Black Box LBH240A Network Hardware User Manual


 
Black Box
®
Heavy Duty Edge Switches Installation and User Guide(07/05)
21
All the Extreme and hardened models also come along with hardware
operated Alarm terminal block for providing extra reliability to the unit. The Alarm feature
allows the LBHXXX heavy duty users to be aware and to monitor any internal power
failure. See section 44 for details.
The front side of the unit has four/five twisted-pair 10/100Mb switch ports and
one/two 100Mb fiber port. All the RJ-45 ports of the Heavy-Duty LBHXXX Edge switches
support auto-cross (MDIX) operation under auto-negotiation mode. The Heavy-Duty
LBHXXX provides switching among four 10/100 auto-negotiating copper ports and two
100Mb fiber ports which may be SC, ST, MTRJ or LC multi-mode or single-mode. The
LBHXXX’s breadth of fiber options and well as temperature options provide many
networking options and solutions in a very small footprint.
Two sets of LEDs to indicating the operating status of ports are mounted on the
top and front (for extra viewing advantage while rack-mounted). For each port, there are
Link and Activity (LK/ACT) LED’s on the top indicating that the media cables are
Fi
g
2.2c