JPH0375106B2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to electronic switching equipment, particularly high-speed LAN.
(Local Area Network) Concerning data storage methods.

(Prior Art) Generally, telephone voice and low-speed data are accommodated in an electronic exchange and interconnected within the electronic exchange. On the other hand, high-speed LAN data is accommodated in a dedicated high-speed LAN. For example, as shown in FIG. 5, a telephone device 501 that handles telephone voice is housed in an electronic exchange 502, and a high-speed LAN terminal 503 is housed in a high-speed LAN 504. In other words, high-speed LAN data and telephone voice have traditionally been handled separately.

(Problems to be Solved by the Invention) As mentioned above, since high-speed LAN data and telephone voice are handled separately, it is necessary to install both an electronic exchange and a high-speed LAN. Therefore,
There is a problem in that it requires a large amount of investment and space.

(Means for Solving the Problems) The method of accommodating a LAN in an electronic exchange according to the present invention multiplexes digitized telephone voice signals and high-speed LAN data to generate a multiplexed signal.
A multiplexing device that separates this multiplexed signal into a voice signal and LAN data is provided on the terminal side and the electronic exchange side, and the electronic exchange side has a connecting device that interconnects high-speed LAN data. , the telephone voice signal is input to the exchange time division switch network of the electronic exchange, and the LAN data is connected to the LAN data transmission line by the connecting device.

(Example) Next, the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing one embodiment of the present invention.

Referring to FIG. 1, 101 is a telephone that handles telephone voice, 102 is a high-speed LAN terminal, 103 is a multiplexing device (terminal side) for telephone voice and high-speed LAN data, 104 is a subscriber line, and 105 is a Telephone voice and high-speed LAN data multiplexing device (accommodating circuit; switch side); 106 is a switching time division switch network;
And 107 is a high-speed LAN connection device,
Multiplexer 105, time division switch network 10
6 and the LAN connection device 107 constitute an electronic exchange 108. Note that the multiplexing device 10
3,105 includes a multiplexing circuit and a demultiplexing circuit. Telephone voice from telephone equipment 101 is digitized, and this digital voice signal and LAN terminal 1
The high-speed LAN data signal from 02 is multiplexed by a multiplexer (terminal side) 103 and sent to a subscriber line 104 as a digital multiplexed signal.
In the multiplexer (exchange side) 105, subscriber line 1
The digital multiplexed signal received from 04 is separated into a digital telephone voice signal and a high-speed LAN data signal. This digital telephone voice signal is sent to a time division switch network 106 and one high speed LAN.
The data signal is sent to high speed LAN connection device 107. Note that signals are transmitted in the same way in the opposite direction, that is, when signals are sent from the time division switch network 106 and the high-speed LAN connection device 107 to the telephone equipment 101 and the high-speed LAN terminal 102, respectively.

The present invention will be explained in detail. Referring to FIG. 2, 201 is a high-speed LAN terminal, 202 is a telephone, and 203 is an audio signal (that is, an analog signal).
CODEC circuit that converts into digital signal, 204
205 is a multiplexing device (terminal side) for digital telephone voice signals and high-speed LAN data signals, 206 is a subscriber line, and 207 is a multiplexing device for digital telephone voice signals and high-speed LAN data signals ( 208 is a high-speed LAN connection terminal, 209 is an audio connection terminal (on the exchange side), and 210 is a telephone control information connection terminal (on the exchange side). The telephone 202 has a CODEC circuit 203
and the multiplexer 2 via the telephone control circuit 204.
05 is input. And high-speed LAN terminal 2
01 information and the digital telephone voice signal are multiplexed by a multiplexer 205 (terminal side).

In the multiplexing device 205, for example, as shown in FIG. 3, one frame is 125 microseconds long, and one frame consists of a frame synchronization signal 301, a high-speed LAN data signal 302, and a telephone voice signal (digital) 3.
03, and a telephone control signal 304 is generated, and the digital multiplexed signal is generated and sent to subscriber line 2.
06. This digital multiplexed signal is then separated by a multiplexer 207 (exchange side). And high-speed LAN data signals are
The telephone voice signal is transmitted to the LAN connection terminal 208, the telephone voice signal is transmitted to the voice connection terminal 209 (exchange side), and the telephone control signal is transmitted to the control information connection terminal 210 (exchange side). Note that signals from the electronic exchange to the terminal are also transmitted in the opposite direction at the same time. by the way,
The audio connection terminal 209 (exchange side) generally has a so-called
It is a PCM or ADPCM signal. In addition, at the control information connection terminal 210 (exchange side) of the telephone, for example, the so-called LAP-D established by CCITT is used.
It's a signal. In addition, 20 high-speed LAN connection terminals
8, for example, the so-called CSMA signal and CSMA/CD
There are system signals, etc. Note that the transmission format shown in FIG. 3 is an example, and the present invention is not limited to this, and various transmission formats can be considered.

