Poe (Power Over Ethernet) Support - Enterasys G3G124-24 Hardware Installation Manual

• Standalone or Rack Mountable Chassis
The G‐Series Ethernet switch can be installed as a freestanding unit on a shelf or table.
Optionally, it can be mounted into a standard 48.26‐centimeter (19‐inch) equipment rack.
• Optional PoE
– PoE is installed on the G3G124‐24P base system.
– G3G‐POE, a 24‐port PoE module is available for any installed G3G‐24TX IOM or the
G3G124‐24 base system.
Refer to "PoE (Power over Ethernet) Support" on page 1‐3 for more information.
• Power Supplies
The G‐Series switch requires 100~240 V AC input and has two power supply slots located in
the rear of the base unit. For power supply specifications, refer to "Power Supply Planning"
on page 2‐6. Power supplies must be ordered separately since they are not provided with the
base switch.
The following power supplies are available to be purchased from Enterasys.
– G3‐PWR, a 400‐watt AC power supply capable of providing power to a fully‐loaded non‐
PoE switch and some PoE power
– G3‐PWR‐POE, a 1200‐watt AC power supply recommended for full PoE capability
The power supplies are removable. They can be mixed and can be used redundantly with full
load sharing, or non‐redundantly. The switch is capable of supporting 48 ports at 15.4 watts
fully redundant, and 96 ports at 15.4 watts in non‐redundant mode. For more information,
refer to "Power Supply Planning" on page 2‐6.
• Power LEDs
The two power LEDs indicate voltage for the primary and secondary power inputs.
• Fans
The G‐Series switch has nine fans in two different sizes located in three zones to serve
different cooling functions. It supports fan redundancy, which means that the system will
remain operational if one fan fails.
Refer to "Fan Management" on page 1‐4 for more information.
• System LED
The SYSTEM LED indicates operational status of the system, as described in Table
page 3‐2.
• IOM power status LEDs
IOM status LEDs indicate the operational status of optional module(s), including when they
are powered down and can be safely removed, as described in "Removing an IOM" on
page 2‐11.

PoE (Power over Ethernet) Support

The G3G124‐24P switch (and the G3G124‐24 switch and G3G‐24TX IOM equipped with a user‐
installed optional PoE card) are 802.3af compliant. This means they can provide Power over
Ethernet cable connections from their RJ45 front panel connectors to powered devices (PDs) in the
network. Power over Ethernet (PoE) refers to the ability to provide 48 Vdc power to a powered
device using the same Ethernet cabling that provides data. Modern Ethernet implementations
employ differential signals over twisted pair cables. This requires a minimum of two twisted pairs
for a single physical link. Both ends of the cable are isolated with transformers blocking any DC or
Enterasys G-Series Hardware Installation Guide 1-3
Features
3‐1 on