Telecommunication terminal identification on a switching system

A method and apparatus for identification of telephone numbers for IP telephones in offices to be assigned to different persons by (1) assigning one of the offices to one of the persons upon a request from the one of persons; (2) accessing a physical network address for an IP telephone located in the assigned one of the offices; (3) obtaining a telephone number for the one of the persons; (4) determining from the accessed physical network address an IP address of the IP telephone; (5) transmitting a message having the telephone number and IP address to a telecommunication switching system to which the IP telephone is interconnected; and (6) assigning the telephone number to the IP address by the telecommunication switching system in response to the message thereby assigning the telephone number to the IP telephone.