However, because of this solution, the area using 0774-4x in Kumiyama-cho was included in the category of 'areas of 0774-4x and within Uji City,' when all areas using 0774-4x came to be covered by the flat-rate communication service, FLET'S ISDN, started by NTT West.
しかしこの方法はNTT西日本の定額通信サービスフレッツISDN提供開始について、0774-4xが対象エリアとなった際、「0774-4xかつ宇治市内」という区分となった。