JPH0221949U

JPH0221949U -

Info

Publication number: JPH0221949U
Application number: JP10088488U
Authority: JP
Priority date: 1988-07-28
Filing date: 1988-07-28
Publication date: 1990-02-14

Description

[Brief explanation of the drawing]

第１図は本考案に係る電話回線試験器の構成を
示すブロツク線図と、電話回線に対する接続状態
を示す回路図、第２図は電話回線試験器の外観を
示す正面図である。１……線路電圧、極性検出回路、２……ダイヤ
ルパルス信号検出回路、３……ＤＴＭＦ信号検出
回路、４……中央制御回路（ＣＰＵ）、５……表
示器（ＬＣＤ）、６……ＲＯＭ、７……ＲＡＭ、
８……Ｉ／Ｏ回路、９……表示桁数設定スイツチ
、１０……電話回線試験器、１１……路線端子、
１２……操作キー、１３……電源スイツチ、１４
……電話回線、１５……端末機器、１６……ロー
ゼツト、１７……接続コード。 FIG. 1 is a block diagram showing the configuration of the telephone line tester according to the present invention, and a circuit diagram showing the state of connection to the telephone line, and FIG. 2 is a front view showing the external appearance of the telephone line tester. 1... Line voltage, polarity detection circuit, 2... Dial pulse signal detection circuit, 3... DTMF signal detection circuit, 4... Central control circuit (CPU), 5... Display (LCD), 6... ROM , 7...RAM,
8...I/O circuit, 9...Display digit number setting switch, 10...Telephone line tester, 11...Line terminal,
12...Operation key, 13...Power switch, 14
... Telephone line, 15 ... Terminal equipment, 16 ... Rosette, 17 ... Connection cord.

Claims

[Claims for Utility Model Registration] Input signal detection circuit that detects line voltage and polarity;
An input signal detection circuit that includes an input signal detection circuit that detects a dial pulse signal and an input signal detection circuit that detects a DTMF signal, each of which is connected to a line terminal connected to a telephone line to be detected, and each of the above input signal detection circuits. Input the detection signal,
A central control circuit that performs arithmetic and sequence processing according to a preset measurement program; A display or notification means that displays the results processed by the central control circuit; and a display or notification means that sequentially displays the contents displayed on the display or notification means. It consists of a rewritable storage means that stores and displays the stored contents on a display at any time by inputting instructions from operation keys connected via an I/O circuit, and connects terminal equipment such as a telephone. 1. A telephone line tester, which is connected to a telephone line that is connected to a telephone line, and detects and displays the status of the telephone line, such as line voltage, polarity, monitoring signal, dial signal, etc.