Optimize my Win98 modem communications performance

>>>To verify the modem configuration:

1. Click Start, point to Settings, click Control Panel, and then double-click Modems.

2. Verify that the manufacturer and model for your modem are correct. If not, run the Install New Modem wizard to detect the modem and confirm the current registry
configuration.

If your current modem does not appear in the list of installed modems, click Add, and then select the appropriate modem.

If the manufacturer and model are not correct and are not available from the list, select the Hayes-compatible option for Generic Modem driver (set to the maximum baud
rate supported by your modem), and then click OK.

3. Remove any other modem entries in the list to eliminate conflicts.

>>>To verify that the modem is enabled:

1. Click Start, point to Settings, click Control Panel, double-click System, and then click Device Manager.

2. Select your modem from the list, and then click Properties.

3. Make sure the device is present, please use it, option is selected.

>>>To verify that the port is correct:

1. Click Start, point to Settings, click Control Panel, and then double-click Modems.

2. Select your modem, and then click Properties.

3. Click General, and then verify that the listed port is correct. If it is not, select the correct port, and then click OK.

>>>To determine whether the serial port I/O address and IRQ
settings are correctly defined:

1. Click Start, point to Settings, click Control Panel, and then double-click System.

2. Click Device Manager, and then click Ports.

3. Select a specific port, and then click Properties.

4. Click Resources to display the current resource settings for that port. To find the correct settings, consult your modem documentation.

5. In the Resources dialog box, check the Conflicting devices list to determine whether the modem is using resources in conflict with other devices.

6. If the modem is in conflict with other devices, click Change Settings, and then click a configuration that does not have resource conflicts.

NOTE: Do not use a modem on COM3 if there is a serial mouse or other device on COM1. Usually, COM1 and COM3 ports use the same IRQ and cannot be used simultaneously on most computers. The same is true of the COM2 and COM4
ports. If possible, change the COM3 and COM4 port to an IRQ setting that is not in conflict.

Also, some display adapters have an address conflict with COM4 ports. To work around this conflict, use another COM port or replace your graphics adapters.

>>>To check the port settings:

1. Click Start, point to Settings, click Control Panel, double-click Modems, click a modem, and then click Properties.

2. Click Connection to check the current port settings such as baud rate, data bits, stop bits, and parity.

3. Click Advanced to check error control and flow control. If you are using Windows 16-bit-based programs, turn off these advanced features.

4. Verify the UART type.

Data transmission problems may occur if your computer is performing other tasks during a file download. If problems or errors occur during transmission, try lowering the baud rate. Attempts to use baud rates greater than 9600 on computers equipped with 8250 or 16450 UARTs will probably result in dropped characters.

>>>To check the modem baud rate:

1. Click Start, point to Settings, click Control Panel, and then double-click Modems.

2. Select the modem, and then click Properties.

3. Click General, and then set the baud rate to the correct speed. Slower modem speeds may work, especially if you're using an older computer.

5. Click Only connect at this speed if it is not already selected.

NOTE: If the host system you are calling cannot communicate at the initial baud rate, it may be able to communicate at a slower baud rate.

TIP: To optimize communications performance, set the baud rate to a higher speed.

>>>To disable hardware flow control if your modem cable doesn't support it:

1. In Control Panel, double-click Modems.

2. Select the modem, and then click Properties.

3. Click Connections, and then click Advanced.

4. Make sure the Use flow control option is not selected.
 

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