Proxim wireless ORiNOCO AP-4000MR-LR User's Guide download pdf (Page 67)

Advanced Configuration AP-4000MR User Guide

Interfaces

MIB (SNMP) Requirements

DCS feature can be managed and monitored by MIB objects too. All the configuration parameters are present for both

Interface A and Interface B separately. The oriWirelessIfDCSThreshold object stores the DCS Threshold from 1 to 10.

See the table below for defaults and units for all objects.

Dynamic Frequency Selection/Radar Detection (DFS/RD)

In order to prevent interference with radar systems and other devices that occupy the 5 GHz band, 802.11a APs certified

in the ETSI, TELEC, FCC, and IC regulatory domains (see Affected Countries) and operating in the middle and high

frequency bands select an operating channel through a combination of Auto Channel Select (ACS) and Dynamic

Frequency Selection (DFS)/Radar Detection (RD).

During boot-up, ACS scans the available channels and selects the best channel. Once a channel is selected, the AP

performs a channel availability check for 60 seconds to ensure that the channel is not busy or occupied by radar, and

then commences normal operation. (In Canada, if the channel was previously blacklisted, the AP scans for 600 seconds

before commencing normal operation if the selected channel frequency is in the 5600 - 5650 MHz range). When the AP

enters normal operation, DFS works in the background to detect interference in that channel. If interference is detected,

the AP sends a trap, disassociates all clients, blacklists the channel, and reboots. After it reboots, ACS re-scans and

selects a better channel that is not busy and is free of radar interference.

If ACS is disabled, only channels in the lower, upper, and ISM frequency bands are available for use:

• 36: 5.180 GHz (default)

• 40: 5.200 GHz

• 44: 5.220 GHz

• 48: 5.240 GHz

• 149: 5.745 GHz

• 153: 5.765 GHz

• 157: 5.785 GHz

• 161: 5.805 GHz

• 165: 5.825 GHz

If you are using the unit in a country and band that require DFS, keep in mind the following:

• DFS is not a configurable parameter; it is always enabled and cannot be disabled.

• You cannot manually select the device’s operating channel; you must let the unit select the channel. You may make

channels unavailable by manually “blacklisting” them and preventing those channels being selected, in accordance

with local regulations or interference. You can also display the Channel Blacklist Table to view the channels that have

been blacklisted by the AP.

Feature MIB/Group Object Data type Values Access Default

DCS orinoco-> orinocoIf->

orinocoWirelessIf ->

oriWirelessIfPropertie

sTable

oriWirelessIf

DCSStatus

Integer Enable (1)

Disable (2)

RW 2

DCS

Thresho

orinoco-> orinocoIf->

orinocoWirelessIf ->

oriWirelessIfPropertie

sTable

oriWirelessIf

DCSThreshol

Integer 1 to 10 RW 5

1 2 ... 62 63 64 65 66 67 68 69 70 71 72 ... 266 267

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Proxim wireless ORiNOCO AP-4000MR-LR User's Guide Page 67

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