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

Troubleshooting C

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

Overview

This appendix points out basic problems that can occur when operating a 3800 Series 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 8, 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 Health
Symptom	Action
Modem did not pass	Contact your service representative.
power-up self-test
Power LED does not	Make sure the modem’s ON/Off switch is in the ON position.
light	Make sure the ac power transformer is connected to the ac power receptacle.
LCD does not display	If Power LED and/or LCD do not operate, contact your service representative.
A problem is suspected	Perform a self-test via the modem’s DCP or type AT&T9 if using AT commands.
after the power-up	Perform a local analog loopback with a Pattern test. If the modem consistently registers errors,
self-test
	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.

3810-A2-GB30-30 September 1998 C-1