38 Hardware Configuration
MX7 Reference Guide E-EQ-MX7RG-B
COM Port
The MX7 has one mini D 20-pin serial port (a multifunction I/O port) that can be configured by
the user.
Figure 2-2 COM1 Port
RS-232 Serial Port
Configured as COM1. Bi-directional full duplex and supports data rates up to 115 Kb/s. The port
does not have RI or CD signals nor does it support 5V switchable power on pin 9 for tethered
scanners. The serial port driver supports full duplex communications over the serial port. It
supports data exchange via ActiveSync, but does not automatically start ActiveSync when
connected.
The “Cable, Multipurpose RS-232 and Power” and “Adapter, RS-232 terminal port to D9 male”
accessories can be used with the RS-232 serial port.
External AC power is available when the multipurpose RS-232/Power cable is connected.
External AC power is not available for the “Adapter, RS-232 terminal port to D9 male” option.
Power is drawn from the main battery pack when this adapter is connected..
USB Client Port
The MX7 has one USB Client port for ActiveSync applications. An accessory USB cable, “Cable,
Multipurpose USB and Power” is available to connect the MX7 to a USB Type A plug on a PC
for ActiveSync functions.
External AC power is available when the multipurpose USB Client/Power cable is connected.
Audio Connection
An audio headset interface is available using the “Adapter, Audio” accessory with the I/O port.
The connection cable connects the MX7 to a Voxware quick disconnect 4-pin interface. This
cable adapts to specific styles of headsets for voice input, stereo or mono output. The MX7 with a
Summit Client supports mono only. A 3-wire connector with (at a minimum) connections for
ground, microphone, and 1 speaker. Connecting the headset to the MX7 COM port turns off audio
output to the MX7 speaker on the front of the mobile device. All sounds previously directed to the
speaker are redirected to the headphone, including beeps. Bias voltage for an electric condenser
microphone is available.
External AC power is not available for this option. Power is drawn from the main battery pack.
