Status Indicators; Model 3920Plus Diagnostic Control Panel; Model 3921Plus Faceplate And Shared Diagnostic Control Panel (Sdcp); Model 3920Plus Dcp - Paradyne COMSPHERE 3920PLUS Installation And Operation Manual

Model 3920 Plus Diagnostic Control Panel
The diagnostic control panel (DCP) of the Model 3920Plus modem (Figure 3-1) contains status
indicators, pushbutton-type keys, an LCD, and speaker grill.
COMSPHERE 3920 Plus
Model 3921 Plus Faceplate and Shared Diagnostic Control Panel (SDCP)
The shared diagnostic control panel (SDCP), Figure 3-2, is used to manage carrier-mounted
Model 3921Plus modems.
The faceplate of the Model 3921Plus contains LED status indicators that monitor the operation of
the modem. After the SDCP is connected to the modem, the Front Panel indicator of the selected
modem lights to show that the modem is connected.

Status Indicators

The 392xPlus modem status indicators continuously provide information on the modem's
operating condition. All of the status indicators on the Model 3920Plus appear on the DCP
(Figure 3-1), whereas the status indicators for the carrier-mounted Model 3921Plus are located on
the Model 3921Plus modem's faceplate and the SDCP faceplate (Figure 3-2).
The standalone Model 3920Plus modem's DCP has 13 light-emitting diodes (LEDs), and the
carrier-mounted Model 3921Plus has 20 LEDs. These LEDs are listed and described in Table 3-1.
LEDs specific to one model type have the appropriate model number shown in the table.
3920-A2-GN31-30
F1
PWR ALRM DIAG DTR
RTS CTS
108
105 106
Figure 3-1. Model 3920 Plus DCP
November 1996
F2 F3
TXD LSD RXD SQ TEST RATE DIAL
103 109 104 142
DCP Operation
496-14412-02
3-3