Cisco Cisco Computer Telephony Integration Option 8.5 Troubleshooting Guide

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Chapter 2      Resolutions to Common Problems
Incorrect or Unreachable CTI OS Server in Connection Profile
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CTI OS Troubleshooting Guide for Cisco ICM/IPCC Enterprise & Hosted Editions Release 7.1(1)
From the client application machine, open a console window. 
Attempt to ping the configuration machines entered in the registry key 
listed above. If the system is configured correctly, the ping should 
succeed for at least one of the configuration machines listed in the 
registry. 
If the ping succeeded then the problem may be that the CTI OS server is 
not running on either of the configuration machines in the client 
application's registry or the CTI OS server is listening on a port different 
than the client application registry, or the CTI OS server is not active. 
Make sure that all configurations are correct, and then start the CTI OS 
server on those machines and re-start the client application.
If the ping fails for both configuration machines and the configuration 
machine entries in the registry are not TCP addresses, the problem might be 
an inability to resolve the CTI OS server name into an IP address. 
Try to ping the IP addresses corresponding to the configuration machine 
names entered in the registry. 
If the ping succeeds, your DNS server may be down or the "hosts" file on 
the client machine may map the hostname to an incorrect address. 
Replace the configuration machine names in the registry with the 
associated IP addresses and restart the client application.
If pinging the IP address fails then either the IP address is incorrect or the 
network connection between the client application and the configuration 
machine is down. Your TCP/IP network administrator should be able to help 
resolve this issue.
Incorrect or Unreachable CTI OS Server in 
Connection Profile
When a client attempts to login, he/she chooses a connection profile from a list of 
available connection profiles on the login dialog. The client application receives 
the list of connection profiles from the configuration server. The connection 
profile provides the location of the CTI OS servers with which to connect. If this 
information is incorrect or if the specified servers are not reachable, the client 
application will not connect to a CTI OS machine. Since the client application 
gets all information about button enablement from the CTI OS server, this error