JPS6215958A - Dtmf signal transmission equipment - Google Patents

Dtmf signal transmission equipment

Info

Publication number
JPS6215958A
JPS6215958A JP15465985A JP15465985A JPS6215958A JP S6215958 A JPS6215958 A JP S6215958A JP 15465985 A JP15465985 A JP 15465985A JP 15465985 A JP15465985 A JP 15465985A JP S6215958 A JPS6215958 A JP S6215958A
Authority
JP
Japan
Prior art keywords
signal
dtmf signal
dtmf
dsp
circuit
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.)
Pending
Application number
JP15465985A
Other languages
Japanese (ja)
Inventor
Masahiro Mitsuzuka
正博 三塚
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 JP15465985A priority Critical patent/JPS6215958A/en
Publication of JPS6215958A publication Critical patent/JPS6215958A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To set variably a sound volume level by using a DTMF signal production circuit (DSP) to generate a DTMF signal. CONSTITUTION:When a high/low group frequency signal (monotone) is outputted from a sound source 25 of a DTMF signal to the DSP 28 in time division multiplex mode, the DSP 28 receives control information (kinds of selection signal to be sent, sound volume level and sending timing or the like) from a call processing control circuit 23, selects the component of an instructed selection signal,calculates the level based on the sound volume level in the control information and synthesizes it to the DTMF signal. The signal generated in the DSP 28 is subjected to timing conversion by the information from a call processing control circuit 23, sent to a trunk line interface circuit 26 through a PCM highway, where PCM inversion is applied and the signal is reproduced into an analog signal and sent.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は、構内用の電子交換機、ボタン電話装置等にお
いて、DTMF信号を局線又は、専用線へ送出するため
のDTMF信号送出装置に関するものである。
DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a DTMF signal transmitting device for transmitting a DTMF signal to a central office line or private line in a private electronic exchange, key telephone device, etc. .

従来の技術 第3図は従来のDTMF信号送出装置の構成を示してい
る。すなわち、この場合は内線電話機としてダイヤル式
の電話機を使用し、この電話機より、局線(PB回線)
に対して選択信号を送出して通話を行う時の個々の回路
の結合、信号の送受関係を示している。内線電話機11
より発せられたダイヤル信号は、内線インタフェース回
路12において、受信、計数、数字コード変換され、呼
処理制御回路13に通達される。呼処理制御回路13で
は、このダイヤル信号が局線17に対しての選択信号で
あると判断すると、局線インタフェース回路12に対し
て、“発呼”指示を行うとともに、時分割交換回路14
に対して内線電話機11より発せられたダイヤル信号に
見合ったDTMF信号の局線インタフェース回路16へ
の送出指示を行う。なお、内線及び局線で送受される音
声等のアナログ信号は、内線及び局線インタフェース回
路12 、16において、PCM変換/逆変換され、電
子交換機の内部では、デジタル信号として取扱われてい
る。また、このデジタル信号の送受を行うためのデータ
バス(PCMハイウェイ)は、複数の内線/局線インタ
フェース回路12 、16と結ばれており、時分割多重
の形で共用化されている。すなわち、個々のインタフェ
ース回路12 、16は、予めデータを送受する時間帯
が定められている時分割交換回路14は、データバスを
通して送られてきたデジタル信号を受け、タイミング変
換を行い、再び、データバス上へ送出する機能を持って
いる。これにより、データを送受する時間帯が変換され
、端末(電話機、局線等)間のデータの変換・接続がな
される。
Prior Art FIG. 3 shows the configuration of a conventional DTMF signal sending device. In other words, in this case, a rotary telephone is used as the extension telephone, and from this telephone, the central office line (PB line) is connected.
It shows the connection of individual circuits and the relationship between signal transmission and reception when a selection signal is sent to a telephone and a telephone conversation is made. Extension telephone 11
The dial signal issued by the telephone is received, counted, and converted into a numerical code in the extension interface circuit 12, and then notified to the call processing control circuit 13. When the call processing control circuit 13 determines that this dial signal is a selection signal for the central office line 17, it instructs the central office line interface circuit 12 to make a call, and also sends a call to the central office line interface circuit 12.
In response to this, an instruction is given to send a DTMF signal corresponding to the dial signal issued from the extension telephone 11 to the office line interface circuit 16. Note that analog signals such as voice transmitted and received over the extension and office lines are PCM converted/inversely converted in the extension and office line interface circuits 12 and 16, and are handled as digital signals inside the electronic exchange. Further, a data bus (PCM highway) for transmitting and receiving digital signals is connected to a plurality of extension line/office line interface circuits 12 and 16, and is shared in a time division multiplexed manner. That is, each interface circuit 12, 16 has a predetermined time period for transmitting and receiving data.The time division switching circuit 14 receives the digital signal sent through the data bus, performs timing conversion, and converts the data again. It has a function to send out onto the bus. As a result, the time zone for transmitting and receiving data is converted, and data is converted and connected between terminals (telephones, office lines, etc.).

