Nortel 1000 Installation And Configuration Manual page 133

Configuring a modem for TM 3.0 applications
COM port error
In this scenario, the modem dials and connects but the error message "Error writing to
COM port" or "Error reading from COM port" is received.
Procedure 28
Resolving COM port error
1
2
a. After establishing a PPP connection, but before canceling the connection
dialog, open a DOS command prompt: From the Start menu select Programs
> MS-DOS Prompt.
b. Run the ping command by typing ping 47.1.1.10 where 47.1.1.10 is the
system's local IP address. See "Adding a system" in Optivity Telephony
Manager: System Administration (553-3001-330) for information about
configuring Ethernet and PPP on the system.
c. Verify that the data lights on the modem flash as the ping data is sent to the
system.
If a response is not received from the system, verify that the IP address is the
same as the one assigned to the local PPP interface on the system. To verify
the IP address, go to the System Properties—Communication, PPP Connection
Type dialog box, and confirm that the IP address that appears in the address
field is correct.
Verify that the modem installed in Control Panel that matches your modem type.
Remove the installed modem driver and install a generic modem driver in its place:
a. From the Start menu, select Settings > Control Panel.
b. Double-click Modems.
c. Click Remove to remove the modem from the installed list.
d. Click Add to add a new modem driver.
e. Select the check box Don't detect my modem; I will select it from a list, and
then click Next.
f. Select the standard modem driver matching your modem's baud rate (for
example, Standard 28 800 bps Modem), and then click Next.
g. Select the COM port to which your modem is connected, and then click Next.
h. Click Finish to complete the modem installation.
i. Restart the system, and try to establish a PPP or serial connection.
CS 1000 Telephony Manager Installation and Configuration
End of Procedure
End of Procedure
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