JPH0362762A - Extension communication system and communication terminal equipment - Google Patents

Extension communication system and communication terminal equipment

Info

Publication number
JPH0362762A
JPH0362762A JP1198980A JP19898089A JPH0362762A JP H0362762 A JPH0362762 A JP H0362762A JP 1198980 A JP1198980 A JP 1198980A JP 19898089 A JP19898089 A JP 19898089A JP H0362762 A JPH0362762 A JP H0362762A
Authority
JP
Japan
Prior art keywords
communication
extension
terminal
line
channel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP1198980A
Other languages
Japanese (ja)
Other versions
JPH0779376B2 (en
Inventor
Toshihiko Yasui
利彦 安井
Kenji Shioyama
塩山 健司
Hiroyuki Aii
相井 宏之
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP1198980A priority Critical patent/JPH0779376B2/en
Publication of JPH0362762A publication Critical patent/JPH0362762A/en
Publication of JPH0779376B2 publication Critical patent/JPH0779376B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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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) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【発明の詳細な説明】 産業上の利用分野 本発明L;LISDN回線に接続する同一バス上の端末
間の内線通信方式およびこの通信方式に用いる通信端末
に関するものである。
DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention L relates to an extension communication system between terminals on the same bus connected to a LISDN line and a communication terminal used in this communication system.

従来の技術 l5DNの基本インタフェースでii  64kbps
のBチャネル2本と、16kbpsのDチャネル1本に
より通信が行なわれている。従来の回線制御用信号チャ
ネルとしてはDチャネルが用いらN  LAPDと呼ば
れる通信プロトコルに基づいて通信が行われている。通
信フレーム(よ サービスアクセス点識別子(SAPI
)、公衆網側から各端末を識別するため端末毎に割りイ
ボけられた端末#端識別子(TE丁)およびフレームが
コマンドかレスボンスかを識別するためのC/Rビット
で構成されるアドレス部を持っている。回線接続時には
 呼制御用5API値である O′および自端末のTE
I値を送信フレームのアドレスとすることで、公衆網を
経由した通信を行なっている。また 端末側はC/Rビ
ットをO′ として公衆網側に対してコマンドを送出し
 ′1° としてレスポンスを送出する。構内端末の接
続形態として、複数の端末が1つのパッシブ・バスに接
続される場合がある。同じバスに接続された複数の端末
(よ Dチャネルの折り返しとして回線終端装置より戻
ってくるエコー・ビットを監視することで、Dチャネル
通信の有無を識別する。ただし 監視を行なうのみでエ
コー・ビットを情報信号として取り込むことはしな(℃ 発明が解決しようとする課題 しかしながら、前述のような回線制御方式および通信端
末で(よ 同一バスに接続された別の端末から送出され
たDチャネルのデータを直接取り込むことは不可能であ
る。したがって、同一バス上の端末間での通信(内線通
信)を行なうために(よPBX等の構内交換機を利用す
る力\ 公衆網上の交換機能を用いた公衆網経由の方法
しか取れなかった 本発明は 上記の問題点に鑑みてな
されたもので、交換機を利用せずに同一バス上の端末間
の通信を行なうことができる内線通信方式および内線通
信機能を有する通信端末を提供することを目的とする。
II 64kbps with the basic interface of conventional technology 15DN
Communication is carried out using two B channels of 16 kbps and one D channel of 16 kbps. A D channel is used as a conventional line control signal channel, and communication is performed based on a communication protocol called NLAPD. Communication frame (Yo Service Access Point Identifier (SAPI)
), an address part consisting of a terminal terminal identifier (TE) assigned to each terminal to identify each terminal from the public network side, and a C/R bit to identify whether the frame is a command or a response. have. When a line is connected, the 5 API value for call control is O' and the TE of the own terminal.
Communication via the public network is performed by using the I value as the address of the transmitted frame. Also, the terminal side sets the C/R bit to O' and sends a command to the public network side, and sends a response with the C/R bit set to '1°. As a connection form of on-premises terminals, a plurality of terminals may be connected to one passive bus. If multiple terminals are connected to the same bus, the presence or absence of D-channel communication can be identified by monitoring the echo bits returned from the line termination equipment as loopbacks of the D-channel. Problems to be Solved by the Invention However, with the line control system and communication terminal described above, it is impossible to capture D channel data sent from another terminal connected to the same bus. Therefore, in order to communicate between terminals on the same bus (extension communication), it is possible to use a private branch exchange such as a PBX. The present invention was made in view of the above problems, and includes an extension communication system and an extension communication function that allow communication between terminals on the same bus without using a switch. The purpose of the present invention is to provide a communication terminal having the following functions.

