Paradyne COMSPHERE 3821Plus User Manual page 15

Label Color
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
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
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
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
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
Off:
OH green Off-Hook
ON: The modem indicated by the A, B, or C LED is off-hook and set for Dial.
Off:
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-GB20-30
Table 1-1
3821 Plus LEDs
Front Panel LED is ON, Modem A is connected to the SDCP.
Front Panel LED is ON, Modem B is connected to the SDCP.
Front Panel LED is ON, Modem C is connected to the SDCP.
received data to the DTE.
DTR (Data Terminal Ready) signal, or the modem is configured to ignore DTR.
The DTR signal of the modem indicated by the A, B, or C LED is Off.
The modem indicated by the A, B, or C LED is on-hook and set for Dial.
February 1998
Indicates
Introduction
1-3