JPS60256254A - Data transmission system of catv system - Google Patents

Abstract

PURPOSE:To smooth the talking from a terminal equipment by providing a data channel to a coaxial cable line of a CATV, transmitting an outgoing data from the center to a terminal equipment via the line and allowing the terminal equipment subject to polling to utilize a telephone line thereby attaining incoming data transmission. CONSTITUTION:A polling control instruction of the terminal equipment from a computer 2 of the center side is fed to a mixer 13 via a modulator 12, mixed with the data from a program transmitter 1 and inputted to a coaxial cable 4. A signal from the cable 4 is branched by a branching device 14 at a terminal device 6, a demodulator 15 extracts the control instruction and the address is collated with a microcomputer 10. The own polling is discriminated through the address collation. Then the outgoing data is transmitted from the center to the terminal device 6 via the coaxial cable provided with the data channel, the terminal device 6 subject to polling utilizes a telephone line 5 to transmit an incoming data thereby smoothing the talking from the terminal device 6.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention is directed to an I/O data transmission system for a CATV system that uses an existing subscriber telephone line to carry out wheel drive transmission.
II]

[Prior Art] This type of data transmission system is shown in Figure 1.
, : ((L center's 1' V program jsu's IL adventure 1
Send from [[I2-[v communication'41:l, CA l-
V) FiIth! II 'y-7 le j'l 13i+
+ 4 /i is input to the subscribing owner's terminal 6, and 1 in bark 7 te 1. II ll1g tI 7-1- V receiver 1
1 to video'c rJ41 out J to Ii, Pinter It
'l+'s 1 MB]-92 is the 1) [1 incoming telephone line 5 and sends a data transmission control ti11 command signal to the 1 incoming telephone line 5 via the network control 3jH direct 3 connection.
911-I beater 1 at -7 at end 4.6
It can be set to 0. Maiko terminal 6 (・ is 1)
1" terminal 10 is the terminal network'/1Il
The data is transmitted to the telephone line 5 via the telephone line 5.

[Technical issues] In this way (, the first appearance of the telephone line of the
There is a situation where the telephone 11 of subscriber 1: rings when making a call to terminal 6 in the data transmission system of the Al'V system. i cannot be used for public ffl. On 3y, there was a call from the terminal to the center (with respect to 3 (well, in the CA V system), there were many prostitutes for one Senku: a call was made to rJ (i Zuru relationship (・, tt, '+ 1111) The line was filled with a lot of traffic, and there were times when it became impossible to communicate.

[Object of the present invention] The present invention has been made based on the circumstances described in 1.
A data channel is installed on the TV's coaxial cable line, and C
Downlink data is transmitted from the center to the terminal via the ATV line, and the polled terminal uses the telephone line to transmit data on a regular basis, ringing the telephone bell and communicating with the center. It attempts to provide a data transmission method for the CATV system that enables telephone calls and allows smooth data transmission without concentrating calls from terminals to terminals.

[Configuration of the Invention] For this purpose, the present invention utilizes subscriber telephone lines to
1i! In the data transmission method of the CATV system that collects upstream data from terminal devices, control commands for polling each terminal are transmitted from the center to each terminal via the coaxial coupler line of the CATV system, and each terminal transmits its own h++ Microphone for polled place ■1 noji J-
Riwo Imashi (1 city 7? (1?! 2 episodes Fη line ii l'i
l~ (no 1 li 1゛ -') 11. send
lI <Tai ->J'+1 minus 11 minute and 4
There is a C of the lion.

(Example) Below is an example of the present invention! Example from 2nd VI (!Rite 1-
<I will explain it in a physical way. Here, the configuration is the same as the previous one.

Regarding this part, I will omit the explanation by referring to the same article. The new configurations added here are e-center side c・1, ↓
1 of lJν) of terminal polling from Combi coater 2
- the control command is passed through the modulator 12 to the mixer 13 (J input,
Introducing Ji'il axis cable line 4 j,! a, and from the 4.6 side (, 1 branched through the splitter 14), the signal is transmitted through the demodulator 15.
11 i fi k Take out, \'i'/n 1> Verify address with picoter 10, C1 white or not 1) Determine whether or not it has been polled (j<1).

This J, Ui, IM will be completed ('', Sinter's trip to the Buddha will be sent via telephone line 5, I/Jν), telephone 1ji.
Ringing the bell of i1 is /, yes. In addition, terminal 611, polling l:J, -) from the terminal side, telephone 4-wire 5
Since the full transmission is performed to the center side using
1. Redata transmission is not concentrated and 1. Smooth f-to-night transmission is made on the phone! This can be achieved using 5.

In order to prevent the signal wave from ringing the bell of the telephone 11 when transmitting uplink data from the terminal network control device 9, a band filter is provided for the IEi frequency to prevent the signal wave from ringing the bell of the telephone 11. Signal transmission is <
1. It is necessary to take appropriate measures such as washing or seaweed.

Effects of the Invention As described above, the present invention allows the terminal to read the mil+ command sent from the center via the coaxial cable line using the micro=1 amp coater, and to connect the terminal to the terminal network by address verification. Control the control device and send upstream data?
! Since data is transmitted to the telephone line center side, when a call is made from the center side to each subscriber's home in data communication using a telephone line, connection to the terminal can be made without ringing the telephone bell at the subscriber's home. , it is also possible to control calls (upstream data transmission) from the subscriber's home, and at this time, 5
- It is possible to avoid the concentration of calls4.

[Brief explanation of drawings]

FIG. 1 shows a block diagram of a conventional example, and FIG. 2 shows an example of how to send data (i) of the present invention. ...1 Nbikota, 3
...Center side net leak 1111+ 111Il
& ff, 4...Coaxial cable line, 5...Telephone line, 6...Terminal, 7...1 inverter, 8...TV
Receiver, 9...Terminal network control 14, 1
0...Niku[Ni-1 Beater, 11...Telephone, 12...Converter UA, 13-Mixer, 14-Dunplexer,
1jI...Demodulator. Special applicant: Paia Co., Ltd. Agent Patent Attorney: Jundo Jundo, Patent Attorney (April Susumu-〇-

Claims (1)

[Claims] Collects uplink data from terminal devices using subscriber telephone lines.
! 1. In the data transmission method of the C△TV system,
The υj command for polling each terminal is CAT
It is sent from Senku to each terminal via the V system coaxial cable line, and 1. ↓A data transmission method for a CATV system characterized by capturing polling from itself via a microcomputer and retransmitting the data via a telephone line.