User's Manual
Table Of Contents
- Contents
- 1. Introduction
- The Harmony Family
- System Requirements
- The Product Package
- 2. Installation
- Installation Procedure
- Mounting Option
- LED Indicators
- Power Requirements
- 3. Wirefree Operation
- Harmony Architecture
- The IEEE 802.11b Specification
- Roaming Between Harmony 802.11b Access Points
- Roaming Guidelines
- 4. Configuration Parameters
- Basic Settings
- AP Name
- Physical Address
- Enable AP
- Partnered APC
- Channel
- Supported Clients
- SSID
- IP Addressing
- Security Settings
- WEP Encryption
- WEP Key Size
- WEP Keys
- Advanced Settings
- Supported Rates
- RTS/CTS
- 5. Performance Hints
- Microwave Ovens
- Range
- 6. Troubleshooting
- How to Obtain Help with Your LAN Installation
- LED Error Codes
- Common Problems and Solutions
- A. Parameters
- B. IEEE 802.11b Direct Sequence Channels
- C. Harmony 802.11b Access Point Specifications
- D. How to Reach Technical Support
- Index
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Advanced Settings
The Advanced Settings tab allows you to configure the parameters described below.
Supported Rates
The IEEE 802.11b specification supports four data rates: 11 Mbps, 5.5 Mbps, 2 Mbps,
and 1 Mbps. As a mobile client travels further and further away from an 802.11b
Access Point, the data rate automatically decreases in order to maintain a usable radio
connection. Therefore, a client that is close to an Access Point may operate a 11 Mbps,
but a client that is far away from the Access Point may operate at 2 Mbps.
By default, the Harmony 802.11b Access Point supports all four data rates. However,
you can prevent the Access Point from using a specified data rate by unchecking the
appropriate box.
For example, if your application requires that the Harmony 802.11b PC Card maintains
an 11 Mbps data rate, you can uncheck the 5.5 Mbps, 2 Mbps, and 1 Mbps options.
The Access Point and PC Card will always attempt to operate at 11 Mbps but this may
greatly reduce the size of the coverage area provided by the Access Point. Once the PC
Card moves outside the range that provides 11 Mbps operation, the PC Card will lose
connectivity with the network.
RTS/CTS
The 802.11b specification supports optional RTS/CTS communication based on packet
size.
Without RTS/CTS, a sending radio listens to see if another radio is already using the
medium before transmitting a data packet. If the medium is free, the sending radio
transmits its packets. However, there is no guarantee that another radio is not transmit-
ting a packet at the same time, causing a collision.
When RTS/CTS occurs, the sending radio first transmits a Request to Send (RTS)
packet to confirm that the medium is clear. When the receiving radio successfully
receives the RTS packet, it transmits back a Clear to Send (CTS) packet to the sending