Symbol PDT 8100 Series Product Reference Manual page 169

Spectrum24 Network Configuration
Check the Send long preamble headers checkbox if the other devices in
your network are using a long preamble. Devices using Ad Hoc mode must use
the same preamble setting to interoperate. The adapter uses a long preamble
heading by default.
Note that this is a Symbol Technologies operating mode and only works with
other Symbol adapters enabled in the same mode.
• If you select Ad Hoc, enter a 32-character maximum ESSID (802.11 Extended
Service Set Identifier) in the 802.11 ESSID field to identify the wireless local
area network. This ESSID must match the ESSID of other devices using the Ad
Hoc mode.
Enter the channel number in the Channel field. The first adapter configured in
the Ad Hoc network defines the channel number used in the Ad Hoc network.
Each adapter is required to use the same channel to transmit and receive data
to its peers.
Check the Send long preamble headers checkbox if the other devices in
your network are using a long preamble. Devices using Ad Hoc mode must use
the same preamble setting to interoperate. The adapter uses a long preamble
heading by default.
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