Paradyne 392xPLUS Removing and Replacing the Model 3921Plus Modem, 392xPlus Modem Power-Up

Modem Installation

Removing and Replacing the Model 3921Plus Modem

CAUTION

When removing the Model 3921Plus modem from the carrier, always use a ground strap when handling the modem. Always store the Model 3921Plus modems in an antistatic bag when it is removed from the carrier.

It is not necessary to power down the carrier to remove and replace the Model 3921Plus modem. Perform the following steps:

1.Rotate the circuit pack lock until the release tab is exposed (Figure 2-4).

2.Press down on the release tab and pull the modem away from the carrier's backplane.

392xPlus Modem Power-Up

Once your modem is properly connected to the power supply, leased and/or dial lines, and the DTE, press the modem's back panel power switch to the ON position. The modem begins a power-up self-test, in which all DCP LEDs light. This test takes several seconds to perform, and verifies the operation of most hardware components within the modem. If successful, the LCD displays Power on Selftst Passed and continues to the Top-Level menu screen.

Power On Selftst

Passed

F1 F2 F3

If a failure occurs during the self-test, the LCD displays Power On Selftst Failed for several seconds. The LCD then displays the Top-Level menu screen with the message Power on Fail appearing on the top line of the LCD. Although a failure has occurred, the modem will attempt to operate. This allows you to activate a more thorough self-test using the Test branch. Refer to the Test section in Chapter 3.

Selecting Factory Configuration Options for 392xPlus

After the modem passes the power-up self-test, configure it for operation using one of the six factory preset configurations.

The 392xPlus modems have six factory preset templates that contain the most commonly used configuration options (straps) for Synchronous Leased (Answer or Originate), Asynchronous Leased (Answer or Originate), Trellis Multipoint (Control or Tributary), Asynchronous Dial, Synchronous Dial, and UNIX Dial hardware network configurations. Your modem ships from the factory with the Synchronous Leased (Answer) default configuration options stored in memory. If Synchronous Leased (Originate), Asynchronous Leased (Answer or Originate), Trellis Multipoint (TMp) (Control or Tributary), Async Dial, Sync Dial, or UNIX Dial is more appropriate for your

3920-A2-GN31-30 November 1996 2-11