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Mid-Span Power Hub 20-Port and 10-Port User’s Guide 1-1
1
Introduction
Functions and Features
The BL-89220ENT, BL-89420ENT, BL-89520ENT, BL-89620ENT, and BL-89720ENT
20-port Mid-Span Power Hub and the BL-89210ENT and BL-89710ENT 10-port Mid-Span
Power Hub support applications in which AC power is difficult to access, such as VoIP
phones, wireless LAN access points or Internet security cameras.
The Enterasys 20-port and 10-port Mid-Span Power Hubs act as “patch panels” and add
~48 VDC to unused (non-data) wires in standard Category 5, 5e, or 6 Ethernet cable. The
power unit delivers both data and power over a single standard Ethernet cable.
Main features of the 20-port and 10-port Mid-Span Power Hubs include:
• Fully hot-swappable modules
• Remote power feeding; powered devices receive power over the Ethernet cable
• Centralized power distribution; one powered device can be connected to a single in-
line unit
• IEEE 802.3af standard powering scheme
• Acts as a normal patch panel and places ~48 VDC on unused Ethernet pins
• Total power available: 15.6W per port per IEEE specification
• Automatic power-control circuitry to detect a powered device before providing
power
• Double-fused power surge protection
Port Indicators
Each port has its own LEDs which display the following:
• Detect (green)
• Fuse blown (yellow)
• Power from chassis (green)
• Power forwarding (green)
For information on Troubleshooting, refer to Table 3-1 on page 3-1.