JPS5947870A - Line switching system - Google Patents

Abstract

PURPOSE:To realize the automatic incoming function and the telephone function at data communication terminal device off line usage, by providing additionally a relay switch to a connecting section among a telephone exchange circuit, a telephone set and an incoming detection circuit of a network controller and controlling the relay switch from a data communication terminal device. CONSTITUTION:In using the data communication terminal device 1 on off-line, a drive instruction R2C is transmitted to turn off a relay 9 so as to provide the transmission and receiving function to the telephone set 2. When the data communication terminal 1 is desired to change from the off-line usage into the on- line usage, the relay 4 is turned on, and a telephone exchange circuit 3 and the data communication terminal 1 are coupled directly. The relay 4 is turned off at the end of on-line usage.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to line switching in a network control device that performs υ switching of a single communication line between a data communication terminal and an ordinary telephone set, which has a telephone switched line. It is related to the method.

Background of the Technology As part of advanced communication systems, telephone exchange lines are used to communicate information not only between regular telephones but also between a number of different types of terminals such as data communication terminals. In particular, with the introduction of data communication terminal equipment with various functions, the amount of time used for offline processing has increased, and the line switching method of network control equipment that automatically switches the communication line of such terminal equipment, etc., which uses telephone exchange lines, has been improved. It is hoped that this will be realized.

PRIOR ART AND PROBLEMS FIG. 1 shows a J, i7 block diagram of a conventional network control device. In Figure 1, 1 is a data communication terminal, 2 is a telephone, and 6
is a telephone exchange line, 4 is a direct call/data switching relay, 5 is a driver for switching relay 4, 8 is an auto/manual switching switch when receiving, A is an auto side terminal, M is a manual side terminal, 6 is an incoming call detection The circuit 7 is a call announcement signal generator. Further, in the telephone set 2, 2-1 represents a hook switch, which is changed to 0FF10N by up/down of the handset.

Reference numeral 2-2 denotes a direct call bell ringer, 2-6 a transmitting/receiving and dial oscillation circuit, CI a call reception guide signal, DAi'A a data signal, and RfC a relay driver control signal.

Figures 2a-f show the hook switch 2-1, relay 4, and changeover switch 8 in the general representation in Figure 1.
It shows the N10FF state diagram.

In other words, Fig. 2 α shows the hook switch f2-1 in the ON hook state with the handset placed down, and Fig. 2 shows the hook switch f2-1 in the OFF hook state with the handset raised, and Figure 2C shows the relay 4 in the ON state and the relay is connected to the power source, Figure 2D shows the relay 4 in the OFF state and the relay power is off, and Figure 2E shows the changeover switch 8 in the manual state.
FIG. 2f is a state diagram showing the automatic state of the changeover switch-8.

Now, in FIG. 1, when the changeover switch 8 is set to the manual side terminal M (receiving side), the network control device is set to the normal '11-'1. In story 1', only departure and arrival as lq is possible. When the changeover switch 8 is set to the auto side terminal A, the received signal from the 11th exchange line is sent through the hook switch 2-1 (flows to the N detection circuit B, .The relay 4 is turned ON by the incoming call guidance signal CI from the guidance 111 generator 7.
and data communication (activating the S terminal 1, so-called automatic reception is possible. Also, for the optical input r-4114, the hook switch 2-1 must be turned off (2). The oscillation pulse from 2-6 can be sent to the telephone exchange line B.However, if there is a reception from the telephone exchange line 6 while the data communication terminal 15;li+1 is in use offline in the back, Data communication terminal in offline operation] The number 1 detects an interruption by the incoming call guidance signal CI, and notifies the operator of the reception status from the telephone exchange line 6 by some method. There is a drawback that the processing of the communication control section of the data communication terminal 1 is increased.Also, the operator needs to change the changeover switch 8 after seeing the 11th notification from the data communication terminal 1. Another drawback is that it is more complicated to operate than a telephone.

Object of the Invention In order to eliminate these drawbacks, the present invention is characterized in that a relay switch is provided in place of the changeover switch 8, and the on/off of the relay switch is controlled when the data communication terminal 10 is used. The object of the present invention is to provide a line switching system that realizes an automatic f'1 communication function and a k-filling function during offline operation of a data communication terminal. The drawings will be explained in detail below.

Embodiment of the Invention FIG. 6 is an embodiment of the present invention, in which the same symbols as in FIG. 1 indicate the same parts. Reference numeral 9 denotes a relay switch that switches between the telephone 1512 and the incoming call detection section 6, which is an electromagnetic relay (hereinafter abbreviated as relay) in this embodiment, and 10 is the 0N10F of the relay 9.
This is a driver that performs F, and is controlled by a drive command R2C from the data communication terminal 1.

The switching operation in FIG. 6 is as follows.

(1) When both the data communication terminal 1 and the telephone 2 are not in use, the commercial unit 1 operates only the driver 1U and turns the relay 9 on.
``jj: Connect the voice exchange line 6 and the incoming call detection circuit 6, ?''
f I divination (protruding i' ability state) (keep it ni).

