Installation manual

13
Using the Diagnostic Control Panel (DCP)
The DCP’s liquid crystal display (LCD) consists of two 16-character lines which display modem status, control
functions, and configuration options as well as indicating your location in the Top-Level menu tree.
To change a factory template from the Sync Leased preset configuration using the DCP, perform the following
steps:
1. Press the function key below Configure to select the Configure branch.
The LCD now displays Ld EditArea frm.
2. Press the
key until Factory comes into view, then press the F1 key to display the factory preset
configurations.
3. Press the
key until the appropriate factory preset appears on the LCD, and press the corresponding
function key to select your choice. (For certain factory presets you will also need to choose the
appropriate mode.)
4. Choose Function appears and displays the Edit and Save functions.
5. Press the F3 key (Save) to save the new factory preset configuration to one of three configuration areas,
Active (Saved), Customer 1, or Customer 2.
(These three configuration areas are nonvolatile memory locations. Active (Saved) contains the most
recently saved changes to any configuration options. In the event of power loss, the modem retrieves these
configuration options. Customer 1 and Customer 2 are user-defined configuration areas.)
The LCD now displays Sav EditArea to.
6. Press the
key until the appropriate configuration area appears on the LCD, then press the
corresponding function key to select your choice. (Saving configuration options to the Active (Saved)
configuration area automatically saves them to the Active (Operating) configuration area.) The LCD
displays Command Complete.
7. The modem is now configured with the selected factory template. Press the
key to return to the
Top-Level menu.
Removing and Replacing Model 3920 Plus Modems
To remove and replace a Model 3920Plus modem, perform the following steps:
1. Make sure the modem is offline, and press the modem’s rear panel power switch to the OFF position.
2. Disconnect the power cord from the ac power outlet, and then disconnect the dc power cable from the
connector on the rear of the modem.
3. Disconnect the dial and leased-line modular cords from the modem’s rear panel.
4. Disconnect the DTE interface cables from the modem’s rear panel.
If the modem is to be removed for service, return it to AT&T Paradyne using the procedures described in
Government Requirements and Equipment Return.
5. Install the replacement modem as described in the Model 3920Plus Modem Installation section, and
configure it the same way as the modem being replaced.