Cisco Cisco Computer Telephony Integration Option 8.5 Troubleshooting Guide

This section is organized by problem descriptions, and contains troubleshooting steps to diagnose and 
resolve each problem.

This section discusses some common CTI OS Server problems.

Error messages in the CTI OS Server console window indicate that it is unable to establish a 

connection to the CTI Server. 

There are several possible causes, the most common of which are related to TCP/IP 

networking problems. The CTI OS Server console window should display an error message with an 
error description. Some possible causes of this symptom are:

CTI OS Server may not be configured with the proper information as to the location of CTI 
Server. Check the configured CTI Server hosts (SideAHost and SideBHost) and ports 
(SideAPort and SideBPort) in the registry at the following key:

 

If the configuration is correct, CTI OS Server may not be able to identify the host and/or make 
a TCP/IP connection to the CTI Server. Your TCP/IP network administrator should be able to 
help resolve any TCP/IP hostname/routing issues. 

If the TCP/IP "target machine refused connection" error displays in the CTI OS Server console 
window, then you should ensure that the CTI Server is running as expected. Look for its console 
window on the target system, and note the IP port that it is listening on. Check that this is indeed 
the port number configured in the registry for CTI OS, under the key: