Appendix A - Specifications
150-231-181-01, Revision 01
58
September 7, 1999
HLU-231 List 8A
HLU-231 L
IST
8A C
ARD
C
ONNECTOR
shows the card-edge connector on the HLU-231 List 8A. Active pins are highlighted in black.
Figure 29.
HLU-231 List 8A Card-edge Connector
Network Management Control Bus
The HLU-231 List 8A provides a Network Management Control Bus on pin 46 of the card-edge connector. This
allows the various PairGain Management System protocols to manage the HLU through the HMU-319 HiGain
Management Unit. Whenever the HLU-231 is under management, the
MNGD
message displays periodically on the
HLU front-panel display.
Fuse Alarm
Pin 32 on the card-edge connector is a Fuse Alarm that is driven to -48 Vdc through a 1000
resistor whenever
the onboard fuse opens.
Some HLU-231 List 8A features are affected when it is under management. Consult the
management unit practice for further information.