Ensure that the ToS/QoS is properly configured on the system where CTI OS Server resides. Make sure that the following registry has ToS value set to 0x68:
HKEY_LOCAL_MACHINE\SOFTWARE\Cisco Systems, Inc.\CTIOS\CTIOS_<InstanceName>\ctios1\Server\Connection
Also make sure that the following system registry value “DisableUserTOSSetting” is set to 0. It can be found under:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\TcpIp\Parameters
 | Note: | The system needs to be restarted if the “DisableUserTOSSetting” registry value has been changed. |
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