JPH114304A - Terminal equipment for catv telephone system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow the terminal equipment to have sufficient general-purpose performance by making a channel selection condition in a channel routing device independent of an installed area and a charge revision. SOLUTION: The equipment 21 extracts telephone data with a prescribed frequency band among data communicated with a CATV network 30 and provides an output of the extracted data to a telephone set. A least cost routing circuit 29 selects a channel in use based on a received dial number, and in the case that the channel in use is a CATV telephone line, the circuit 29 outputs an identification number of the line, and a channel changeover device 28 receiving the identification number connects the telephone set 40 to the CATV network 30 or an NTT public network 31.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a CATV telephone terminal device using both a CATV network telephone line and an NTT telephone line.

[0002]

2. Related Background Art Conventionally, a CATV telephone line and an NTT telephone line are laid at each subscriber's house as shown in Japanese Patent Application No. 8-306531, for example, in this type of CATV telephone terminal. In addition, a line switcher that automatically selects a line to be used based on a line selection table in which line selection conditions are stored without a subscriber making a decision for selecting a line to be used for each call is provided. there were. The line switcher is connected to a telephone, and the subscriber dials a number (telephone number) for selecting a call partner from the telephone, and based on the first few digits (dial number) dialed. , The line switcher selects the best line,
The telephone and line were connected. In addition, LCR (Least
The Cost Routing) circuit includes a plurality of type 1 communication carrier charge tables corresponding to the dial numbers, and selects a low-cost type 1 communication carrier based on the dial number input from the line switch. In addition, the data of the identification number of the selected type 1 communication carrier is added to the front of the dial number and output to the use line.

[0003]

However, in the above terminal device, the telephone number (area code, local code) differs for each region where the terminal device is installed, so that the line selection conditions in the line switcher change. There was a problem that the line selection table had to be recreated for each installation area.

[0004] Further, once the line selection condition is set, it cannot be externally rewritten.
There has been a problem that even if the type of low-cost line used changes due to the revision of charges by the type of telecommunications carrier, that line cannot be selected. Further, since the line selection conditions are various, there is a problem that a large-capacity storage device for storing the selection conditions is required in the line switch.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and provides a CATV telephone terminal device that is highly versatile, and the line selection conditions in the line switcher do not depend on the installation area or the fee revision. With the goal. Another object of the present invention is to provide a CA that can reduce the capacity of a line selection table.
An object of the present invention is to provide a TV telephone terminal device.

[0006]

According to the present invention, there is provided a CATV telephone terminal device for extracting telephone data in a predetermined frequency band from data transmitted to a CATV network and outputting the extracted telephone data to a telephone. Connected to the telephone, based on a selection signal input from the telephone,
Identification signal adding means comprising an LCR circuit for adding an identification signal for identifying a predetermined type 1 communication carrier; and a line for connecting the telephone set to a CATV network or a telephone line network according to the added identification signal. There is provided a CATV telephone terminal device provided with a connection means comprising a switching device.

That is, based on the selection signal input to the LCR circuit, a predetermined type 1 operator is identified, and the identification signal of the type 1 operator is output. Select the line to use according to the telephone and CATV
A network or a telephone line network is connected. The LCR circuit has a storage unit for storing the data of the selection signal and the data of the connected CATV network or telephone line network corresponding to the data of the selection signal. Data and the connected C corresponding to the data of the identification signal.
It is preferable to have a storage unit for storing connection data of the ATV network or the telephone line network (for example, contact information of a changeover switch).

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A CATV telephone terminal device according to the present invention will be described with reference to FIGS. FIG.
1 is a system configuration diagram showing an example of a telephone system using a CATV telephone terminal device according to the present invention. In the figure, a CATV center station 10 and a CATV telephone terminal device 21 installed in a subscriber premises 20 are connected via a CATV network 30 and are connected to a NTT of a first type communication carrier.
They are connected via a public network 31, an NCC public network 32, and the like.

[0009] The CATV center station 10 converts the telephone signal fetched by the exchange 11 into a CATV telephone center device 12.
The signal is converted into a signal of a high frequency band (RF) and input to the head end 13. In addition to receiving terrestrial broadcasts, the head end 13 receives CATV broadcast waves from broadcast satellites, communication satellites, and the like, converts the broadcast waves into RF CATV broadcast signals, and transmits the RF CATV broadcast signals to the RF CATV broadcast signals. An RF telephone signal from the center device 12 is synthesized. In addition,
The telephone signal includes, for example, an audio signal and an image signal in a predetermined frequency band.

