senk1s, from the BCM sSales Handbook:
BCM also allows the hot desking of IP sets, which allows one IP set to adopt the configuration of another set on a
BCM system. Once an IP set is programmed for this, all the button programming, line appearances and feature
buttons from the original set appear on the hot desk set and calls appear on this set as they would on the original. This
password-protected feature can be disabled from either set once it is no longer needed. Hot desking of IP sets
supports mobile workers and helps them maintain their productivity while away from their home office.