Rs-232 Port - Juniper mesa 2 Owner's Manual

Antenna for RFID Reader
The antenna is a circularly polarized antenna. This has
reduced range, but allows the Mesa 2 to be held in any
orientation (linear antennas can have longer range if held
in the right orientation).
For the EU and Australia: When the RFID is in use, cellular is
disabled. If you have a cellular connection and you hit the
scan button for RFID, the cellular connection will disappear
for 10-20 seconds.

RS-232 Port

An RS-232 9-Pin D-Sub connector is an option for the Mesa
2. Depending on the factory configuration, it will provide
either 5 VDC or 12 VDC on pin 9.
There is a RS-232 Control Panel to configure the behavior of
the RS-232 port. There is a link to it on the desktop.
When you open the RS-232 Control Panel, the default
configuration is shown:
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Chapter 3 Optional Features and Accessories