JPH0157846U

JPH0157846U -

Info

Publication number: JPH0157846U
Application number: JP15277787U
Authority: JP
Priority date: 1987-10-07
Filing date: 1987-10-07
Publication date: 1989-04-11

Description

[Brief explanation of the drawing]

図面は本考案の一実施例を示すブロツク図であ
る。１は発信電話機、２は着信電話機、３は交換局
、４は局線、５は１６Ｈｚ識別ユニツト、６は４
００Ｈｚ識別ユニツト、７はデータ処理回路、８
は表示ユニツト、９はクロツク線である。 The drawing is a block diagram showing an embodiment of the present invention. 1 is the originating telephone, 2 is the receiving telephone, 3 is the exchange, 4 is the central office line, 5 is the 16Hz identification unit, 6 is the 4
00Hz identification unit, 7 is a data processing circuit, 8
9 is a display unit, and 9 is a clock line.

Claims

[Scope of utility model registration request]

A 16Hz identification unit 5 and a 400Hz identification unit 6 which are branch-connected to the central office line 4 of the calling telephone 1 and are sent from the switching center 3 to the calling telephone 1 to identify the signal sound indicating the status of connection operation, and an input/output interface. 71, a data processing circuit 7 for processing the data of the output of the identification unit including a bidirectional buffer 72, a fixed storage unit 73, a random access memory unit 74 and a central processing unit 77; and a display unit 8 that displays the results of the identification in text, and the intermittent time of the frequency identification output signal identified by both identification units by a data processing circuit that operates under the control of the operation procedure memory of the fixed storage unit written in advance. An identification display circuit for a station line signal tone, which is characterized by detecting the length of the signal tone and displaying characters of the signal tone.