付は加えれば、時分割交換回路14内のタイミング変換
の指示、制御は、呼処理制御回路13を通じて行なわれ
る。
In addition, instruction and control of timing conversion within the time division switching circuit 14 is performed through the call processing control circuit 13.

さて、第3図においてDTMF信号の音源15は、局線
、又は専用線を通じて送出されるDTMP信号(アナロ
グ信号)を予め、PCM変換し、デジタル信号の形とし
て書き込まれたROMから構成されている。DTMF信
号は、高群周波数信号と低群周波数信号の混合信号であ
る。例えば選択信号「1」は、1209Hzの高群周波
数信号と、697Hzの低群周波数信号の混合信号であ
る。高群周波数信号4つと低群周波数信号4つの組み合
せで、4×4=16種類のDTMF信号が得られる。通
常、ROMには、16種類のDTMF信号が書き込まれ
ている。DTMF信号の音源15と、時分割交換回路1
4の間は、PCMハイウェイで結ばれており、デジタル
化された複数のDTMF信号は、常時、時分割交換回路
14に向け、時分割で送出されている。補足すれば、時
分割交換回路14へ入力されるデータ系列は有限であり
、その1部を占有する形となる。
Now, in FIG. 3, the DTMF signal sound source 15 is composed of a ROM in which a DTMP signal (analog signal) sent through a central office line or a dedicated line is previously converted into PCM and written in the form of a digital signal. . The DTMF signal is a mixed signal of a high group frequency signal and a low group frequency signal. For example, the selection signal "1" is a mixed signal of a high group frequency signal of 1209 Hz and a low group frequency signal of 697 Hz. By combining four high group frequency signals and four low group frequency signals, 4×4=16 types of DTMF signals can be obtained. Normally, 16 types of DTMF signals are written in the ROM. DTMF signal sound source 15 and time division switching circuit 1
4 are connected by a PCM highway, and a plurality of digitized DTMF signals are always sent to the time division exchange circuit 14 in a time division manner. As a supplementary note, the data series input to the time division exchange circuit 14 is finite, and only a portion of it is occupied.

新ためて、局線インタフェース回路16、局線17への
DTMF信号の送出について詳しく説明する。呼処理制
御回路13よりある局線インタフェース回路16へ、指
定されたDTMF信号の送出指示を受けた時分割交換回
路14は、DTMF信号音源15から送られてくる該当
データ(デジタルDTMF、信号)のタイミング変換を
行い、局線インタフェース回路16に向け、このデータ
を送出する。このデータ(デジタルDTMF信号)を受
は取った局線インタフェース回路16は、PCM逆変換
を行い、アナログ信号として局線へ送出する。また、D
TMF信号の送出時間の制御は、時分割交換回路14で
、局線インタフェースとの接続を切替えること(例えば
、DTMF信号を送出しない時には、無音を局線インタ
フェース回路16へ送出すること。)により行う。
The transmission of the DTMF signal to the office line interface circuit 16 and the office line 17 will be explained in detail again. The time division switching circuit 14 receives an instruction to send a specified DTMF signal from the call processing control circuit 13 to a certain central office line interface circuit 16, and converts the corresponding data (digital DTMF, signal) sent from the DTMF signal sound source 15. Timing conversion is performed and this data is sent to the office line interface circuit 16. The office line interface circuit 16 that receives and receives this data (digital DTMF signal) performs PCM inverse conversion and sends it to the office line as an analog signal. Also, D
The transmission time of the TMF signal is controlled by switching the connection with the central office line interface in the time division switching circuit 14 (for example, when not transmitting a DTMF signal, transmitting silence to the central office line interface circuit 16). .

