Nippon Telegraph & Telephone is the parent company of a group engaged in the provision of telecommunications services. Co.'s principal services include fixed-line communications including local, long-distance, and overseas calls; internet connection; mobile communications including cellular phone, car phone, pocket pager, and personal handyphone system services; data communications such as system integration, digital network, IP network, and asymmetric digital subscriber line (ADSL); and other services including telephones books publication; telegram; telephones, facsimiles, LAN/WAN related equipment, and internet software sales and leasing; public phone; and dial information services.