User's Manual

DRAFT - CISCO CONFIDENTIAL
3-5
Cisco Aironet 1400 Series Wireless Bridge Hardware Installation Guide
OL-4072-01
Chapter 3 Mounting and Alignment Overview
Aligning the Antenna Using LED Indications
You use the Install LED to determine when the bridge successfully associates with a remote bridge and
to verify its mode of operation. After association, the other three LEDs indicate signal strength (see
Table 3-3).
The startup and association sequence depends on the bridge configuration, which can be one of the
following types:
• Default—The bridge attempts to associate with a root bridge for 30 seconds. If it does not associate
with a root bridge, it then attempts to associate with a non-root bridge.
• Pre-configured—The bridge attempts to associate with a remote bridge in the configured mode,
either root or non-root. Because there are no time-outs, it is easier to align the antenna.
Aligning the Antenna Using LED Indications
You can align the integrated antenna using LEDs after the bridge successfully associates with a remote
bridge. In the installation mode before association to another bridge, the Install LED blinks amber. If the
bridge associates to a root bridge, the Install LED turns steady amber. If the bridge does not associate to
a root bridge in the first 30 seconds, the Install LED blinks green to indicate beacons are being
transmitted and the bridge is waiting for another non-root bridge to associate. After association, the
Install LED turns into steady green and the Ethernet, status, and radio LEDs then display signal strength
as shown in Table 3-3).
Note For the signal level (dBm), a smaller number represents a stronger signal because the signal level is given
as a negative value.
Note Each time you move the antenna, you must wait approximately 20 seconds before the LED patterns are
valid.
Table 3-3 LED Installation Mode Signal Strength Display
Signal Level (dBm) Ethernet LED Status LED Radio LED
>-44 On On On
-47 to -44 Fast blink
1
On On
-50 to -47 Medium blink
2
On On
-53 to -50 Slow blink
3
On On
-54 to -53 Off On On
-57 to -54 Off Fast blink
1
On
-60 to -57 Off Medium blink
2
On
-63 to -60 Off Slow blink
3
On
-66 to -63 Off Off On
-69 to -66 Off Off Fast blink
1
-72 to -69 Off Off Medium blink
2
-75 to -72 Off Off Slow blink
3
< -75 Off Off Off