JPH07234290A - Time signal servicing device - Google Patents

Abstract

PURPOSE:To provide a small, low-cost time signal servicing device which can be installed in each subsidiary station. CONSTITUTION:A quartz oscillator 21 generates frequency signals of high stability and outputs them to a time counter circuit 22. The time counter circuit 22 counts the frequency signals, and outputs time signals in timing to a sound editing circuit 23 every predetermined period (e.g. a period of ten seconds). The sound editing circuit 23 edites the sounds of a time-signal message from the time signals and outputs the edited sounds to a sound memory 25 so as to store them. The time counter circuit 22 outputs the time signals to control a tick/time signal generator circuit 24 to output the ticks and time signals in timing. A synthesizer circuit 26 adds together and synthesizes the sounds of a time-signal message from the sound memory 25 and the ticks and time signals from the tick/time signal generator circuit 24, and the synthesized sounds are output form a message output circuit 27.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a time signal service device, and more particularly to a time signal service device installed in a digital telephone exchange of a lower station.

[0002]

2. Description of the Related Art FIG. 3 is a system block diagram showing an example of a time signal service system in a conventional telephone exchange.

Referring to FIG. 3, an analog type local telephone switching center (LS) 14 accommodating a plurality of subscriber terminals (only one subscriber terminal 11 is shown in the figure) is an incoming trunk (ICT). 15, trunk line 5 and outgoing trunk (OG
Toll Telephone Exchange (TS) 6 which is a higher station via T) 61
Connected with, TS6 is a time signal service trunk (SVT)
It is connected to the time signal service device (TMS) 7 through 62.

Since the TMS 7 is installed outside the telephone exchange in the TS 6 and has an analog interface with the SVT 62, it converts a highly accurate digital time signal to an analog time message and outputs it to the subscriber terminal 11 through the trunk line 5 and the LS 14. It is a large and expensive device.

Further, between the TS 6 and each LS 14, there are installed the relay lines 5 exclusively used to provide the hourly time signal service in a quantity corresponding to the traffic of the time signal service between the two stations. It was

That is, when the time signal service is provided to the subscriber terminal 11, the analog time signal message from the TMS7 installed in the TS6 is SVT62, TS6, OGT.
The time signal service line was set up via 61, the relay line 5, the ICT 15 and the LS 14.

Although only one LS 14 is shown in FIG. 3, a plurality of LSs are generally installed as subordinate stations of TS6.

[0008]

In this conventional time signal service system, a relay line dedicated for transmitting a time signal message is required between the TS and a plurality of LSs. However, there was a problem that the line could not be used effectively.

There is also a problem that the quality of the time signal service depends on the line quality of the installed relay line.

Further, there is a problem that the time signal service device installed in the TS becomes a large-scale and expensive device with high accuracy.

An object of the present invention is to provide a time signal service device for transmitting a time signal message to a subscriber terminal accommodated in a time division switch of a digital telephone exchange of a lower station, and interface with the time division switch to store the time signal message. And a sending / editing means for editing the time signal message read from the storing means and sending the edited time sending message to the subscriber terminal. Therefore, the card type card can be installed in the telephone exchange of each subordinate station. It is to provide a small and inexpensive time signal service device.

According to the present invention, there is provided a time signal service apparatus for transmitting a time signal message to a subscriber terminal accommodated in a time division switch of a digital telephone exchange of a lower station, the time division switch including: There is provided a time signal service device comprising an interface for storing the time signal message, and an editing / sending device for editing the time message read from the memory and sending the edited message to the subscriber terminal. .

Further, a crystal oscillator, a time counting circuit for counting the frequency signal output from the crystal oscillator, and a voice unit edit for editing the time signal output from the time counting circuit in a predetermined cycle into a voice unit of a time message. A circuit, a sound piece memory for storing the output of the sound piece editing circuit, a second sound / time signal sound generation circuit for generating a second sound and a time signal sound from the output signal of the time counting circuit, The sound piece and the second sound
There is provided a time signal service device comprising a synthesizing circuit for synthesizing the second sound and time signal sound from the time signal sound generating circuit, and a message output circuit for outputting the time signal message synthesized by the synthesizing circuit.

Further, a time correction circuit for automatically correcting an error of the time signal before the time message is edited by the time signal detected from the public broadcast radio wave may be provided.

