| 摘要 |
PURPOSE:To surely receive a talking content from a caller by recording a message from the caller and repeating the call for a slave set when no reply is received to a call to the slave set. CONSTITUTION:When a call comes from a caller, a master set makes a call of the arrival to a slave set and when no reply comes from the slave set, the master set sends a reply message to the caller, and when a message from the caller comes, the content is recorded and the master set makes a call to the slave set. In the case of making the call to the slave set, it is implemented, e.g. for an interval of 2 minutes, and when a reply comes from the slave set, the master set sends the message from the caller to the slave set. When the slave set moves to an area for communication availability from a communication disable area with the master set, the master set makes a call to the slave set and the message from the caller is surely heard through the operation of an extension button of the slave set, then immediate contact to the caller from the slave set is taken when the recording message requires urgency. |
