Cisco IP Phone 7800 Series User Guide
https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cuipph/7800-series/english/user-guide/PA2D_BK_I89BE38F_00_ip_phone-7800-series-user-guide/PA2D_BK_I89BE38F_00_ip_phone-7800-series-user-guide_chapter_00.html
WEBYou can use Cisco Extension Mobility to sign in to a different phone in your network and have it act the same as your phone. After you sign in, the phone adopts your user profile, including your phone lines, features, established services, and web-based settings.
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