Operation

Table 3-4. Data Port LEDs

Name

Color

Meaning

 

 

 

 

DTR

Green

Monitors the state of interchange circuit CD (CCITT 108/1, /2) –

 

 

Data Terminal Ready received from the synchronous data DTE.

 

 

ON :

DTR is being asserted by the synchronous data

 

 

 

DTE.

 

 

OFF :

DTR is not being asserted.

 

 

 

TXD

Yellow

Monitors activity on interchange circuit BA (CCITT 103) –

 

 

Transmitted Data. This is the data sent from the synchronous

 

 

data DTE to the data port on the DSU/CSU.

 

 

ON :

Ones are being received from the synchronous

 

 

 

data DTE.

 

 

OFF :

Zeros are being received from the synchronous

 

 

 

data DTE.

 

 

CYCLING: Both ones and zeros are being received from the

 

 

 

synchronous data DTE.

 

 

 

RXD

Yellow

Monitors activity on interchange circuit BB (CCITT 104) –

 

 

Received Data. This is data sent to the synchronous data DTE

 

 

from the data port on the DSU/CSU.

 

 

ON :

Ones are being sent to the synchronous data

 

 

 

DTE.

 

 

OFF :

Zeros are being sent to the synchronous data

 

 

 

DTE.

 

 

CYCLING: Both ones and zeros are being sent to the

 

 

 

synchronous data DTE.

 

 

 

CTS

Yellow

Monitors the state of interchange circuit CB (CCITT 106) –

 

 

Clear-to-Send sent to the synchronous data DTE.

 

 

ON :

CTS is being asserted by the DSU/CSU.

 

 

OFF :

CTS is not being asserted.

 

 

 

 

RTS

Yellow

Monitors the state of interchange circuit CA (CCITT 105) – Request-to-Send received from the synchronous data DTE.

ON : RTS is being asserted by the synchronous data DTE.

OFF : RTS is not being asserted.

3-4

August 2000

3162-A2-GB20-40

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Image 30
HP 3162 manual Data Port LEDs Name Color Meaning