Datasheet

AP-5131 Access Point Product Reference Guide
1-14
1.1.23 Multi Function LEDs
The AP-5131 houses seven LED indicators. Four LEDs exist on the top of the AP-5131 and are visible
from wall, ceiling and table-top orientations. Three of these four LEDs are single color activity LEDs,
and one is a multi-function red and white status LED. Two LEDs exist on the rear of the AP-5131 and
are viewable using a single (customer installed) extended light pipe, adjusted as required to suit
above the ceiling installations. For detailed descriptions of the AP-5131 LEDs and their functionality,
see LED Indicators on page 2-20.
1.2 Theory of Operations
To understand AP-5131 management and performance alternatives, users need familiarity with
AP-5131 functionality and configuration options. The AP-5131 includes features for different
interface connections and network management.
The AP-5131 uses electromagnetic waves to transmit and receive electric signals without wires.
Users communicate with the network by establishing radio links between mobile units (MUs) and
access points.
The AP-5131 uses DSSS (direct sequence spread spectrum) to transmit digital data from one device
to another. A radio signal begins with a carrier signal that provides the base or center frequency. The
digital data signal is encoded onto the carriers using a DSSS chipping algorithm. The AP-5131 radio
signal propagates into the air as electromagnetic waves. A receiving antenna (on the MU) in the path
of the waves absorbs the waves as electrical signals. The receiving MU interprets (demodulates) the
signal by reapplying the direct sequence chipping code. This demodulation results in the original
digital data.
The AP-5131 uses its environment (the air and certain objects) as the transmission medium.The
AP-5131 can either transmit in the 2.4 to 2.5-GHz frequency range (802.11b/g radio) or the 5.2 GHz
frequency range (802.11a radio), the actual range is country-dependent. Symbol devices, like other
Ethernet devices, have unique, hardware encoded Media Access Control (MAC) or IEEE addresses.
MAC addresses determine the device sending or receiving data. A MAC address is a 48-bit number
written as six hexadecimal bytes separated by colons.
For example: 00:A0:F8:24:9A:C8
Also see the following sections:
• Cellular Coverage
• Network Topology