NEC PASOLINK - Page 48

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