| 摘要 |
PROBLEM TO BE SOLVED: To allow a telephone set to be used as a wired telephone set and a radio telephone set, and further to operate the telephone set as a wired telephone set regardless of connection destination that is a public network or an extension. SOLUTION: A wired controller 20 and radio channel controllers 40-4M connect respectively with plural exchange main controllers 10-1N connecting with a public network (or leased line network) in the controllers telephone communication control system. Plural telephone sets 50-5L connect with the radio channel controllers 40-4M via radio channels 60-6K. A telephone set 30 connecting with the wired controller 20 has both wire and radio functions, which are implemented as a wired telephone set or a radio telephone set 50 by recognizing itself whether or not it is connected to the wired controller 20. |
