Paradyne 3800PLUS manual Troubleshooting C, Table C-1, Modem Integrity, Symptom, Action, Overview

Troubleshooting C

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-1

Overview

Appendix B points out basic problems that can occur when operating a 3800Plus modem. Use Tables C-1 through C-6 to check out these problems. If you are having data communication difficulties, such as periodic

character loss, random errors, or constant format errors, use the loopback tests described in Chapter 7, Test Branch. With these tests you can usually isolate the fault in your system by using the process of elimination. If problems continue to occur, contact your service representative.

	Table C-1
	Modem Integrity
Symptom	Action
Modem did not pass power-up self-test	Contact your service representative.
Power LED does not light	Make sure the modem's ON/Off switch is in the ON position.
LCD does not display	Make sure the ac power transformer is connected to the ac power receptacle.
	If Power LED and/or LCD do not operate, contact your service representative.
A problem is suspected after the	Perform a self-test via the modem's DCP or type AT&T9 if using AT
power-up self-test	commands.
	Perform a local analog loopback with a Pattern test. If the modem consistently
	registers errors, contact your service representative.
	If the modem passes the above tests and a problem still exists, then the
	problem is likely not with your modem.

3980-A2-GB30-20 November 1996 C-1