Cisco Cisco Computer Telephony Integration OS 8.5 Troubleshooting Guide

If no packets are captured, click stop, then Capture -> Start again. 

 

However, make sure that you select a different Adapter from the drop down list, go to step 3., and 
repeat the test. If there are no adapters listed in the Interface drop down list and you are not an 
Administrator on the PC, there may be a WinPcap user permissions issue. To fix this issue, check 
the value of the Start setting at the following Windows registry key:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\NPF

Change the value of the Start setting to 0x00000002, reboot the PC, and try to monitor the agent again. 

If you are unable to capture packets on any of the adapters listed in the drop down list, and your PC is 
on a VLAN, your PC's network interface card may not be able to capture packets from a different VLAN. 
Some interface cards require special configuration to capture packets off a different VLAN. 

Refer to Appendix A of the CTI OS System Manager's Guide for Cisco ICM/IPCC Enterprise & Hosted 
Editions for details on how to qualify your network interface card for silent monitor.

http://www.winpcap.org/

. The CTI 

OS silent monitor feature requires that you modify a WinPcap registry setting after installing (or 
reinstalling) WinPcap. In the Windows registry go to the following registry key:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\NPF

Change the value of the Start setting under this key from 0x00000003 to 0x00000002. Reboot the PC.