Hi,
Are you trying to use video? If that's the case, refer to the note below:
"On 64-bit editions of Windows 7, you cannot use video when you have Cisco Unified Personal Communicator set to use your desk phone for phone calls"
http://www.cisco.com/en/US/docs/voice_ip_comm/cupc/8_0/english/release/notes/cupc80.html
Regards,
Tere.
Regards,
Tere.
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