GE MDS iNET 900, Reference Manual, Page: 63 / 188

05-2806A01, Rev. J iNET Series Reference Manual 53
est 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 quality criteria set in the Auto
Data Rate submenu described later in this section (see Page 55).
[iNET:
256, 512, AUTO; AUTO
] [iNET-II:
512, 1024, AUTO; AUTO
]
•
Compression
(AP Only)
—Enabling this option uses LZO com-
pression algorithm for over-the-air data. Varying levels of data
reduction are achieved depending on the nature of the informa-
tion. Text files are typically the most compressible, whereas
binary files are the least compressible. On average, a 30%
increase in throughput can be achieved with compression
enabled.
•
Dwell Time
—Duration (in milliseconds) of one hop on a particu-
lar frequency in the hopping pattern. (This field is only change-
able on an Access Point. Remotes get their value from AP upon
association.)
[iNET:
16.4, 32.8, 65.5, 131.1, 262.1; 32.8
]
[iNET-II:
8.2, 16.4, 32.8, 65.5, 131.1; 32.8
]
TIP: If a packet is being transmitted and the dwell time
expires, the packet will be completed before hopping to the next
frequency.
•
Beacon Period
—Amount of time between Beacon transmissions
(in msec).
Available Intervals:
Normal
(104 ms),
Fast
(52 ms),
Faster
(26
ms),
Slow
(508 ms),
Moderate
(208 ms). These values provide rel-
atively 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; Nor-
mal
]
TIP: Increasing the Beacon Period will provide a small
improvement in network data throughput. Shortening it
decreases the time needed for Remotes to associate with
the AP. A short beacon period is usually only a benefit
when there are mobile Remotes in the network.
•
Hop Pattern Seed
—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-sig-
nal collisions in these situations. (This
fi eld is only changeable
on an Access Point. Remotes read the AP’s value upon associa-
tion.) [
0 to 255; 1
]
•
Mobility Con fi guration
—This selection brings up a submenu
where parameters related to mobile operation may be set. For
details, See
“ Mobility Configuration Menu” on Page 58
.