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AOptical Bypass Relay Connector
The optical bypass relay is controlled through a cable that connects
to the OBR jack, P1, on the MPMC222 front panel.
the pins on the OBR jack.
the OBR cable.
P1
4
1
5
2
6
3
Pin
1, 2
3
4
5
6
PHY A
Figure A-1. MPMC222 Front Panel Detail
Table A-1. OBR Connector Pin Assignments (P1)
Signal
Description
VCC
+5V power (fused)
PRIEN*
PRIMARY ENABLE
When low, enables primary ring insertion.
SECEN*
SECONDARY ENABLE
When low, enables secondary ring insertion.
GND
GROUND
Logic ground, +5V Return.
RELAY*
When low indicates that optical bypass relay is
installed.
Table A-1
shows the pin assignments for
PHY B
A
Figure A-1
shows
LEDs
11724 9701
A-1
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