発明が解決しようとする問題点 しかしながら、上記従来のDTMF信号送出装置では、
予め、DTMF信号をPCM変換し、これを書き込んだ
ROMを使用しているため、送出されるDTMF信号の
音量は、一定のものとして取扱われ、設置された電子交
換機と他の交換機(局線であれば、電話局の交換機、専
用線であれば、他の構内交換機)との距離が大きくなり
、音量を上げるなどの操作が必要になった場合、それを
容易に実現することが困難であるという問題があった。
Problems to be Solved by the Invention However, in the above-mentioned conventional DTMF signal transmission device,
Since the DTMF signal is converted to PCM in advance and a ROM in which it is written is used, the volume of the transmitted DTMF signal is treated as a constant, and the volume of the transmitted DTMF signal is treated as constant, and the volume is different from that of the installed electronic exchange and other exchanges (central line If there is a central office exchange, the distance from the central office exchange, or if it is a leased line, another private branch exchange), and if operations such as increasing the volume are required, it is difficult to do so easily. There was a problem.

また、複数のDTMF信号を常に、時分割交換回路14
に送出しているため、これによ−ってPCMハイウェイ
が占有され、システムから見てPCMハイdエイの数が
増えるなど、PCMハイウェイが、有効に活用されてい
ないという問題があった。
In addition, the time division switching circuit 14 always transfers multiple DTMF signals.
As a result, the PCM highway is occupied and the number of PCM highways increases from the system's perspective, resulting in the problem that the PCM highway is not being utilized effectively.

本発明は、これらの問題点を解決するものであり、PC
Mハイウェイを有効に活用できる優れたDTMF信号送
出装置を提供することを目的とする本発明は、上記目的
を達成するために、別にDTMF信号生成回路(以下D
IPという)を設け、とのDIPによってDTMF信号
の送出音量レベルの注意に可変可能なようにし、PCM
ノ・イウェイを有効に利用出来るように構成したもので
ある。
The present invention solves these problems and provides a PC
The present invention aims to provide an excellent DTMF signal transmission device that can effectively utilize the M highway.
The output volume level of the DTMF signal can be changed by using the DIP and the PCM
The structure is such that the system can be used effectively.

作    用 したがって、本発明によれば、D8Pを用いてDTMF
信号を混合、生成させることができ、この過程で、音量
レベルを、可変にすることができる。
Therefore, according to the present invention, D8P is used to prepare DTMF.
Signals can be mixed and generated, and in the process the volume level can be made variable.

そして、必要に応じてDTMF信号を生成する様に制御
することにより、PCM、−イウェイを効率よく利用す
るができるという作用を有する。
By controlling the generation of DTMF signals as necessary, it is possible to efficiently utilize the PCM and -Iway.

