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NDA-24300 CHAPTER 6
Page 469
Issue 1
SYSTEM OPERATIONS
STEP 1 Make sure the active Speech Path System.
(1) Check all the lamp indications in Figure 6-49, which are in the same switching block.
Figure 6-49 TSW/DLKC/MUX in ACT Mode
Note:
Because this 4-IMG uses multiple TSW and MUX cards, be sure to check all the circuit cards concerned,
which are in the same Switching Block. For example, if your system adopts the fully expanded system,
you must check a total of 4 TSW cards and a total of 16 MUX cards in this step.
(2) Make sure the STBY mode of mate Speech Path System. Check all the lamp indications in
Figure 6-50, which are in the same Switching Block.
Figure 6-50 TSW/DLKC/MUX in STBY Mode
MUX: Active
MUX (PH-PC36)
green
TSW: Active
TSW (PH-SW12)
green
DLKC: Active
DLKC (PH-PC20)
green
Legend
Lamp is ON
:
Lamp is ON
:
FRONT VIEW
MUX ACT
MBMB
TSW MBR
TSW ACT
OPE/MB
MB
The ACT/STBY of Speech Path System can be changed over only when the mate system is
in STBY mode. Do not attempt the changeover if the mate Speech Path System is closed.
WARNING
MUX: ST-BY
MUX (PH-PC36)
TSW: ST-BY
TSW (PH-SW12)
DLKC: ST-BY
DLKC (PH-PC20)
Legend
Lamp is OFF
:
Lamp is OFF
:
FRONT VIEW
MUX ACT
MB
MB
TSW MBR
TSW ACT
OPE/MB
MB