Allied Telesis AT-x230-18GP - Manual (Page 29)

AT-x230-10GP and AT-x230-18GP Switches Installation Guide
19
Power budget
The AT-x230-10GP and AT-x230-18GP switches each have a power
budget of 124 and 247 watts, respectively. This is the maximum amount of
power the switches can provide at one time to the powered devices.
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
simultaneously as long as the total is below its power budget. If the total
exceeds the available power budget, you should consider reducing the
T ABLE 3. T WISTED PAIR CABLE REQUIREMENTS FOR THE 10/1000BASE-T
AND
100BASE-TX
PORTS AT
1000M
BPS
Cable type
1000Mbps
Non-PoE PoE PoE+
Cat 3: 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
Cat 5: 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
Cat 5e: 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
Cat 6 or 6a: Standard TIA/EIA
568-B-compliant Category 6 or
6a shielded cabling
Yes Yes Yes