MSPS Err Msg: Microsoft Call Manager Is Unable to Communicate with the Base Station (248811)

SYMPTOMS

When you start Microsoft Call Manager, you may receive the following error message:

Microsoft Call Manager is unable to communicate with the base station. The serial cable or power cord may be disconnected. Check your connections, then click Retry. To close Call Manager, click Cancel.

CAUSE

This behavior can occur if the drivers for the Microsoft Cordless Phone System are missing from Device Manager.

The following drivers for the Cordless Phone System should be listed in Device Manager.

Branch	Driver
Ports	Microsoft Phone System model MP-900
Modems	Microsoft Voice Only Software Modem
Sound, Video, and Game Controllers	Wave device for Voice Modem

NOTE: The Wave device for Voice Modem driver may also be listed as the Microsoft Voice Only Software Modem Serial Wave Device.

RESOLUTION

To troubleshoot this issue, use the following techniques:

Check the power connection on the base and make sure the LED on the base is lit.
Check the serial (COM) port connection and connect the base to another serial port in the computer (if one is available).
Verify that all of the drivers in the table are listed in Device Manager.

NOTE: If any of these drivers are missing, click Refresh in Device Manager and check to see if they appear.

MORE INFORMATION

To verify that all of the drivers in the table are listed in Device Manager:

Click Start, point to Settings, and then click Control Panel.
Double-click System.
Click the Device Manager tab.
Click the PLUS SIGN (+) next to one of the branches of Device Manager listed in the table. Repeat this step for each branch of Device Manager listed in the table.

If the issue continues to occur, you may need to troubleshoot the serial ports in the computer.