发明名称 |
DIGITAL KEY TELEPHONE DEVICE |
摘要 |
PURPOSE:To decrease the number of connecting core wire by providing a CODEC to each key telephone device in accordance with the number of stored trunk line of a main device and transmitting both audio signal information and control signal information through a common highway. CONSTITUTION:Plural key telephones TEL1-TELn are connected to a main device 1 in parallel to each other via a common highway. At the same time, the control information on the telephones TEL1-TELn as well as the device 1 are multiplexed in time division. Then CODEC8 and 16 are provided to the device 1 in correspondence to the number of store circuit and to the telephones TEL1- TELn to convert each audio signal into a pulse signal and vice versa respectively. Thus each audio signal information is transmitted into the same time slot as the control signal information through a common high way (b). |
申请公布号 |
JPS5974795(A) |
申请公布日期 |
1984.04.27 |
申请号 |
JP19820183779 |
申请日期 |
1982.10.21 |
申请人 |
TAIKOU DENKI SEISAKUSHO:KK |
发明人 |
SEKI HIDEYUKI;OZAWA CHIHARU |
分类号 |
H04Q3/58;H04M9/00 |
主分类号 |
H04Q3/58 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|