NEC PASOLINK Training Course page 48

OPERATION
Table 3-2 Interface Terminals and Jacks of 1+1 System (4/9)
Terminal
ALM
(D-sub Connector, 37 Pins)
Pins 1 (COM), 2 (NO)
and 3 (NC)
Pins 4 (COM), 5 (NO)
and 6 (NC)
Pins 7 (COM), 8 (NO)
and 9 (NC)
Pins 10 (COM), 11 (NO)
and 12 (NC)
Pins 14
Pins 15
Pins 20 (COM), 21 (NO)
and 22 (NC)
3-14
Alarm and answer signal input/output
No. 1 transmitter alarm output*
Normal state :
Alarm state :
No. 2 transmitter alarm output*
Normal state :
Alarm state :
No. 1 receiver alarm output*
Normal state :
Alarm state :
No. 2 receiver alarm output*
Normal state :
Alarm state :
Buzzer signal output
Note: The terminal is used as an input terminal of buzzer
signal for the back-to-back station.
Buzzer signal input
Note: The terminal is used as an input terminal of buzzer
signal for the back-to-back station.
BER alarm output when BER worse than 10
3
(selectable)*
Normal state :
Alarm state :
Description
3
Between Between
Pins 1 and 2 Pins 1 and 3
Open Closed
Closed Open
3
Between Between
Pins 4 and 5 Pins 4 and 6
Open Closed
Closed Open
3
Between Between
Pins 7 and 8 Pins 7 and 9
Open Closed
Closed Open
3
Between Between
Pins 10 and 11 Pins 10 and 12
Open Closed
Closed Open
-6
/10
Between Between
Pins 20 and 21 Pins 20 and 22
Open Closed
Closed Open
ROI-S04488
-5 -4 -3
/10 /10