実施例 第1図は、本発明のDTMF信号送出装置における一実
施例を示すブロック薗である。従来例における説明との
重複を避ける為に、DTMF信号の生成、局線インタフ
ェース回路への送出過程を中心にその動作の説明をする
。第1図においてDTMF信号の音源25は、第3図の
それとは、異なり、DTMF信号の高群周波数信号、低
群周波数信号の混合信号ではなく、各々の単音信号とし
て、PCM変換し、デジタル信号化して書き込まれたR
OMを中心に構成されるものとする。このDTMF信号
の音源25からは、高群/低群周波数信号(単音)がD
TMF信号生成回路28に向け、時分割多重で出力され
るものとする。DTMF信号生成回路28は、呼処理制
御回路23より、制御情報(送出する選択信号の種類、
音量レベル、送出タイミング等)を受は取ると、DTM
F信号音源25から送出されている高群/低群の周波数
信号のうち、指示された選択信号の構成成分を選び、D
SP 28に入力し、DSP28において制御情報内の
音量レベルをもとに計算し、DTMF信号に合成される
。(第2図参照)DSP 28で生成された信号は、呼
処理制御回路23からの情報により、タイミング変換さ
れ、PCMハイウェイを通じて局線インタフェース回路
26ニ送られる。ここで、PCM’逆変換、アナログ信
号へ再生送出する。
Embodiment FIG. 1 is a block diagram showing an embodiment of the DTMF signal transmission device of the present invention. In order to avoid duplication with the explanation of the conventional example, the operation will be mainly explained with a focus on the process of generating the DTMF signal and sending it to the office line interface circuit. In FIG. 1, the sound source 25 of the DTMF signal is different from that in FIG. 3, and is not a mixed signal of a high group frequency signal and a low group frequency signal of the DTMF signal, but is converted into a digital signal by PCM conversion as each single tone signal. R written as
It shall be composed mainly of OM. From the sound source 25 of this DTMF signal, a high group/low group frequency signal (single tone) is
It is assumed that the signal is output to the TMF signal generation circuit 28 in a time division multiplexed manner. The DTMF signal generation circuit 28 receives control information (type of selection signal to be sent,
When receiving and receiving (volume level, sending timing, etc.), DTM
Among the high group/low group frequency signals sent from the F signal sound source 25, select the component of the designated selection signal, and
The signal is input to the SP 28, and the DSP 28 calculates it based on the volume level in the control information and synthesizes it into a DTMF signal. (See FIG. 2) The signal generated by the DSP 28 undergoes timing conversion based on information from the call processing control circuit 23, and is sent to the central office line interface circuit 26 via the PCM highway. Here, the signal is inversely converted to PCM' and reproduced and sent out as an analog signal.

又、上記実施例では、DTMF信号生成部が、時分割交
換回路24と離れた所に置かれ、時分割交換回路24と
は、別にタイミング変換、PCMハイウェイへの送出を
行う構成をとる。この様な構成をとることにより、PC
Mハイウェイを無駄に占有するこさなく、効率的に使用
できる。具体的動作としては、第2図のタイミング変換
部32において、呼処理制御回路31から制御情報を基
に、該当タイミングでDTMF信号をPCMハイウェイ
に乗せるものとする。これは、時分割交換回路への入力
系列数を減らさないことを目的とするものである。
Further, in the embodiment described above, the DTMF signal generation section is placed at a location separate from the time division exchange circuit 24, and is configured to perform timing conversion and transmission to the PCM highway separately from the time division exchange circuit 24. By adopting this configuration, the PC
It can be used efficiently without occupying the M Highway unnecessarily. Specifically, the timing converter 32 shown in FIG. 2 puts the DTMF signal on the PCM highway at the appropriate timing based on the control information from the call processing control circuit 31. The purpose of this is not to reduce the number of input sequences to the time division switching circuit.

なお、送出時間の制御等もここで行うものとする。Note that control of transmission time and the like is also performed here.

発明の効果 本発明は、上記実施例から明らかな様に、DSPを用い
て、DTMF信号を生成するようにしたものであり、音
量レベルを可変に設定できるという利点を有する。そし
て、デジタル化したDTMF信号を時分割交換回路を通
さずに、■χハイウェイに送出することにより、DTM
F信号の為だけにPCMハイウェイを占有されることな
く、効率的にそれを使用することができるという効果を
有する。
Effects of the Invention As is clear from the above embodiments, the present invention uses a DSP to generate a DTMF signal, and has the advantage that the volume level can be set variably. Then, by sending the digitized DTMF signal to the ■χ highway without passing through the time division exchange circuit, the DTM
This has the effect that the PCM highway can be used efficiently without being occupied only for the F signal.

