Monitoring the DSU
Port LEDs
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| ALARM TEST |
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| OOS OOF |
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| TXD | (103) |
| (104) |
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OK | DM | NS |
| RXD |
| RTS |
| CTS |
| DTR |
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TXD ± Transmitted Data:
ON | ± Receiving all 0s from the DTE. |
OFF | ± Receiving all 1s from the DTE. |
Blinking ± User data is being transferred.
RXD ± Received Data:
ON | ± Sending all 0s to the DTE. |
OFF | ± Sending all 1s to the DTE. |
Blinking ± User data is being transferred.
RTS ± Request to Send:
ON ± DTE is activating a control signal to indicate readiness to transmit data.
CTS ± Clear to Send:
ON ± DSU is activating a control signal to indicate to the DTE that it can start sending data.
DTR ± Data Terminal Ready:
ON ± DTE is activating a control signal to indicate readiness for operation.
November 1997 |
