| 摘要 |
PROBLEM TO BE SOLVED: To provide the telephone set calling system in which a caller telephone set allows pluralities of telephone sets to receive an incoming call simultaneously. SOLUTION: A telephone set 21 and telephone sets 22, 23, 24 belonging to a call group 31 are registered and connected to an exchange 11. The telephone sets 22, 23 are set to a delivery capability class of the telephone set 21 and a delivery capability class where connection is not restricted. When the telephone set 21 dials a group number of the call group 31, incoming call processing is applied simultaneously to the telephone sets 22, 23 which are set to a delivery capability class of the telephone set 21 and a delivery capability class where connection is not restricted, an incoming call from the telephone set 21 is received simultaneously by the telephone sets 22, 23 via the exchange 11 and the information is communicated among pluralities of the telephone sets 21, 22, 23 efficiently. |
