Alcatel OmniSwitch 7700 Hardware User's Manual page 69

Installing and Managing Power over Ethernet (PoE)
3
The power shelf includes four power supply bays of its own. These power supplies provide inline
power through the switch's backplane to the Ethernet ports located on OS7-ENI-P24 modules. The power
supplies in the OS7-IP-SHELF are plugged into an AC power source in the Building One data center.
Note. PoE is supported only on Ethernet ports in OS7-ENI-P24 modules.
4 Standard Category 5 Ethernet cables are connected to the RJ-45 ports on the switch's OS7-ENI-P24
module. Like many typical campus network layouts, the Ethernet cable runs from the data center to a
separate building nearby. (The maximum cable distance is approximately 100 meters.)
5 The Ethernet cables are then plugged into PDs (i.e., IP telephones and wireless LAN devices), which
are used by operators and staff in the adjacent Building Two. Both electrical power and data flow are
provided via these standard Category 5 Ethernet cables. No additional AC power source (such as a 110V
wall socket) is required for any of these attached PDs.
Note. Because OS7-ENI-P24 modules fully support 10/100 Ethernet connectivity, you may also attach
non-PD equipment—such as computer workstations, printers, servers, etc.—to the OS7-ENI-P24 ports.
See Chapter 5, "Network Interface (NI) Modules,"
OmniSwitch 7700/7800 Hardware Users Guide
for more information on the OS7-ENI-P24.
April 2005
Power over Ethernet Overview
page 3-5