Modem Lights
Have you ever looked at your modem (if you have one)? If you do, you'll almost certainly see a number of lights with two- or three- character names below each one. These lights are giving you information about the status of your modem and it's communication with a computer.
| Light | Full Name | Purpose |
|---|---|---|
| AA | Auto Answer | The modem is set to answer the phone if it detects that someone is calling the line. |
| CD | Carrier Detect | This indicates that the modem and a computer have detected each other (they have carrier). |
| CS | Clear To Send | Lights up when the communications line is clear to send data. |
| HS | High Speed | Indicates the modem is ready to transmit at it's highest possible speed. |
| MR | Modem Ready | The modem is ready to transmit. |
| OH | Off Hook | Tells you the phone line is ready for use. |
| RD | Receive Data | Flashes to indicate the modem is receiving data. |
| RS | Request to Send | The computer is ready to send data. |
| SD | Send Data | Flashes to indicate the modem is sending data. |
| TR | Terminal Ready | Indicates the computer's communication program is active. |