The combined signal is transmitted via a CATV network 30 to a CATV telephone terminal device 2 having a line switching function.
1 where the signal is split into two,
One signal is converted to a telephone signal and sent to the telephone 40 to enable a call, and the other signal is received at the home terminal 41 and converted to a baseband television signal, and the Display and the like become possible.

FIG. 2 is a block diagram showing one embodiment of the configuration of the CATV telephone terminal device shown in FIG. In the figure, the CATV telephone terminal device 21 of the present embodiment has a CA
CATV such as coaxial cable or optical fiber with TV network 30
A connector 22 connected through a line 33, a modular connector 23 connected through an NTT public network 31 and an NTT telephone line 34, a modular connector 24 connected with a telephone 40, and a home terminal 41. And a connector 25.

An RF signal from the CATV network 30 is split into two by a distributor 26 connected to the connector 22, and one of the RF signals is output from the connector 25 to the home terminal 41. The other RF signal is CATV
The signal is input to the telephone terminal modem 27, where it is converted into only a telephone signal in a predetermined frequency band and output to the line switch 28. The telephone signal is sent from the line switch 28 to the telephone 40 via the LCR circuit 29. In the present embodiment, the splitter 26 is a two splitter that splits a signal into two. However, the present invention is not limited to this. For example, a splitter or a splitter with three or more splitters may be used. Is also possible.

FIG. 3 is a block diagram showing an example of the configuration of the LCR circuit 29 shown in FIG. In the figure, LCR
The circuit 29 includes a control circuit 29a connected to the telephone 40 via the office lines 43 and 44, a control circuit 29a and the telephone 4
0, and the line switch 28 and the office line 43,
And an identification number adding circuit 29b connected via the control circuit 44.

As shown in Table 1, the control circuit 29a
A charge table 29c for storing the call charges per unit time of the ATV line 33 and the NTT telephone line 34 in correspondence with a selection signal of the first few digits of a dial signal (hereinafter referred to as "dial number"); As shown in
1XY dial numbers starting with "1" or other type 1 telecommunications carriers (other long distance NCCs, international telecommunications carriers, etc.)
Line selection table 29d for storing the identification number of the telephone line and the data of the connected NTT telephone line 34 in association with each other.
have.

In Table 1, "01xx-x
× ”,“ 02xx-xx ”,“ 0463-69 ”,“ 0
5xx-xx "and" 09xx-xx "are CATV networks 3
0 indicates the area code and the local area code of the subscriber or the area code and the local area code of the long-distance call, "0463-21", "046"
"3-70" indicates the area code and the local area code of the subscriber of the NTT public network 31, "69" indicates the local area code of the subscriber of the CATV network 30, and "21" and "70" , Indicates the local station number of the subscriber of the NTT public network 31. In Table 2, “104”, “106”, and “177” indicate the 1XY system of the NTT public network 31, and “001”, “0070”
Indicates an identification number of another type 1 communication carrier. here,
The above “x” indicates an arbitrary number.

In this embodiment, as shown in FIG.
It is assumed that the exchange 11 installed in the TV center station 10 is connected to a long-distance system type 1 carrier (NCC). Therefore, in the charge table 29c of the present embodiment, if the number dialed from the telephone 40 is a number for making a long distance toll call or a number for making a call within the same CATV network, the charge is low. For a CATV line, a local telephone number, a short-distance toll call number, a 1XY number of the NTT public network, or an NTT telephone line for a number for making a call with another type 1 carrier Is selected so that the dialed number is associated with the selected line.

[0017]

[Table 1]

[0018]

[Table 2]

The control circuit 29a fetches a dial signal (telephone number of the other party) corresponding to the button operation from the telephone 40, and switches a low-charge line among the call charges of the line corresponding to the dial number in the dial signal. If it is selected from the charge table 29c and the line is a CATV telephone line, the data of the identification signal including the identification number of the line is output to the identification number adding circuit 29b.

When the dial number set to NTT is input, the control circuit 29a selects the NTT telephone line 34, and controls the 1XY dial number and other first dial numbers.
When the identification number of the seed communication carrier is input, the NTT telephone line 34 is selected and data output of the identification signal to the identification number adding circuit 29b is not performed regardless of the fee system.

