to see if noise
periodically occurs on the DTMF signals coming from the calling station in the opposite
office.