LED Indicators
LED
Description
TD
Transmit Data. This LED is lit when adapter is transmitting data to another adapter.
RD
Receive Data. This LED is lit when the adapter is receiving data from another adapter.
CD
Carrier Detect. This LED is lit when the adapter detects a valid carrier signal from another
adapter.
It is on when the adapter is communicating with the other adapter and off when the link is
broken.
TR
Terminal Ready. (Also called Data Terminal Ready.) This LED indicates the PC is turned
on and ready to communicate. This LED is lit when a data communications program
initializes the adapter. It goes off when the communications program disconnects the COM
port. When it goes off, a connected adapter will disconnect.
PWR
Power. This LED Indicates the presence of DC power when lit.
Multi-Tech Systems, Inc. Serial-to-Bluetooth Adapter User Guide (S000370B)
Chapter 1 – Description and Specifications
8
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