The identification number adding circuit 29b adds the identification number before the telephone signal and outputs it to the line switch 28 when the identification number is input. Transmits only the telephone signal to the line switch 28
Output to FIG. 4 is a block diagram showing an example of the configuration of the line switch 28 and its peripheral devices. In the figure, the line switch 28 is a CATV line 33 or an NTT telephone line 3.
Changeover switch 28 for selecting 4 and connecting to telephone 40
a control circuit 28 connected to the CATV line 33, the NTT telephone line 34, and the telephone 40, and to the CATV telephone terminal modem 27 and the power supply monitoring circuit 36.
b.

The changeover switch 28a has a terminal 1 of CATV.
It is connected to a CATV line 33 via a telephone terminal modem 27, and the terminal 2 is connected to an NTT telephone line 34. The control circuit 28b has a function of detecting an incoming signal on the lines 33 and 34. When detecting the incoming signal from one of the lines, the control circuit 28b controls the operation of the changeover switch 28a to connect the line having the incoming signal to the telephone And ring the bell of the telephone 40.

Further, as shown in Table 3, the control circuit 28b has a line selection table 28c in which data of line identification numbers and data of terminals to be connected are stored in association with each other. Note that the correspondence can be set on software of the control circuit 28b.

[0024]

[Table 3] The control circuit 28b is a terminal modem 2 for CATV telephones.
7 or in response to an abnormal signal from the power supply monitoring circuit 36.

That is, the CATV telephone terminal modem 27
Is, for example, the RF signal of the CATV network 30 is
When transmission to the terminal device 21 is stopped or when the power of the terminal device 21 is turned off due to a power failure or the like, a call cannot be made via the CATV network 30. Therefore, these states are monitored.
When the CATV telephone terminal modem 27 detects these states, it sends an abnormal signal to the control circuit 2 of the line switch 28.
8b. When the abnormal signal is input, the control circuit 28b controls the switch 28a to switch to the contact 2 side so as to forcibly use the NTT telephone line 34, and connects the NTT telephone line 34 to the telephone 40. ,
A telephone call via the NTT telephone line 34 is enabled.

The power supply monitoring circuit 36 is, for example, an NTT
When the telephone line 34 is disconnected or the like, it becomes impossible to communicate via the NTT telephone line 34. Therefore, the power supply voltage (power supply voltage for operating the telephone) of the NTT telephone line 34 is monitored. When the power supply voltage is out of the range of a preset normal value (for example, DC voltage 48 V ± 10 V), the power supply monitoring circuit 38 sends an abnormal signal to the control circuit 28 b of the line switch 28. When the abnormal signal is input, the control circuit 28b forcibly sets the CATV
The switching control of the changeover switch 28a to the contact 1 side is performed so as to use the line 33, and the CATV line 33 and the telephone 40 are connected to each other, so that a telephone call via the CATV line 33 is enabled.

The CATV telephone terminal modem 27 and the power supply monitoring circuit 36 stop outputting the abnormal signal and notify the line switch 28 when the abnormal line returns to the normal state. Upon detecting the stop of the abnormal signal, the line switch 28 shifts from the above-described forced switching control to the normal state switching control. Therefore, in the present embodiment, the status of both lines is monitored by the modem and the monitoring circuit, and if one of the lines becomes unavailable for some reason, it is forcibly switched to use the other line. The connection failure can be prevented, and the optimum line selection can be automatically performed.

Here, the subscriber is a CATV telephone terminal 2
When the telephone number of the other party is dialed from the telephone 40 connected to the telephone number 1, the LCR circuit 29 searches Tables 1 and 2 based on the first few digits of the telephone number and selects a low-cost line. That is, the LCR circuit 29 is connected to the exchange 1
1 through the NCC public network 32 connected to the PC 1 if the call rate is low or CATV
When a call is made with a telephone in the network 30, the CATV telephone line 33 is selected, and the identification number of the CATV telephone line (for example, "0089") is added before the telephone signal and output to the line switch 28. .

When a call is made with a telephone in the NTT public network 31, or when a "1XY" number or an identification number of another type 1 communication carrier is entered, the NTT telephone line 34 is selected. Then, only the telephone signal is output to the line switch 28. If the first few digits of the input number are the identification numbers of the above CATV telephone line, the line switch 28
The line 33 is connected to the telephone 40, and if the first few digits of the input number are not the identification number of the CATV telephone line, the telephone is connected to the NTT telephone line 34.