Furthermore, the crystal oscillator, the time counting circuit, the sound piece editing circuit, the sound piece memory, the second sound / time signal sound generating circuit, the synthesizing circuit, the message output circuit, and the time correcting circuit are integrated into one unit. A time signal service device mounted on a single printed circuit board can also be used.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of a time signal service device of the present invention.

Referring to FIG. 1, the LS in the present embodiment.
Includes a telephone exchange 1 that accommodates a subscriber terminal 11, a card type time signal service device 2, and a public broadcast time signal detection device 3.

The telephone exchange 1 is a time division switch (TDS) for accommodating a plurality of subscriber terminals (only one subscriber terminal 11 is shown in FIG. 1) and a card type time signal service device 2.
W) 12 and a central processing unit (CPU) 13 that controls all sequence control in the telephone exchange 1.

The card-type time signal service device 2 includes a crystal oscillator 21 for generating a highly stable frequency signal and a time counting circuit 22 for counting the frequency signal output from the crystal oscillator 21.
Then, the time counting circuit 22 outputs a predetermined period (for example, 10
A voice unit editing circuit 23 for editing the time signal output in the second cycle) into a voice unit of a time message, and this voice unit editing circuit 23.
Voice memory 25 for storing the output of the
The second sound / time signal sound generation circuit 24 for generating the second sound and the time signal sound from the output signal of, and the sound message of the time message from the sound module memory 25 and the second sound / time signal from the second sound / time signal generation circuit 24 A synthesizing circuit 26 for synthesizing, a message output circuit 27 for outputting the time signal message synthesized by the synthesizing circuit 26, and a time signal message (geographic signal) detected by the public broadcast time signal detecting device 3 from the public broadcast radio wave to generate a time signal message. A time correction circuit 28 for automatically correcting the error of the time signal before editing is provided.

Next, the operation of this embodiment will be described.

The crystal oscillator 21 generates a high-stability frequency signal and outputs it to the time counting circuit 22. Time counting circuit 22
Outputs the time signal to the speech piece editing circuit 23 at a constant cycle (for example, a cycle of 10 seconds) by counting this frequency signal.

The voice unit editing circuit 23 edits the voice unit of the digital time signal message from the time signal and outputs it to the voice unit memory 25 for timing storage.

Further, the time counting circuit 22 outputs a time signal to control the second sound / time signal sound generation circuit 24, and outputs the digital second sound / time signal sound of a fixed cycle at the timing. Here, the cycle of the second sound is 1 second, and the cycle of the time signal sound is, for example, 10 seconds.

The synthesizing circuit 26 is provided with a sound piece of the time signal message from the sound piece memory 25 and a second sound / time signal sound generating circuit 24.
The second sound and the hourly sound from are added and combined and output from the message output circuit 27, and the hourly service is provided to the subscriber terminal 11 via the TDSW 12.

Further, the public broadcast time signal detecting device 3 in this embodiment detects a time signal from the received radio waves, for example, every hour, and uses the detected signal as a ground signal for the time correction circuit 28.
Output to.

When the time correction circuit 28 receives this ground signal, it rounds down or rounds up the count value of the time count circuit 22 in minutes by the received timing. To correct the count value.
Further, all the count values in seconds are cleared, and the frequency signal from the crystal oscillator 21 is newly counted.

Therefore, the card type time signal service device 2
Accuracy depends on the accuracy of the time signal of the external public broadcasting, and as a result, it becomes an error (several tens of ns) corresponding to the frequency signal of the crystal oscillator 21, and a highly accurate time signal service can be realized. However, when initializing the time in the time signal service device of the present embodiment, the error from the time signal of the public broadcasting must be within 30 seconds.

FIG. 2 is a block diagram of a trunk card type time signal service apparatus showing an application example of the present invention.

Referring to FIG. 2, the trunk card type service device 4 of this application example includes an interface device controller block (IFDVC) 41, a timing controller block (TMCTL) 42, a time set block (TMSET) 43, and a time signal controller block. (TMSGC) 44, voice controller block (VCCTL) 45, voice interface block (VCINF) 46, add controller block (ADCTL) 47, voice / tone interface block (VTINF) 48 and time signaling detector block (TSDET) 49 9 blocks It is a package type that includes all of these blocks on one printed circuit board, and is a general-purpose digital electronic exchange for offices. Having a call trunk and same interface (this is referred to as a trunk card type) is a signal service device.

Here, the function of each block will be described.

The IFDVC 41 distributes signals for busy lamp control and the like in accordance with control signals from the trunk module controller (TMC) and collects various alarms in the card type package and reports them to the TMC.

