Cisco Interactive Experience Client 4600 Series User Manual page 223

Appendix F Video Conferencing Using the Session Initiation Protocol Client
Finding The IP Phone's MAC Address
The Cisco Unified IP phone 9951 has a MAC address, which can be found by one of two methods.
First Method
There is a label on the bottom of the phone that contains the MAC address.
Figure F-20
Second Method
Step 1 Press the System Settings button.
Figure F-21
MAC Address Label
System Settings Button on the Cisco Unified IP Phone 9951
Cisco Interactive Experience Client 4600 Series User Guide
Cisco IP Phone Set Up on the CUCM
F-25