Each time the rate of the first-class communication carrier is revised, the revised data is transmitted using the telephone line.
It is transmitted to the control circuit 29a of the CR circuit 29, and the control circuit 29a can rewrite the stored contents of the charge table 29c based on the revised data (see FIG. 3). As described above, in this embodiment, when a subscriber makes a call, the LCR circuit selects a line, and the line switcher sets the C
The line is switched by judging only the presence or absence of the identification number added only when selecting the ATV telephone line.
The line switching condition does not depend on the installation area of the ATV telephone terminal device, the selection condition is reduced, and the capacity of the storage device in the line switch is reduced.

Further, in this embodiment, when the charge of the first-class communication carrier is revised, the charge table in the LCR circuit is also rewritten, so that it is possible to always select a low-charge line. In the present invention, it is also possible to select a line using, for example, a line selection table shown in Table 4 instead of the charge table shown in Table 1.

[0032]

[Table 4]

In this case, the LCR circuit does not need to judge a low charge, and can quickly select a line and reduce the number of storage items, so that the storage device in the LCR circuit can be reduced in capacity. . Further, in the present invention, it is also possible to create a line selection table in which the contents of the dial numbers shown in Table 4 are, for example, only those using CATV, and in this case, the storage in the LCR circuit is performed. It is possible to further reduce the capacity of the device.

[0034]

As described above, according to the present invention, CA
In a CATV telephone terminal device for extracting telephone data in a predetermined frequency band from data transmitted to a TV network and outputting the data to a telephone, joining a CATV network or a telephone line network connected to the telephone and inputting from the telephone. Identification signal adding means for adding a predetermined identification signal based on a selection signal for identifying a person, and connection means for connecting the telephone set to a CATV network or a telephone line network according to the added identification signal. Therefore, the line selection condition in the line switcher does not depend on the installation area or the fee revision, and the versatility is enhanced.

Further, the identification signal adding means has a storage unit for storing the data of the selection signal and the data of the connected CATV network or telephone line network corresponding to the data of the selection signal. Has a storage unit for storing the data of the identification signal and the data of the connected CATV network or telephone line network corresponding to the data of the identification signal, so that the capacity of the line selection table can be reduced. .

[Brief description of the drawings]

FIG. 1 is a system configuration diagram showing an example of a telephone system using a CATV telephone terminal device according to the present invention.

FIG. 2 is a block diagram showing one embodiment of the configuration of the CATV telephone terminal device shown in FIG. 1;

FIG. 3 is a block diagram illustrating an example of a configuration of an LCR circuit illustrated in FIG. 2;

FIG. 4 is a block diagram illustrating an example of a configuration of a line switch shown in FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 CATV center station 20 Subscriber premises 21 CATV telephone terminal device 22-25 Connector 26 Distributor 27 CATV telephone terminal modem 28 Line switch 28a Switch 28b, 29a Control circuit 29 LCR circuit 29b Identification number addition circuit 29c Line selection Table 30 CATV network 31 NTT public network 32 NCC public network 33 CATV line 34 NTT telephone line 36 Power supply monitoring circuit 40 Telephone 41 Home terminal

Claims (3)

[Claims] 1. Data transmitted to a CATV network,
A CATV telephone terminal device for extracting telephone data in a predetermined frequency band and outputting the extracted telephone data to a telephone, comprising: an identification signal adding unit connected to the telephone and for adding a predetermined identification signal based on a selection signal input from the telephone; The telephone and the CAT according to the added identification signal.
A terminal device for CATV telephones, comprising: connection means for connecting to a V network or a telephone network. 2. The method according to claim 1, wherein the selection signal comprises a signal for identifying a subscriber of the CATV network or the telephone line network, and the identification signal adding means corresponds to the data of the selection signal and the data of the selection signal. The CATV telephone terminal device according to claim 1, further comprising a storage unit for storing the data of the connected CATV network or telephone line network. 3. The connection means, wherein: the data of the identification signal; and the connected CA corresponding to the data of the identification signal.
2. The CATV telephone terminal device according to claim 1, further comprising a storage unit for storing connection data of a TV network or a telephone line network.