課題を解決するための手段 本発明(よ 上記の問題点を解決するた△ l5DN回
線に接続された1つのバス上につながれた端末間におい
て、内線通信用SAP Iの値を新しく規定し 各端末
に内線通信用TEIを設定して、前記内線通信用5AP
I値および前記内線通信用TEI値を回線制御信号フレ
ームのアドレスにすることで、Dチャネルを用いた同一
バス上の端末間内線通信を行なう内線通信方式である。
Means for Solving the Problems In order to solve the above problems, the present invention defines a new value for SAP I for extension communication between terminals connected on one bus connected to an 15DN line. Set the TEI for extension communication to 5AP for extension communication.
This is an extension communication system in which extension communication is performed between terminals on the same bus using the D channel by using the I value and the TEI value for extension communication as the address of a line control signal frame.

また本発明(よ 通信情報の入出力制御を行なう通信制
御手段と、回線制御信号として受信するチャネルを外線
通信時はDチャネルを用L\ 内線通信時はエコー・ビ
ットを用いる様に切り換える外・内線切り換え手段と、
外・内線の指定を行なし\ 前記通信制御手段に通知す
る外・内線指定手段と、エコー・ビットを監視し 前記
内線通信用SAP I値と自端末の前記内線通信用TE
I値をアドレスに持つフレームを受信したとき前記外・
内線切り換え手段に通知するエコー・ビット監視手段を
備えた通信端末である。
The present invention also includes a communication control means for controlling the input/output of communication information, and a channel for receiving line control signals that is switched to use the D channel for outside line communication and to use the echo bit for extension line communication. an extension switching means;
No external/extension designation \ An external/extension designation means that notifies the communication control means, monitors the echo bit, and uses the SAP I value for internal communication and the TE for internal communication of the own terminal.
When a frame with an I value as an address is received,
The communication terminal is equipped with echo bit monitoring means for notifying extension switching means.

イ乍用 本発明は上述した構成による通信端末において、回線制
御信号フレームのアドレスに内線通信用5API値を用
いることによって内線通信であることを同一バス上の端
末に通知し 各端末毎に内線通信用TEI値を持たせる
ことで同一バス上の任意の端末の指定が可能となる。ま
f、  Dチャネルで情報を送信しエコー・ビットで情
報を受信するのを可能にすることにより、同一バス上の
任意の端末同士のDヂャネル内線通信を行なうことが可
能となる。
In the communication terminal configured as described above, the present invention uses the 5 API value for extension communication in the address of the line control signal frame to notify the terminals on the same bus that it is an extension communication, and each terminal communicates the extension. By having a specific TEI value, it becomes possible to specify any terminal on the same bus. By making it possible to transmit information on the D channel and receive information on the echo bits, it becomes possible to perform D channel extension communications between any terminals on the same bus.

実施例 以下に本発明の実施例を図面を参照して説明する。第1
図(よ 本発明の実施例における内線通信機能付き通信
端末のブロック図を示すものである。
Embodiments Below, embodiments of the present invention will be described with reference to the drawings. 1st
FIG. 1 shows a block diagram of a communication terminal with an extension communication function in an embodiment of the present invention.

