Avaya Site Administration Reference
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Use the manufacturer’s instructions to find out how to diagnose system health. If you are
connecting through a terminal server, then you may have to reset the terminal server
(and not the system you are trying to connect to).
Serial port error
Avaya Site Administration has encountered an error with the serial port on your
computer. Data has been lost due to a serial port performance problem or error.
Increasing COM port reliability
If you are getting persistent tx or rx problems, then you should consider changing your
COM port settings.
From the Tools menu, select the Ports option. Ensure that the COM port has the correct
speed and data settings for the type of peripheral (modem, data module, and so on) or
system you are connecting to. Incorrect speed settings will often cause this error.
Decreasing maximum modem connect speed
Sometimes a modem will connect at a higher speed than your computer is capable of
keeping up with. On most modems you can change the initialization string of your
modem to control the maximum rate that it will connect with. You might consider
dropping modem connection speeds back to 9600bps or less to determine the level at
which problems occur. On a US robotics Sportster modem, the command to set your
modem to a maximum connect speed of 9600bps is AT&N6. Check your modem manual
before setting your maximum connect speed.
Serial port is in use
Another application on your computer is using the serial port you are trying to use.
To resolve the problem, you may want to:
Identify the competing application and close it down.
Connect your modem (or data module) to another serial port (consult your
computer’s manual and your peripheral's manual for details on how to do this).
Then fix the COM Port setting in the Connection Properties screen to reflect the
new port, and (if necessary) configure the new COM Port settings using the Ports
screen. (To access the Ports screen, choose Ports from the Tools menu.)
Reboot your computer.
Some Windows applications do not clean up effectively when they are shut down.
This can make your Windows operating system lock a serial port needlessly until you
reboot your computer. In addition, on some computers, power-saving options (if you
turn them on) can cause serial ports to appear to be in use.
If you are using Windows NT, it may give you a message when it starts (after
rebooting, for example) indicating a conflict with the serial port. Use the Windows
NT online help system to resolve these types of conflict.
If you are using Windows 95 and 98 (not NT), there is a Device Manager in the
Control Panel that may show a conflict with a serial device. To use it, complete the
following steps:
1 From the Windows Start menu, choose Settings->Control Panel.
2 In the Control Panel screen, double-click the System icon.
3 Click the tab called "Device Manager."
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