(21 (Status 11, short talk '5th lesson 7th lesson 3 to uke 4
If there is j”i, exactly the same as in Figure 1, 1.
Arriving at ir+, iFA guide signal CI is generated ・U, relay 4
By turning on the telephone exchange line 6 and data 11':'
l, 11. "11; The floor rail 1 is connected and the automatic call receiving function is performed."

(If estrus occurs in the state of 61(1), the knock switch 2-1 is turned OFF, that is, the transmitting/receiving device is disconnected from the driver 1D, and the transmitting/receiving and dial oscillation circuit 2-1 is disconnected. 6 is directly connected to line 6, making it possible to send out one pulse from the oscillation circuit 2-6.

(4) From the state of <1), data offline; +
l-l 4ij Terminal 1 When using 1, data Jl
ll lr: i terminal +, :q When i's θ period, etc. (2, send drive command R2C to turn off relay 9, and use theta Norihaku!! ili! wooden machine 1. When terminating, drive command R is sent to keep relay 94'ON.
Send 2c.

(5) Due to the measures in (4), data 1m communication terminal Iso1
While the handset 2 is being used offline, the handset 2 can have normal talking and receiving functions.

(6) In addition, in (4), if you want to change the data communication terminal 1 from the offline usage state to the online usage state, you can perform the normal connection control described below ('L). After confirming the carrier tone, the relay 4 is turned on, and after the telephone exchange line 6 and the data communication terminal 1 are directly connected, for example, an ENQ code is transmitted.

CB) On the receiving side, turn on relay 4 and switch to telephone exchange I! i! 6 and the data communication terminal 1fi 1 are directly connected, a carrier tone is sent out, and after waiting for the other party to send an ENQ code, a data reception system is entered.

Incidentally, when the online use is finished, both the sending and receiving sides turn off the relays 4, return to the state of (4), and connect.

(7) In the state of (1), if there is no basic power supply such as commercial power supply, the relay 9 will be in the O1i'F state,
It can only be used as a regular telephone.

In one embodiment of the line switching system at the network control 1l11'A position of the present invention shown in FIG.
By controlling the switching of the power, data), IQ 4? It is possible to realize an automatic call reception function as a terminal A and a single call (telephone) function when used offline. Even when changing a data communication terminal from offline use to mainline use state (2), it is possible to easily switch from the normal telephone sending/receiving state to the data communication state.

It should be noted that the relay switch 9t, i, and data communication terminal 9 of the present invention may be any element that performs a switching operation in response to the drive command R2C from the west terminal 1, and is not particularly limited to this embodiment.

As described in detail of the invention, on the network side (11i1% position), a relay 9 is installed at the link between the line, the telephone set, and the incoming call detection circuit.
is added, and the relay 9 is controlled from the data communication terminal side 6
By adopting a configuration that allows data 1m communication, and by turning on the relay 9 when the data 1m communication terminal is not in use and turning it off when in use, the automatic call receiving function and the data The disadvantage is that it is easy to implement the telephone function when using the A-line communication terminal.

Currently, with the introduction of personal computer functions in data communication terminals, the amount of time required for offline processing increases, while an automatic call receiving function is becoming an essential requirement for mailbox services. Therefore, the present invention is highly effective in that a system for monitoring 9 signals can be easily established when a data communication terminal is used offline.

[Brief explanation of drawings]

Fig. 1 is a configuration block diagram of a conventional network control device, Fig. 2 α to f are 0N10FF state diagrams of the hook switch, relay, and auto/manual changeover switch during reception in Fig. 1, and Fig. 6 is a diagram of the main switch. This is an embodiment of the invention. 1.1. Data communication terminal, 2... telephone, 5...
Telephone exchange line, 4...Telephone/data switching relay, 5
...Relay 4 driver, 6...Incoming call, first call, 7...Incoming call guidance signal (CI) generator, 8...Auto/manual switching switch when receiving, 2-1.・・Hook switch, 2-2...′ Bell ringer for magnetic talk, 2-6
. . . Transmitting/receiving and dialing oscillation circuit, 9 . . . ″fL call machine incoming call detection circuit 6, relay switch-1
10...Relay switch 9 driver patent applicant Japan 4 Shin Shichiwa Public Corporation agent Patent attorney Tamamukyu 11th Department (3 others) 2nd α A〇- O-

Claims (1)

[Claims] A telephone that switches between a data communication terminal that uses a telephone exchange line and a regular telephone that connects to the telephone exchange line.
A network control device comprising a data switching relay, a driver for the switching relay, an incoming call detection circuit, an incoming call guidance signal generator, an auto/manual changeover switch during reception, etc. A relay switch is added to the connection part with the incoming call detection circuit, and by controlling the relay switch from the data communication terminal, when the data communication terminal is not in use, the telephone exchange line is connected to the incoming call detection circuit. A line switching system characterized in that the telephone exchange line is connected to a detection circuit and switched to the telephone side when the data communication terminal is used offline.