第1図において、 lはl5DN回線につながる通信端
末、11は通信情報の管理を行なう情報管理能12は通
信情報の人出力制御を行なう通信制御部、13は回線制
御信号としての入力チャネルを、外線通信か内線通信か
によって、Dチャネルとエコー・ビットとの切り換えを
行なう外・内線切り換えR,14は内線通信を行なうか
外線通信を行なうかを指定する外・内線指定訊15はエ
コー・ビットを監視し 内線通信用5API値および自
端末の内線通信用TEI値をアドレスに持つフレームの
識別を行なうエコー・ビット監視部である。また第2図
(よ 本発明の実施例における内線通信方式での情報伝
送の概念図を示すものである。第2図において、21お
よび22は同一パッシブ・バスに接続された通信端末で
あり、第1図の通信端末1と同等のものである。23は
回線終端装置である。以」二のように構成されたこの実
施例の通信端末を用いた内線通信方式について、以下に
その動作を説明する。まf、  l5DN標準としてま
た規定されていないSAP I値(例え+z’s’)を
内線通信用5API値として規定し 同一バス上の端末
にそれぞれ内線用TEI値(例え(よ 通信端末21に
は′1′、通信端末22には“2′)を設定しておく。
In FIG. 1, 1 is a communication terminal connected to the 15DN line, 11 is an information management function that manages communication information, 12 is a communication control unit that controls human output of communication information, and 13 is an input channel as a line control signal. External/internal line switch R, which switches between the D channel and the echo bit depending on external line communication or internal line communication, 14 specifies whether internal line communication or external line communication is to be performed. External/internal line designator 15 is the echo bit. This is an echo bit monitoring unit that monitors the 5 API value for extension communication and identifies frames whose addresses include the TEI value for extension communication of the own terminal. In addition, FIG. 2 shows a conceptual diagram of information transmission using an extension communication method in an embodiment of the present invention. In FIG. 2, 21 and 22 are communication terminals connected to the same passive bus, It is equivalent to the communication terminal 1 in Fig. 1. 23 is a line termination device. The operation of the extension communication system using the communication terminal of this embodiment configured as described above will be described below. Let me explain. Let's define the SAP I value (e.g. +z's') which is not specified in the 15DN standard as the 5API value for extension communication, and set each terminal on the same bus to the extension TEI value (e.g. +z's'). 21 is set to '1', and communication terminal 22 is set to '2').

通信端末21において、外・内線指定部14により内線
通信を指定すると、内線通信を行なうことを通信制御部
12に通知する。通信制御部12で(よ外・内線指定部
14より内線通信の通知を受けると回線制御のために送
信するDチャネルのフレームのアドレスを内線通信用S
 A、 P I値゛8′ 送信先通信端末22の内線通
信用TEI値゛2′およびC/Rビット O′によって
構成する。通信端末21より送信されたDチャネル信号
(よ パッシブ・バス上を通って回線終端装置23に至
り、エコー・ビットに転送されてパッシブ・バス上を戻
る。通信端末22において、エコー・ビット監視部15
では受信したエコー・ビットを監視し アドレスに内線
通信用5API値゛8″、自端末の内線通信用TEI値
′2″およびC/Rビット O′を有するフレームを認
識すると、内線通信のコマンド受信であることを外・内
線切り換え部13に通知する。
In the communication terminal 21, when extension communication is designated by the outside/extension designation unit 14, the communication control unit 12 is notified that extension communication will be performed. When the communication control unit 12 receives notification of extension communication from the outside/extension designation unit 14, it sets the address of the D channel frame to be transmitted for line control to the S for extension communication.
A, PI value '8' Consists of TEI value '2' for extension communication of destination communication terminal 22 and C/R bit O'. The D channel signal transmitted from the communication terminal 21 (passes on the passive bus to the line termination device 23, is transferred to the echo bit, and returns on the passive bus. In the communication terminal 22, the echo bit monitoring section 15
Then, it monitors the received echo bit, and when it recognizes a frame with the 5 API value for extension communication ``8'', the TEI value for extension communication of its own terminal ``2'', and the C/R bit O' in the address, it receives a command for extension communication. This is notified to the external/extension switching unit 13.

