Controls, Indicators And Test Jacks Of The Idu; Tx Opr 2 Indicator (Only For 1+1 System); Rx Opr 1/2 Indicator (Only For 1+1 System); Opr Sel No. 1-Auto-No. 2 Switch (Only For 1+1 System) - NEC PASOLINK Training Course

OPERATION
Fig. 3-3 Controls, Indicators and Test Jacks of the IDU
3-24

TX OPR 2 indicator (Only for 1+1 system):

Lights when the modulator and transmitter of No. 2 channel are
selected.
RX OPR 1 indicator (Only for 1+1 system):
Lights when the demodulator and receiver of No. 1 channel are selected.
RX OPR 2 indicator (Only for 1+1 system):
Lights when the demodulator and receiver of No. 2 channel are selected.

OPR SEL No. 1-AUTO-No. 2 switch (Only for 1+1 system)

Enables channel switching depending on the setting position in
Maintenance conditions as follows:
No. 1 : Manually select No. 1 channel
AUTO : Automatic switchover control
No. 2 : Manually select No. 2 channel
Caution: Before the start of maintenance, including operation of the
OPR SEL SW on the front panel of the equipment, select
the equipment to maintenance mode using the LCT.
After all operation for maintenance have been completed,
perform MAINT OFF setting.
NMS LAN
NMS/RA LA PORT
LA PORT
MS LAN
DSC/ASC NMS/RA
LA PORT
PASOLINK
EOW
CALL
ODU IDU
PWR
RESET
MAINT
FUSE (7.5A)
−
+
SELV
PASOLINK
RESET PWR ODU
IDU
MAINT
FUSE (7.5A)
−
+
SELV
PASOLINK
EOW
CALL
RESET
OPR ALM
OPR
SEL
TX RX TX RX
No.1
1
−
2
No.2
LA PORT
PASOLINK
RESET
PWR ODU IDU
MAINT
FUSE (7.5A)
−
+
SELV
ROI-S04488
IDU for 1+0
No. 1 CH
MD UNIT
SW UNIT
IDU for 1+1
No. 2 CH
MD UNIT