Brocade Mobility 7131N-FGR Access Point Product Reference Guide (Supporting software release 4.0.0.0-35GRN and later) - Manual (Page 71)

Brocade Mobility 7131N-FGR Product Reference Guide 59
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Configuring power settings
4
NOTE
The Apply button is not needed for restoring the Brocade Mobility 7131N-FGR Access Point
default configuration or restarting the Brocade Mobility 7131N-FGR Access Point.
7. Click Undo Changes (if necessary) to undo any changes made. Undo Changes reverts the
settings displayed on the System Settings screen to the last saved configuration.
8. Click Logout to securely exit the Brocade Mobility 7131N-FGR Access Point applet. A prompt
displays confirming the logout before the applet is closed.
Configuring power settings
Use the Power Setting screen to select one of two power modes, 3af or Auto. When automatic is
selected, the access point safely operates within available power. Once the power configuration is
determined, the access point configures its operating power characteristics based on its SKU and
power configuration.
The access point uses a complex programmable logic device (CPLD). The CPLD determines proper
supply sequencing, the maximum power available and other status information. One of the primary
functions of the CPLD is to determine the access point’s maximum power budget. When the AP is
powered on (or performing a cold reset), the CPLD determines the maximum power provided by the
POE device and the budget available to the access point. The CPLD also determines the access
point hardware SKU and the number of radios. If the access point’s POE resource cannot provide
sufficient power to run the access point (with all intended interfaces enabled), some of the
following interfaces could be disabled or modified:
• The access point’s transmit and receive algorithms could be negatively impacted
• The access point’s transmit power could be reduced due to insufficient power
• The access point’s WAN port configuration could be changed (either enabled or disabled)
Automatic is the default mode. When Auto is selected, the CPLD determines how much power is
available at startup (3af, 3at or Full Power for a Brocade Mobility 7131N-FGR Access Point).
NOTE
A Brocade Mobility 7131N-FGR Access Point model uses 22 watts when its power status is 3af,
23 - 26 watts when its power status is 3at and 27 watts when its power status is Full Power.
CAUTION
The power modes described in the section are only obtainable using the 48-Volt Power Supply
(Part No. 50-14000-247R) designed for a Brocade Mobility 7131N-FGR Access Point.
NOTE
Radio transmit power is not used as one of the factors to determine the available power budget. If
an external power supply is used, it is assumed it will provide full power. When operating using full
power, each radio has 3x3 antenna mode support and its intended transmit power budget.