Lets you transfer your incoming calls to any telephone that you can dial direct WordNet 3.0 & Open English WordNet

Call forwarding, or call diversion, is a telephony feature of all telephone switching systems which redirects a telephone call to another destination, which may be, for example, a mobile or another telephone number where the desired called party is available. Wikipedia

A telephony feature that allows calls to one phone number to be forwarded to another number Wikipedia Disambiguation

Ability of the telephone network to redirect an incoming call from one number to another Wikidata