JPS59177278U

JPS59177278U - Three-way trunk circuit

Info

Publication number: JPS59177278U
Application number: JP7118183U
Authority: JP
Inventors: 史郎松岡; 悟日比野
Original assignee: 三洋電機株式会社
Priority date: 1983-05-12
Filing date: 1983-05-12
Publication date: 1984-11-27

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は王者通話トランク回路が付設された電話交換器
のブロック図、第２図は通話装置と本考案王者通話トラ
ンク回路との接続状態を示すブロック図、第３図乃至第
６図及び第１１図は本考案三者通話−トランク回路の各
所に与えられる信号の波形図、第７図はＰＣＭコードの
流れを示す図、第８図は本考案の要部であるコード変換
部の内部構成を示すブロック図、第９図はコード変換テ
ーブルの内部状態を示す図、第１０図は符号発生器のブ
ロック図である。３・・・通話装置、５・・・王者通話トランク回路、６
・・・送信側データハイウェイ、７・・・通話メモリ、
９・・・受信側データハイウェイ、２１・・・コード変
換部、２９・・・比較回路、３１・・・コード変換テー
ブル、３２・・・符号発生器。FIG. 1 is a block diagram of a telephone exchange equipped with a king call trunk circuit, FIG. 2 is a block diagram showing the connection state between a telephone device and the king call trunk circuit of the present invention, and FIGS. 3 to 6 and Figure 11 is a waveform diagram of signals applied to various parts of the three-way call trunk circuit of the present invention, Figure 7 is a diagram showing the flow of PCM codes, and Figure 8 is the internal configuration of the code converter, which is the main part of the present invention. FIG. 9 is a diagram showing the internal state of the code conversion table, and FIG. 10 is a block diagram of the code generator. 3...Telephone device, 5...Champion call trunk circuit, 6
...Sending side data highway, 7...Call memory,
9... Receiving side data highway, 21... Code conversion section, 29... Comparison circuit, 31... Code conversion table, 32... Code generator.

Claims

[Claims for Utility Model Registration] A PCM signal connected to a large number of telephones and having multiplexed code bits sent from the transmitter side of these telephones is input, and the PCM signals of these PCM signals are In a three-way call trunk circuit attached to and used in a digital switch that changes the timing and outputs it and transmits it to the receiver side of the above-mentioned large number of telephones, from the output side of the digital switch. A pickup circuit that picks up PCM codes at predetermined timings, and a code that receives PCM codes from two of these pickup circuits, synthesizes the received PCM codes, and outputs a new PCM code. The code converter is configured by a converter and an output circuit that receives and receives the PCM code output from the code converter and outputs it to the input side of the digital exchanger at a predetermined timing, a comparison circuit that compares the magnitudes of the two PCM codes, and a code generator that uses the comparison output of the comparison circuit and the codes of the two PCM codes as inputs and generates the code of the PCM code to be output. , has an address consisting of a combination of 1-bit information indicating whether the signs of the two PCM codes are the same or different, and bit information indicating the size of the two PCM codes, and corresponding to each address. and a code conversion table that stores the size of the PCM code to be output, and the output from the code generator and the output from the code conversion table are combined as the output of the code conversion unit. Three-way trunk circuit.