The TMCTL 42 generates a clock of 8 KHz by a counter from a crystal oscillator.

The TMSET 43 sets the time by the man-machine interface and replaces the BCD code with the HEX code by using the data ROM.

The TMSGC 44 is provided with a counter and a ROM, and generates a "pico" time signal sound every 10 seconds.

The VCCTL 45 manages whether or not the time signal service is carried out by connecting the voice unit data of the time announcement data stored in advance in the built-in ROM.

The VCINF 46 outputs the voice unit data stored in the address indicated by the VCCTL 45.

The ADCTL 47 synthesizes the time signal data and the voice data and outputs them as one PCM data.

The VTINF 48 accumulates the data synthesized by the ADCTL 47 in the FIFO at an internal timing, converts it into serial data at the timing of the clock from the TMC, and outputs it to the TMC through the IFDVC 41.

The TSDET 49 detects a time signal from broadcast radio waves and inputs it to the VCCTL 45.

[0039]

As described above, according to the present invention, the time signal service device is a trunk card type time signal service device with a highly stable crystal oscillator built-in, and the time signal extracted by receiving the radio wave of the public broadcasting is used. Since the time of the time signal service device is corrected, there is an effect that a small, inexpensive, highly accurate time signal service can be provided for each lower station (local telephone exchange).

Therefore, it is not necessary to install a large and highly accurate time signal service device in the upper station, and the relay line between the upper station and a plurality of lower stations is not exclusively used for the time signal service. Have.

Further, since the digital time signal message is created in the subordinate station, there is an effect that the sound quality of the time signal service provided to the subscriber becomes extremely good.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a time signal service device of the present invention.

FIG. 2 is a block diagram of a trunk card type time signal service apparatus showing an application example of the present invention.

FIG. 3 is a system block diagram of an example of a time signal service system in a conventional telephone exchange.

[Explanation of symbols]

1 Telephone Switch 2 Card Type Time Signal Service Device 3 Public Broadcast Time Signal Detection Device 4 Trunk Card Time Signal Service Device 5 Relay Line 6 Toll Telephone Exchange Office (TS) 7 Time Signal Service Device (TMS) 11 Subscriber Terminal 12 Time Division Switch ( TDSW 13 Central Processing Unit (CPU) 14 Local Telephone Switching Office (LS) 15 Incoming Trunk (ICT) 21 Crystal Oscillator 22 Time Counting Circuit 23 Voice Unit Editing Circuit 24 Seconds / Hourly Sound Generation Circuit 25 Voice Unit Memory 26 Synthesis Circuit 27 Message output circuit 28 Time correction circuit 41 Interface device controller block (IFDVC) 42 Timing controller block (TMCT)
L) 43 time set block (TMSET) 44 time signal controller block (TMS)
GC) 45 Voice controller block (VCCTL) 46 Voice interface block (VCINF) 47 Add controller block (ADCTL) 48 Voice tone interface block (VT)
INF) 49 Time Signaling Detector Block (TS
DET 61 Outgoing trunk (OGT) 62 Timely service trunk (SVT)

Claims (4)

[Claims] 1. A time signal service device for transmitting a time signal message to a subscriber terminal accommodated in a time division switch of a digital telephone exchange of a lower station, and a memory for storing the time signal message by interfacing with the time division switch. A time signal service device comprising: a means and an editing and sending means for editing the time information message read from the storage means and sending the edited message to the subscriber terminal. 2. A crystal oscillator, a time counting circuit for counting the frequency signal of the crystal oscillator output, and a voice unit edit for editing the time signal output from the time counting circuit in a predetermined cycle into a voice unit of a time message. A circuit, a sound piece memory for storing the output of the sound piece editing circuit, a second sound / time signal sound generation circuit for generating a second sound and a time signal sound from the output signal of the time counting circuit, A combination circuit for synthesizing a sound piece and the second / time signal sound from the second / time signal sound generation circuit, and a message output circuit for outputting the time signal message synthesized by the circuit. The time signal service device according to item 1. 3. The time signal service device according to claim 1, further comprising a time correction circuit for automatically correcting an error of the time signal before the time message is edited by a time signal detected from a public broadcast wave. 4. The crystal oscillator according to claim 2, the time counting circuit, the sound piece editing circuit, the sound piece memory, the second sound / time signal sound generation circuit, the synthesizing circuit, the message output circuit, and the claim. Item 5. A time signal service device comprising the time correction circuit according to item 3 mounted on one printed circuit board.