外・内線切り換え部13ではエコー・ビット監視部15
より内線通信受信の通知を受けるとDチャネルの代わり
にエコー・ビットを通信制御部12に伝送する。通信制
御部12では内線通信用SAP I値゛8′を持つフレ
ームを受信すると、Dチャネルのフレームのアドレスを
内線通信用SAP I値′8′、自端末の内線通信用T
EI値゛2°およびC/Rビット ′l°で構JiiL
  レスポンスとして回線制御信号を送信する。以降の
呼制御手順(よ ■SDNの回線プロトコルであるLA
PDをそのまま用いて行なう。通信端末21と通信端末
22との間で呼が設定された後(よ 情報管理部11か
らの情報を通信制御部12よりDチャネルを用いて送信
しエコー・ビットを用いて受信して通信制御部12より
情報管理部11へ受信情報を通知する。以上のようにこ
の実施例によれば 内線通信用5API値”8′および
内線通信用TEI値を回線制御信号のアドレスとして用
L\ コマンドフレーム送信時にはC/RビットをO′
 にし レスポンスフしノーム送信時にはC/Rビット
を′I′にすることによって、同一パッシブ・バスにつ
ながった端末間において内線通信であることを通知し 
内線通信を行なうことを可能にする。また 内線通信時
は受信チャネルにエコー・ビットを用いるように切り換
えることができる手段を通信端末に持たせることによっ
て、端末の外部に特別に回線交換機器を設けることなく
同一バスにつなかった端末間での通信を行なうことが可
能になる。
In the external/extension switching unit 13, an echo/bit monitoring unit 15
When receiving a notification that an extension communication has been received, an echo bit is transmitted to the communication control section 12 instead of the D channel. When the communication control unit 12 receives a frame with the SAP I value '8' for extension communication, it sets the frame address of the D channel to the SAP I value '8' for extension communication and the T for extension communication of its own terminal.
EI value ゛2° and C/R bit `l°
A line control signal is sent as a response. Subsequent call control procedures (LA, which is an SDN line protocol)
This is done using PD as is. After a call is set up between the communication terminal 21 and the communication terminal 22, information from the information management unit 11 is transmitted from the communication control unit 12 using the D channel and received using the echo bit to control the communication. The received information is notified from the section 12 to the information management section 11.As described above, according to this embodiment, the L\ command frame is used using the extension communication 5 API value "8'" and the extension communication TEI value as the address of the line control signal. When transmitting, set the C/R bit to O'
By setting the C/R bit to 'I' when sending a response norm, it is notified that it is an extension communication between terminals connected to the same passive bus.
Enables extension communication. In addition, by equipping communication terminals with a means to switch to using echo bits as the reception channel during internal communication, terminals connected to the same bus can be connected to each other without the need for special circuit switching equipment external to the terminals. It becomes possible to communicate with

発明の効果 以」二の説明から明らかなように 本発明(よ ■S 
D N回線に接続された1つのバス」二につながれた端
末間において、内線通信用SAP I値を新しく規定し
 各端末に内線通信用]”EI値を設定して、iイ」配
向線通信用SAP I値および前記内線通信用TEI値
を回線制御(2号フレームのアドレスにすることで回線
制御を行なう方式をとることで、−Q、− 従来のl5DN通信プロトコルであるLAPDをアドレ
ス部のみの変更だけで、内線通信であることを同一バス
上の端末に通知し 送信先端末の指定が可能となる。ま
た 通信情報の人出力制御を行なう通信制御手段と、回
線制御信号として受信するチャネルを外線通信時はDチ
ャネルを用1.\内線通信時はエコー・ビットを用いる
様に切り換える外・内線切り換え手段と、外・内線の指
定を行なし\ 前記通信制御手段に通知する外・内線指
定手段と、エコー・ビットを監視し 前記内線通信用5
API値と自端末の前記内線通信用TEI値をアドレス
に持つフレームを受信したとき前記外・内線切り換え手
段に通知するエコー・ビット監視手段をI S D N
回線に接続される通信端末に備えることによって、Dチ
ャネルで情報を送信しエコー・ビットで情報を受信する
ことが可能になり、同一バス上の任意の端末同士のDチ
ャネル内線通信を行なうことが可能になるという効果を
有するものである。
As is clear from the explanation in Section 2, "Effects of the Invention"
A new SAP I value for extension communication is specified between terminals connected to one bus connected to a D N line, and an EI value for extension communication is set for each terminal, and the iI direction line communication is performed. By adopting a method in which the line control is performed by using the SAP I value and the TEI value for extension communication as the address of the No. 2 frame, - By simply changing , it is possible to notify terminals on the same bus that it is an extension communication and specify the destination terminal.In addition, communication control means that controls the output of communication information and the channel that receives it as a line control signal. 1. External/internal line switching means that switches to use the echo bit during external line communication, and external/internal line switching means that does not specify the external/internal line.\ External/internal line that notifies the communication control means. Specifying means and monitoring the echo bit 5 for the extension communication
An echo bit monitoring means that notifies the outside/extension switching means when a frame having an API value and the TEI value for extension communication of the own terminal as an address is received.
By equipping the communication terminals connected to the line, it becomes possible to send information on the D channel and receive information on the echo bit, and it is possible to perform D channel extension communication between any terminals on the same bus. This has the effect of making it possible.

