User`s manual

Bluetooth and 802.11b share the same spectral band (2.4GHz). Therefore, cross
interference will be inevitable. The results can be a reduction in throughput. In
general Bluetooth devices are less susceptible to coexistence problems because
of the following reasons:
• Bluetooth is a Frequency Hopping Spread Spectrum technology (FHSS)
which means that if a channel is busy, Bluetooth will immediately hop to a
different channel to transmit the packet of information. 802.11b is a
Direct Sequence Spread Spectrum (DSSS) technology.
• Shorter packets – Bluetooth packets are typically fraction of a millisecond
long compared with a few milliseconds for 802.11b. This reduces their
collision susceptibility.
• Bluetooth is less considerate. An 802.11b station first waits for silence
and only then transmits. A Bluetooth, in the other hand, is inconsiderate
of surrounding transmissions – it simply “barges in” whenever has
something to transmit.
In summary, these technologies can coexist. However, if the number of
Bluetooth devices is very large around a wireless network (802.11b) most likely
the throughput of the 802.11b devices will be affected.
The Bluetooth Organization SIG is working in a MAC level switching solution.
This means switching functionality at the baseband level of the technologies that
most likely will be part of future revisions of the specification. Also, eventually a
likely future scenario is that 802.11 will migrate from 2.4 GHz to 5 GHz (upgrade
to 801.11a) while Bluetooth will remain using 2.4 GHz.
II. Authentication
Authentication is part of the security system included in the Bluetooth standard.
Authentication can be set to “ON” or “OFF” in the printer. By default
authentication is set to “OFF” when the printer is manufactured. To turn
authentication “ON” in Zebra Mobile Printers with the Bluetooth connectivity
option, you can use the label creation software called: Label Vista. This software
can be downloaded from Zebra’s web site. Once you have Label Vista, you need
to connect the printer to your PC using the serial cable P/N BL11757-000. Make
sure the printer port baud rate matches the PC’s serial port baud rate. (See
printer’s User’s Manual). In Label Vista main menu, at the top of the screen,
select: Printer / Utilities / Bluetooth Settings. A window with the default settings
will pop up to allow you to change the settings.
Another way to change authentication settings is by sending the command: ! U1
setvar “bluetooth.authentication” “on”. (See Bluetooth parameters P14-7 in the
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