Specifications

Altitude 35x0 Access Point Product Reference Guide 15
Power-over-Ethernet Support
When users purchase an Extreme Networks WLAN solution, they often need to place access points in
obscure locations. In the past, a dedicated power source was required for each access point in addition
to the Ethernet infrastructure. This often required an electrical contractor to install power drops at each
access point location.
An approved power injector solution merges power and Ethernet into one cable, reducing the burden of
installation and allows optimal access point placement in respect to the intended radio coverage area.
The AP3510 Power Injector is a single-port, 802.3af compliant Power over Ethernet hub combining low-
voltage DC with Ethernet data in a single cable connecting to the access point. The Power Injector’s
single DC and Ethernet data cable creates a modified Ethernet cabling environment on the access
point’s LAN port eliminating the need for separate Ethernet and power cables.
The AP3550 Power Tap is a single-port Power over Ethernet hub combining low-voltage DC with
Ethernet data in a single cable connecting to the access point. However, the Power Tap is specifically
designed and ruggedized for use with an AP3550’s outdoor deployment.
MU-MU Transmission Disallow
The access point’s MU-MU Disallow feature prohibits MUs from communicating with each other even if
on the same WLAN, assuming one WLAN is configured to disallow MU-MU communication.
Therefore, if an MU’s WLAN is configured for MU-MU disallow, it will not be able to communicate
with any other MUs connected to this access point.
Voice Prioritization
Each access point WLAN has the capability of having its QoS policy configured to prioritize the
network traffic requirements for associated MUs. A WLAN QoS page is available for each enabled
WLAN on both the 802.11a and 802.11b/g radio.
Use the QoS page to enable voice prioritization for devices to receive the transmission priority they may
not normally receive over other data traffic. Voice prioritization allows the access point to assign
priority to voice traffic over data traffic, and (if necessary) assign legacy voice supported devices (non
WMM supported voice devices) additional priority.
Support for CAM and PSP MUs
The access point supports both CAM and PSP powered MUs. CAM (Continuously Aware Mode) MUs
leave their radios on continuously to hear every beacon and message transmitted. These systems
operate without any adjustments by the access point.
A beacon is a uniframe system packet broadcast by the AP to keep the network synchronized. A beacon
includes the ESSID, MAC address, Broadcast destination addresses, a time stamp, a DTIM (Delivery
Traffic Indication Message) and the TIM (Traffic Indication Map).
PSP (Power Save Polling) MUs power off their radios for short periods. When a MU in PSP mode
associates with an access point, it notifies the access point of its activity status. The access point
responds by buffering packets received for the MU. PSP mode is used to extend an MU’s battery life by
enabling the MU to “sleep” during periods of inactivity.