Compaq M300 15-18Troubleshooting, Modem does not connect Not connect at highest speed, Telephone

15-18Troubleshooting

Solving Modem Problems Continued

Modem does not connect.

Modem does

not connect at highest speed.

The error correction feature of your modem software is interfering.

Line conditions in your area or in the area you are calling may not support the highest connect speeds.

Another device on your telephone line may be causing interference.

The telephone

line does not support 56K implementation.

There is noise on the telephone line.

The 56K protocol of an internal modem will fall back to lower speeds if the telephone line is too noisy for a high-speed connection.

Disable error correction (&K0) and data

compression (&M0) using AT

commands.

NOTE: To access AT commands and instructions for using them, select Start⊕Compaq Information Center⊕Modem Commands.

Have your telephone line checked by

your local telephone service provider.

Try dialing an alternate telephone

number for the service you are using.

Hang up an extension telephone and

disconnect any other devices that may

be using the same telephone line, then

redial.

The 56K protocol requires that the

telephone line contain no more than

one analog-to-digital conversion.

Try connecting from an alternate site.

Use another telephone line.

Change the Hang-up Delay S Register:

At the command line in terminal mode,

type ATS10=150, then press Enter.

NOTE: This command causes the modem to take longer to disconnect even if there is no noise on the line.

Continued