05-2806A01, Rev. L
MDS iNET Series Reference Manual
41
•
Data Rate
(configurable on RM Only)
—Shows the over-the-air data rate setting for the Remote radio.
Remotes can operate at one of two data rates when communicating with an AP: 1024 kbps (1 Mbps)
or 512 kbps for iNET-II and 256 kbps or 512 kbps for iNET. The fastest data rate is possible with
strong RF signal levels, typically stronger than –77 dBm RSSI including a 15 dB fade margin.
When the data rate is set to
AUTO
, the remote radio is able to change speeds based on the signal qual-
ity criteria set in the Auto Data Rate submenu described later in this section (see Page 42).
[iNET:
256 kbps, 512 kbps, AUTO; 256 kbps
] [iNET-II:
512 kbps, 1024 kbps, AUTO; 512 kbps
]
•
Compression
(configurable on AP Only)
—Enabling this option uses LZO compression algorithm for
over-the-air data. Varying levels of data reduction are achieved depending on the nature of the infor-
mation. Text files are typically the most compressible, whereas binary files are the least compress-
ible. On average, a 30% increase in throughput can be achieved with compression enabled.
[
enabled, disabled; disabled
]
•
Dwell Time
(configurable on AP Only)
—Duration (in milliseconds) of one hop on a particular fre-
quency in the hopping pattern. Remotes get their value from AP upon association.
[iNET:
16.4, 32.8, 65.5, 131.1, 262.1; 65.5
]
[iNET-II:
16.4, 32.8, 65.5, 131.1; 65.5
]
TIP:
If a packet is being transmitted and the dwell time expires, the packet will be completed before hop-
ping to the next frequency.
•
Beacon Period
(configurable on AP Only)
—Amount of time between Beacon transmissions (in msec).
Available Intervals for iNET:
Normal
(104 ms),
Fast
(52 ms),
Faster
(20 ms),
Slow
(508 ms),
Moder-
ate
(208 ms). These values provide relatively quick association times where Fast is very fast (
5 sec)
and the other end, the largest recommended value, the 508 ms period is slow (
60 sec). [
Normal,
Fast, Faster, Slow, Moderate; Normal
]
For iNET II:
Normal
(52 ms),
Fast
(26 ms),
Faster
(10 ms),
Slow
(254 ms),
Moderate
(104 ms).
TIP:
Increasing the Beacon Period will provide a
small improvement
in network data throughput. Short-
ening it decreases the time needed for Remotes to associate with the AP. A short beacon period is usu-
ally only a benefit when there are mobile Remotes in the network.
•
Hop Pattern Seed
(configurable on AP Only)
—A user-selectable value to be added to the hop pattern
formula. This is done in the unlikely event that identical hop patterns are used with two collocated
or nearby networks. Changing the seed value will minimize the potential for RF-signal collisions in
these situations. (This field is only changeable on an Access Point. Remotes read the AP’s value upon
association.) [
0 to 255; 1
]
•
Mobility Configuration
(RM Only)
—This selection brings up a submenu where parameters related to
mobile operation may be set. For details,
See “Mobility Configuration Menu” on Page 47.
•
Fragmentation Threshold
(configurable on RM Only)
—Before transmitting over the air, if a packet
exceeds this number of bytes, the transceiver sends the packet in multiple fragments that are reas-
sembled before being delivered over the Ethernet interface at the receiving end. Only even numbers
are acceptable entries for this parameter. This option will only be configurable if Wireless Encryption
is disabled. (See “Performance Notes” on Page 117 for additional information.) [
256–1600 bytes;
1600
]
TIP:
In an interference-free environment this value should be large to maximize throughput. If interference
exists then the value should be set to smaller values. The smaller the packet the less chance of it being
interfered with at the cost of slightly reduced throughput.
NOTE:
The radio does not support the simultaneous use of Fragmentation and Encryption. If encryption
is enabled (other than RADIUS), the fragmentation option will not be available.
•
RTS Threshold
—Number of bytes for the over-the-air RTS/CTS handshake boundary. (See “Perfor-
0 to 1600 bytes; 500
]
NOTE:
While the transceiver accepts RTS Threshold settings below 100, the lowest functioning value is
100.
Summary of Contents for MDS iNET Series
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