JPH02120980U

JPH02120980U -

Info

Publication number: JPH02120980U
Application number: JP2982389U
Authority: JP
Priority date: 1989-03-17
Filing date: 1989-03-17
Publication date: 1990-10-01
Anticipated expiration: 2004-03-17
Also published as: JPH087726Y2

Description

[Brief explanation of drawings]

第１図はこの考案の電源アダプタの構成を説明
する図、第２図はこの考案のデイジタル電話端末
の複数台設置時の配線構造図、第３図はＩインタ
フエースデイジタル電話端末の一般的接続図、第
４図、第５図は従来の端末と複数台設置時の配線
構成図である。図中、１はＤＳＵ、２は給電回路、３はＩイン
タフエースバス接続端子、４，４−１〜４−Ｎ，
２５，２５−１〜２５−Ｎはケーブル、５Ａ，５
Ａ−１〜５Ａ−ＮはＩインタフエースデイジタル
電話端末、６はＩインタフエースバス接続コネク
タ、７は受電回路、８はＡＣ電源回路、１１−１
〜１１−Ｎは電話機ひも、１２−１〜１２−Ｎは
ローゼツト、２０は電源アダプタ、２１−１〜２
１−２は商用電源の入力端子、２２は交流／直流
変換回路、２３，２４は第１、第２の接続端子群
である。 Figure 1 is a diagram explaining the configuration of the power adapter of this invention, Figure 2 is a diagram of the wiring structure when multiple digital telephone terminals of this invention are installed, and Figure 3 is a general connection of I interface digital telephone terminals. 4 and 5 are diagrams of conventional terminals and wiring configurations when multiple terminals are installed. In the figure, 1 is a DSU, 2 is a power supply circuit, 3 is an I interface bus connection terminal, 4, 4-1 to 4-N,
25, 25-1 to 25-N are cables, 5A, 5
A-1 to 5A-N are I interface digital telephone terminals, 6 is an I interface bus connector, 7 is a power receiving circuit, 8 is an AC power supply circuit, 11-1
~11-N is a telephone string, 12-1~12-N are rosettes, 20 is a power adapter, 21-1~2
1-2 is an input terminal of a commercial power supply, 22 is an AC/DC conversion circuit, and 23 and 24 are first and second connection terminal groups.

Claims

[Scope of utility model registration request]

a, b, c, d of the 8-pin connector of a digital communication terminal used by connecting to an ISDN network
A power adapter for a digital telephone terminal that connects the c, d, e, and f terminals among the e, f, g, and h terminals to the I interface bus for communication. an AC/DC conversion circuit that obtains DC power from a power supply, and a first group of connection terminals and a second group of connection terminals for connection to the I interface bus;
, e, f terminals of the first and second connection terminal groups are connected to each other, and the input terminal of the AC/DC conversion circuit is connected to each other. connected to the input terminal of the commercial power supply,
two g,
A power adapter for a digital telephone terminal, characterized in that it is connected to the h terminal or the a, b terminals.