Introduction

 

 

 

Table 1-1

 

 

 

3821Plus LEDs

 

 

 

 

Label

Color

 

Indicates

 

 

 

ALRM A

red

Alarm A

 

 

ON:

Modem A has detected a problem with its operation.

 

 

 

ALRM B

red

Alarm B

 

 

ON:

Modem B has detected a problem with its operation.

 

 

 

ALRM C

red

Alarm C

 

 

ON:

Modem C has detected a problem with its operation.

 

 

 

Mod A

green

Modem A

 

 

ON:

The status of Modem A is reflected by the TXD, RXD, CD, RI, DTR, and OH LEDs. If the

 

 

 

Front Panel LED is ON, Modem A is connected to the SDCP.

 

 

 

Mod B

green

Modem B

 

 

ON:

The status of Modem B is reflected by the TXD, RXD, CD, RI, DTR, and OH LEDs. If the

 

 

 

Front Panel LED is ON, Modem B is connected to the SDCP.

 

 

 

Mod C

green

Modem C

 

 

ON:

The status of Modem C is reflected by the TXD, RXD, CD, RI, DTR, and OH LEDs. If the

 

 

 

Front Panel LED is ON, Modem C is connected to the SDCP.

 

 

 

TXD

green

Transmit Data

 

 

ON:

The modem indicated by the A, B, or C LED is receiving data from the DTE to transmit.

 

 

The TXD and RXD LEDs blink for 5 seconds after a modem is selected using NMS or the SDCP.

 

 

 

RXD

green

Receive Data

 

 

ON:

The modem indicated by the A, B, or C LED is transferring received data to the DTE.

 

 

The TXD and RXD LEDs blink for 5 seconds after a modem is selected using NMS or the SDCP.

 

 

 

CD

green

Carrier Detect

 

 

ON:

The modem has detected a valid modulation carrier signal and is capable of transferring

 

 

 

received data to the DTE.

 

 

 

RI

green

Ring Indicate

 

 

Cycling ON and Off: The modem indicated by the A, B, or C LED is receiving a ring signal.

 

 

 

DTR

green

Terminal Ready

 

 

ON:

The DTE connected to the modem indicated by the A, B, or C LED has turned ON the

 

 

 

DTR (Data Terminal Ready) signal, or the modem is configured to ignore DTR.

 

 

Off:

The DTR signal of the modem indicated by the A, B, or C LED is Off.

 

 

 

OH

green

Off-Hook

 

 

ON:

The modem indicated by the A, B, or C LED is off-hook and set for Dial.

 

 

Off:

The modem indicated by the A, B, or C LED is on-hook and set for Dial.

 

 

Cycling ON and Off: The modem indicated by the A, B, or C LED is set for leased line operation.

 

 

 

Front

amber

Front Panel

Panel

 

ON:

The SDCP is connected to the modem indicated by the A, B, or C LED.

 

 

 

 

 

 

3821-A2-GB20-40

January 1999

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Paradyne 3821PLUS manual 3821Plus LEDs, Label Color Indicates