Allied Telesis AT-x510-52GTX User Manual

Page of 90
x510 Series Installation Guide for Stand-alone Switches
27
The cable requirements for ports operating at 1000Mbps are given in 
Table 4.
Power Budget
The AT-x510-28GPX and AT-x510-52GPX Switches have a power budget 
of 370 watts. This is the maximum amount of power the switches can 
provide at one time to the powered devices.
The AT-x510-28GPX and AT-x510-52GPX Switches have two power 
supplies. Each power supply is responsible for providing 185 watts, or half, 
of the power budget. Both power supplies must be connected to AC power 
sources for the switch to provide the full 370 watts. The power budget is 
reduced to 185 watts if only one power supply is connected to a power 
source.
The power requirements of the PoE devices determine the maximum 
number of devices the switch can support at one time. So long as the total 
power requirements of the powered devices is less than the power budget 
of the switch, the switch can supply power to all the devices. But if the total 
power requirements exceed the power budget, the switch denies power to 
one or more ports using a mechanism referred to as port prioritization.
To determine whether the power requirements of the PoE devices you 
plan to connect to the switch exceed its power budget, refer to their 
documentation for their power requirements and add the requirements 
together. The switch should be able to power all of the devices 
Table 4. Twisted Pair Cable Requirements for the 10/100/1000Base-T 
Ports at 1000Mbps
Cable Type
1000Mbps
Non-
PoE
PoE
PoE+
Standard TIA/EIA 568-B-compliant 
Category 3 shielded or unshielded 
cabling with 100 ohm impedance and a 
frequency of 16 MHz.
No
No
No
Standard TIA/EIA 568-A-compliant 
Category 5 shielded or unshielded 
cabling with 100 ohm impedance and a 
frequency of 100 MHz.
Yes
Yes
No
Standard TIA/EIA 568-B-compliant 
Enhanced Category 5 (Cat 5e) shielded 
or unshielded cabling with 100 ohm 
impedance and a frequency of 100 MHz.
Yes
Yes
Yes
Standard TIA/EIA 568-B-compliant 
Category 6 or 6a shielded cabling.
Yes
Yes
Yes