Brocade Mobility 7131 Access Point Product Reference Guide (Supporting software release 4.4.0.0 and later) - Manual (Page 83)

Brocade Mobility 7131 Access Point Product Reference Guide 71
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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, either 3af, Mid Power or Full Power for a Mobility 7131 Access Point or 3af, 3at
or Full Power for a Mobility 7131N Access Point model. Based on the power level, the access point
configures its power consumption based on the table below:
NOTE
Single radio models always operate using a full power configuration. The power management
configurations described in this section do not apply to single radio models.
NOTE
An Mobility 7131N model access point has different available power from a Mobility 7131 Access
Point model. An Mobility 7131N 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 specifically for a Mobility 7131 Access Point or Mobility
7131N Access Point, or using the single-port Power Injector (Part No. AP-PSBIAS-1P3-AFR).
Mobility 7131 Access Point
Available Power Mobility 7131 Access Point Operational Configuration (for Dual Radio)
13 watts (3af)
Power Status: 3af Two radios, processor running at 500 MHz, GE1 port
(1000BASE-T) and GE2 port disabled.
18 watts
Power Status: Mid Power Two radios, processor running at 500 MHz, GE1 port (1000BASE-T)
and GE2 port (100 BASE-T).
24 watts or external power
supply
Power Status: Full Power Two radios, processor running at 500 MHz, GE1 port (1000BASE-T)
and GE2 port (1000 BASE-T).