Figure 4 shows one circuit (connection circuit) that interconnects high-speed LAN data. Reference numeral 401 denotes a connection terminal in which the high-speed LAN connection terminal 208 from the multiplexing device (exchange side) is separated in the transmission and reception directions. Further, 402 is a high-speed LAN data connection terminal, 403 is a driver, and 404 is a receiver. High-speed LAN data from the LAN terminal passes through the driver 403 to the high-speed LAN data connection terminal 40.
2. On the other hand, the signal from the high-speed LAN data connection terminal 402 is transmitted to the LAN terminal side via the receiver 404. And CSMA and
In the CSMA/CD method, the output of the driver 403 and the output of the receiver 40 are simply connected to the LAN data connection terminal 402.
It is only necessary to connect directly to the input of No. 4.

Note that in the above embodiment, telephone voice signals and high-speed
Although the case where LAN data is multiplexed and transmitted has been described, low-speed data and high-speed LAN data may be multiplexed and transmitted. This case can also be realized in the same manner as in the embodiment.

(Effect of the invention) As explained above, the present invention provides high-speed
LAN data and digital telephone voice are multiplexed and transmitted over subscriber lines. Therefore, existing electronic exchanges can be used to accommodate data from high-speed LAN terminals, and only one subscriber line is required. A high-speed LAN terminal with telephone voice can be easily configured using a telephone. Note that various other methods such as so-called token passing and token ring methods can be considered as high-speed LAN data, and the present invention can be applied to such cases as well. In addition, multiplexing equipment (terminal side), subscriber line,
When using a high-speed LAN, the propagation delay time at the multiplexing device (exchange side) greatly affects the performance of the LAN, so reducing the propagation delay time is extremely important.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention;
Fig. 2 is a block diagram for explaining the present invention in detail, Fig. 3 is a time chart showing an example of a data transmission system on a subscriber line, and Fig. 4 is a high-speed LAN.
FIG. 5, which is a diagram showing an example of a connecting device, is a block diagram showing a conventional method for accommodating telephone voice and high-speed LAN data. 101...Telephone equipment, 102...High speed LAN
Terminal, 103... Multiplexer (terminal side), 104
... Subscriber line, 105 ... Multiplexer (exchange side), 106 ... Time division switch network, 107
...High-speed LAN connection device, 108... Electronic exchange, 201... High-speed LAN terminal, 202... Telephone, 203... CODEC circuit, 204... Telephone control circuit, 205... Multiplexing device (terminal side ),
206... Subscriber line, 207... Multiplexer (exchange side), 208... High speed LAN connection terminal,
209...Audio connection terminal (exchange side), 210...
...Telephone control information connection terminal (exchange side), 30
1...Frame synchronization signal, 302...High speed
LAN data signal, 303...Telephone audio signal, 3
04...Telephone control signal, 401...Connection terminal from multiplexer (exchange side), 402...High-speed LAN data connection terminal, 403...Driver,
404...Receiver, 501...Telephone equipment, 50
2...Electronic exchange, 503...High speed LAN terminal,
504...High speed LAN.

Claims (1)

[Claims] 1. A plurality of digital multiplex subscriber lines through which digital signals in which high-speed data signals, telephone voice signals, and low-speed data signals are multiplexed are transmitted are accommodated in an electronic exchange that processes telephone voice signals and low-speed data signals. , the digital signal is separated into the high-speed data signal, the telephone voice signal and the low-speed data signal in an accommodation circuit of the electronic exchange;
The telephone voice signal and the low-speed data signal are input to an exchange time division switch network of the electronic exchange, and the high-speed data signal is directly connected to a high-speed data signal line. LAN accommodation method.