Cisco Aironet 1300 Series - Aligning the Antenna Using RSSI LED Indications

CISCO CONFIDENTIAL - First Draft
3-5
Cisco Aironet 1300 Series Bridge Hardware Installation Guide
OL-5048-01
Chapter 3 Mounting and Alignment Overview
Aligning the Antenna Using RSSI LED Indications
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.
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 60 seconds. If it does not associate
with a root bridge, it then attempts to associate with a non-root bridge.
• Preconfigured—The bridge attempts to associate with a remote bridge in the configured mode,
either root or non-root. Because there are no timeouts, it is easier to align the antenna.
Aligning the Antenna Using RSSI 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 amber. If the bridge does not associate to a root
bridge in the first 60 seconds, the Install LED blinks green to indicate beacons are being transmitted and
the bridge is waiting for another non-root bridge to associate.
During the first 20 seconds after association, the bridge reads the receive signal strength indictor (RSSI)
levels and records the maximum level received. Once 20 seconds have elapsed, the Install LED turns
amber and the Ethernet, status, and radio LEDs then display the relative RSSI levels compared to the
maximum received. The RSSI LED indications are 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.
Table 3-3 LED Installation Mode RSSI Display
RSSI Level (dBm) Ethernet LED Status LED Radio LED
>–44 On On On
–47 to –44 Fast blink
1
1. Slow blinking rate of 1 blink/sec.
On On
–50 to –47 Medium blink
2
2. Medium blinking rate of 2 blinks/sec.
On On
–53 to –50 Slow blink
3
3. Fast blinking rate of 4 blinks/sec.
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