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

第1図は、本発明のDTMF信号送出装置における一実
施例の概略ブロック図、第2図は、同要部の詳細なブロ
ック図、第3図は、従来のDTMF信号送出装置の概略
ブロック図である。 21・・・内線電話機(ダイヤル・パルス式)、22・
・・内線インタフェース回路、23 、31・・・呼処
理制御回路、24・・・時分割交換回路、25.33・
・・DTMF信号音源回路、26・・・局線インタフェ
ース回路、27・・・局線、28・・・DTMF信号生
成回路、32・・・タイミング変換部、34−DSP(
Digital  SignallingP roce
ssor )部、35 、36 ・・◆データバス。 代理人の氏名 弁理士 中 尾 敏 男 ほか1名第1
FIG. 1 is a schematic block diagram of an embodiment of the DTMF signal transmitting device of the present invention, FIG. 2 is a detailed block diagram of the same essential parts, and FIG. 3 is a schematic block diagram of a conventional DTMF signal transmitting device. It is. 21...Extension telephone (dial/pulse type), 22...
... Extension interface circuit, 23, 31... Call processing control circuit, 24... Time division switching circuit, 25.33.
...DTMF signal sound source circuit, 26... Office line interface circuit, 27... Office line, 28... DTMF signal generation circuit, 32... Timing converter, 34-DSP (
Digital Signaling Process
ssor) section, 35, 36...◆Data bus. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
figure

Claims (1)

【特許請求の範囲】[Claims] 予めDTMF信号の高群周波数と低群周波数の各成分の
信号をPCM変調してデジタル符号化し、そのデータを
ROMに書き込んでおき、このROMをデジタル信号プ
ロセッサに結合し、上記プロセッサ内で高群周波数及び
低群周波数の各成分の信号を混合させてDTMF信号を
作り出し、局線専用線等へ送出する様に構成したDTM
F信号送出装置。
The signals of the high group frequency and low group frequency components of the DTMF signal are PCM modulated and digitally encoded in advance, and the data is written into a ROM. This ROM is coupled to a digital signal processor, and the high group frequency and low group frequency components of the DTMF signal are encoded in advance. A DTM configured to mix frequency and low group frequency component signals to create a DTMF signal and send it to a private office line, etc.
F signal sending device.
JP15465985A 1985-07-12 1985-07-12 Dtmf signal transmission equipment Pending JPS6215958A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15465985A JPS6215958A (en) 1985-07-12 1985-07-12 Dtmf signal transmission equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15465985A JPS6215958A (en) 1985-07-12 1985-07-12 Dtmf signal transmission equipment

Publications (1)

Publication Number Publication Date
JPS6215958A true JPS6215958A (en) 1987-01-24

Family

ID=15589074

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15465985A Pending JPS6215958A (en) 1985-07-12 1985-07-12 Dtmf signal transmission equipment

Country Status (1)

Country Link
JP (1) JPS6215958A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03248217A (en) * 1990-02-27 1991-11-06 Fuji Photo Film Co Ltd Sample and hold circuit
KR100449884B1 (en) * 1997-12-29 2005-03-08 주식회사 팬택앤큐리텔 Exchange interface device for a wireless local loop, especially with regards to configuring a pcm(pulse code modulated) dtmf memory, while supplying a pcm dtmf input signal
WO2013062000A1 (en) * 2011-10-28 2013-05-02 楽天株式会社 Transmitter, receiver, transmission method, reception method, communication system, communication method, program, and computer-readable storage medium

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03248217A (en) * 1990-02-27 1991-11-06 Fuji Photo Film Co Ltd Sample and hold circuit
KR100449884B1 (en) * 1997-12-29 2005-03-08 주식회사 팬택앤큐리텔 Exchange interface device for a wireless local loop, especially with regards to configuring a pcm(pulse code modulated) dtmf memory, while supplying a pcm dtmf input signal
WO2013062000A1 (en) * 2011-10-28 2013-05-02 楽天株式会社 Transmitter, receiver, transmission method, reception method, communication system, communication method, program, and computer-readable storage medium
JP2013098666A (en) * 2011-10-28 2013-05-20 Rakuten Inc Portable terminal, store terminal, transmission method, reception method, settlement system, settlement method, program and computer-readable storage medium
US9213969B2 (en) 2011-10-28 2015-12-15 Rakuten, Inc. Transmitter, receiver, transmitting method, receiving method, communication system, communication method, program, and computer-readable storage medium

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