Multitech MultiConnect BT MTS2BTA Quick Start Manual page 6

Multi-Tech Systems, Inc. Quick Start Guide
Making the Connections
Directions for the MTS2BTA (Externally Powered)
Turn off your PC. Place the adapter in a convenient location.
Connect it to your PC's serial port and plug in the power.
Directions for the MTS2BTA-R (Powered through
Pin 6 of an RS-232 Cable)
Turn off your PC. Place the adapter in a convenient
location. Then connect it to your PC's serial port.
The MTS2BT-R draws its power from Pin 6 of the
RS-232 cable.
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