Paradyne 392xPLUS Table B-5 Modem Ð VF Connection Symptom Action, Table B-6, Online Operation

Troubleshooting

Table B-5

(2 of 2)

Modem Ð VF Connection

Symptom Action

Intermittent disconnects, high error rates, or excessive retransmissions occur.

Perform an End-to-End test. Refer to Pattern located in the Test Branch section of Chapter 3.

The modem establishes and then disconnects the call.

You may have a poor VF connection. Try dialing again.

The remote modem may have encountered an error control (EC) disconnect. If the modems cannot negotiate EC, then a disconnect occurs.

The remote modem may be in a forced Error Control mode (disconnect if there is no error control). Reconfigure your modem to V.42/MNP or Buffer and try again.

Check the LCD to determine the reason for the disconnect.

Perform a Local Analog Loopback test.

High error rates occur when running a local loopback or self-test.

Incoming rings can cause data errors during a loopback test. Abort the test, disconnect the modular VF cord, and restart the test.

	Table B-6
	Online Operation
Symptom	Action
The data is scrambled.	Verify that the character format (data bits, parity, and stop bits) is set to the
	same value in both modems.
Data is missing during a transfer.	Verify that you are using the same method of flow control for both the modem
	and the DTE.
	If using XON/XOFF flow control, verify that the modem's parity matches the
	DTE's parity.

Table B-7

Mux Operation

Symptom Action

The MUX configuration option does not appear under DTE Interface.

The Dial Access Security feature is enabled. Verify that both the Answer and Originate security options are disabled. Refer to sections Set Answer Sec and Set Orig Sec in Chapter 6.

The Dial Line Rate or LeasedLine Rate configuration option is set to an invalid modulation. Refer to the Dial Line or Leased Line configuration option in the Multiport Mode section of Chapter 4 for the valid rates.

3920-A2-GN31-30 November 1996 B-5