What is the maximum recommended length for a POE cable for 802.3af and 802.3at from Point A to Point B?

What is the maximum recommended length for a POE cable for 802.3af and 802.3at from Point A to Point B?

• 85m
• 50m
• 70m
• 100m 

EXPLANATION

Ethernet and POE both restrict cable distances to 100 metres (328 feet) between network ports. However, POE-powered devices such as IP cameras and wireless access points frequently must be located at far greater distances from the nearest network switch or power outlet.

For passive POE you should use a 24V power supply. 24V passive POE will power an OM series AP up to about 50 meters or 100-150 feet. 802.3af and 802.3at PoE standards have a distance limit of 100 meters or 328ft which is also the limit for the data transmission for Ethernet cables