0−0-

【図面の簡単な説明】[Brief explanation of drawings]

第1図(戴 本発明の実施例における内線通信機能付き
通信端末のブロックは 第2図は 本発明の実施例にお
ける内線通信方式での情報伝送を示すための概念図であ
る。
FIG. 1 is a block diagram of a communication terminal with an extension communication function in an embodiment of the present invention. FIG. 2 is a conceptual diagram showing information transmission using an extension communication system in an embodiment of the present invention.

Claims (2)

【特許請求の範囲】[Claims] (1)ISDN回線に接続された1つのバス上につなが
れている端末間において、内線通信用サービスアクセス
点識別子の値を新しく規定し、各端末に内線通信用の端
末終端識別子値を設定して、前記内線通信用サービスア
クセス点識別子値および前記内線通信用端末終端識別子
値を回線制御信号フレームのアドレスにすることでDチ
ャネルを用いた同一バス上の端末間内線通信を行なう内
線通信方式。
(1) A new service access point identifier value for extension communication is defined between terminals connected on one bus connected to an ISDN line, and a terminal termination identifier value for extension communication is set for each terminal. , an extension communication system in which extension communication is performed between terminals on the same bus using a D channel by using the service access point identifier value for extension communication and the terminal termination identifier value for extension communication as an address of a line control signal frame.
(2)通信情報の入出力制御を行なう通信制御手段と、
回線制御信号として受信するチャネルを外線通信時はD
チャネルを用い、内線通信時はエコー・ビットを用いる
様に切り換える外・内線切り換え手段と、外・内線の指
定を行ない、前記通信制御手段に通知する外・内線指定
手段と、エコー・ビットを監視し、内線通信用サービス
アクセス点識別子値と自端末の内線通信用端末終端識別
子値をアドレスに持つフレームを受信したとき前記外・
内線切り換え手段に通知するエコー・ビット監視手段を
備えたことを特徴とする請求項1記載の内線通信方式に
おける通信端末。
(2) communication control means for controlling input and output of communication information;
The channel to receive as a line control signal is D during outside line communication.
External/internal line switching means for switching to use the echo bit during internal communication using the channel; external/internal line specifying means for specifying external/internal line and notifying the communication control means; and monitoring the echo bit. However, when a frame with the service access point identifier value for extension communication and the terminal termination identifier value for extension communication of the own terminal is received in the address,
2. The communication terminal according to claim 1, further comprising echo bit monitoring means for notifying the extension switching means.
JP1198980A 1989-07-31 1989-07-31 Communication terminal Expired - Fee Related JPH0779376B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1198980A JPH0779376B2 (en) 1989-07-31 1989-07-31 Communication terminal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1198980A JPH0779376B2 (en) 1989-07-31 1989-07-31 Communication terminal

Publications (2)

Publication Number Publication Date
JPH0362762A true JPH0362762A (en) 1991-03-18
JPH0779376B2 JPH0779376B2 (en) 1995-08-23

Family

ID=16400120

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1198980A Expired - Fee Related JPH0779376B2 (en) 1989-07-31 1989-07-31 Communication terminal

Country Status (1)

Country Link
JP (1) JPH0779376B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0563773A (en) * 1991-08-30 1993-03-12 Tamura Electric Works Ltd Isdn telephone system
DE19855988A1 (en) * 1998-12-04 2000-06-15 Deutsche Telekom Ag Cost effective on-line access to a network using telephone network

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01317051A (en) * 1988-06-17 1989-12-21 Nec Corp Isdn basic access subscriber terminal equipment

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01317051A (en) * 1988-06-17 1989-12-21 Nec Corp Isdn basic access subscriber terminal equipment

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0563773A (en) * 1991-08-30 1993-03-12 Tamura Electric Works Ltd Isdn telephone system
DE19855988A1 (en) * 1998-12-04 2000-06-15 Deutsche Telekom Ag Cost effective on-line access to a network using telephone network
DE19855988B4 (en) * 1998-12-04 2007-12-27 Deutsche Telekom Ag Low-cost online access

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