JPH01198198A - Analog subscriber's line switching device - Google Patents

Abstract

PURPOSE:To use in common various terminal apparatuses for plural analog subscribe's lines by providing a terminal side signal switching means, a first and a second control signal transmission reception circuits, the switching control means of the subscribe's line and a subscribe's line side signal switching means, and switching the terminal apparatus for plural analog subscribe's lines. CONSTITUTION:After receiving a call request from a terminal apparatus 10, the outgoing line of a cross point switch 25 is selected by a CPU 7 according to numerical information for subscriber's line selection transmitted from the terminal apparatus 10 side, and a channel is set. After setting the channel, calling number information transmitted from the terminal apparatus 10 is transferred to a subscribe's line exchange 5 by the channel through a terminal side switch box 21 and the switch 25. In a case of incoming, the CPU 23 supervises respective analog subscriber's lines 6a-6n, and decides the control signal of the analog subscriber's line the call requests by subscribe's line side switch boxes 27a-27n, and transfers it to the second control signal transmission reception circuit 26. Accordingly, since one terminal apparatus is switched effectively, an economical user's private network can be constructed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention provides an application to a user's premises that has various terminal equipment such as telephones and fax terminals, and a plurality of analog subscriber lines connected to a subscriber line exchange. In particular, the present invention relates to a subscriber line switching device for selectively using a plurality of subscriber lines.

(Prior art) As a form of connecting terminal equipment in a user's home to a desired telephone network, each telecommunications carrier installs a subscriber line switch within the network, and provides international telephone services, domestic telephone services, etc. Each subscriber line switch accommodates subscriber lines in analog form (two-wire metallic lines) and connects telephones, fax terminals, or data terminals installed in the user's premises. Exchange connections are made based on call requests and numeric information from terminal devices in Japan.Additionally, within the telephone networks of domestic telecommunications carriers, new telecommunications carriers (N.C.
C: Abbreviation for New Common Carri'er, hereinafter referred to as rNCC, 1) services are also provided through the backbone line installed.

(Problem to be solved by the invention) Since the conventional analog subscriber line and q terminal equipment are connected in a one-to-one relationship, in the future NCC etc. will provide services up to the subscriber line. In this case, or if a different type of subscriber line is provided, new terminal equipment must be installed. That is, as shown in FIG. 3, a plurality of terminal devices coexist in the user's home. In the figure, 1a to 1n are terminal devices, 3a to 3n are rosettes, 4a to 4n are protectors/switchboards, 5 is a subscriber line exchange for terminating analog subscriber lines, and 6a to 6n are analog subscriber lines. It is. In addition,
The demarcation point of responsibility between the telecommunications equipment provided by the telecommunications carrier and the terminal equipment 1 installed by the user is located at the rosette 3.

However, installing terminal equipment 1 exclusively for each of a plurality of analog subscriber lines is very uneconomical and has the drawback that the in-house wiring equipment becomes complicated. One way to solve this problem is to use special telephone terminal equipment that can select multiple subscriber lines, such as a button telephone device, when all the terminal equipment 1a to 1n are telephone terminals. By doing so, it is possible to switch and use subscriber lines, but this cannot be used when the terminal equipment 1a''-1n includes a fax terminal, a data terminal, etc. The equipment is large and extremely expensive, costing hundreds of thousands of yen per unit.In addition, as a device for switching the NCC backbone line, LCR (Le
ast Co5tRout, 1ns) Soft and NCC
NCC companies provide devices that incorporate an automatic selection function, but these devices only provide the function of connecting one subscriber line and adding an NCC identification number; It does not have the function of connecting subscriber lines or switching subscriber lines.

As shown in FIG.
The structure was not such that it could be used in common with 6n, and the in-house structure was extremely uneconomical. Therefore, there has been a strong desire for a configuration in which the various terminal devices 1a to 1n placed in the user's premises can be used in common with a plurality of analog subscriber lines 6a to 6n, but nothing has been disclosed so far. .

(Structure and operation of the invention) The present invention was made in order to solve the problems of the prior art described above, and it is possible to share various terminal equipment placed in a user's home with multiple analog subscriber lines. The purpose of the present invention is to provide an analog subscriber line switching device that can

A feature of the present invention is that in a user's premises that has various terminal equipment such as telephones and fax terminals, and a plurality of analog subscriber lines connected to a subscriber line exchange, signals from the terminal equipment are terminal-side signal switching means for determining whether there is or is not present or not using a control signal and switching;
first and second control signal transmitting/receiving circuits for transmitting and receiving the control signals to the terminal equipment and the subscriber line exchange; Alternatively, a control means for controlling switching of the subscriber line via a storage means, a switch means for switching the subscriber line based on an instruction from the control means, and a switching means for switching the subscriber line from the analog subscriber line. subscriber line side signal switching means for determining whether the signal is a call signal or a control signal and switching the signal, and by switching the terminal equipment to the plurality of analog subscriber lines. The reason is that it is configured for shared use.

(Embodiment) FIG. 1 is a diagram showing the configuration of a user's premises according to the present invention, and the difference from the conventional configuration is that an analog subscriber line switching device 2 is provided between a terminal device 10 and a rosette 3. In the figure, 10 is one terminal device, 2 is an analog subscriber line switching device, and the other components are the same as the conventional configuration. The subscriber line switching device 2 according to the present invention has a function of switching the subscriber lines 6a to 6n and transferring the necessary information to the subscriber line exchange 5 in response to a call request, numerical information, etc. from the terminal device 10. It is something.

FIG. 2 is a specific configuration diagram of the analog subscriber line switching device 2 according to the present invention, in which n analog subscriber lines 68 to
6n is switched to one terminal device 10. In the figure, 21 is a terminal side converter which is a terminal side signal switching means for determining whether a signal from the terminal device 10 is a call signal or a control signal and switching the signal, and 22 and 26 are terminal device P! ! 10 and the subscriber line exchange 5, first and second control signal transmission/reception circuits for transmitting and receiving control signals; 23, control signal transmission/reception circuits 22 and 26;
A control processor (hereinafter referred to as rcPUJ) which is a control means for controlling the switching of the analog subscriber lines 6a to 6n directly or via a storage means 24 (described later) receives control signals from the terminal equipment 10. A RAM 25 is a storage/reading means for reading and writing call requests, numerical information, etc. based on instructions from the CPU 23, and 25 is a CP.
Crosspoint switches 27a to 27n, which are switching means for switching analog subscriber lines 6a to 6n based on instructions from U23, determine whether the signal from subscriber line exchange 5 is a call signal or a control signal. This is a subscriber line side switch which is a subscriber side signal switching means for determining and switching.

Next, the operation of the present invention will be explained.

(1) Transmission operation In the transmission operation, the following two operation methods can be considered.

(A) First control signal transmission/reception circuit 2 on the terminal PS10 side
After receiving a call request (off-footer signal, etc.) from the terminal device 10 via 2, the CPU 7 selects the outgoing line (analog subscriber line) and set up the call path. After setting the call path, the calling number information sent from the terminal device 10 is sent to the subscriber line exchange 5 via the terminal side converter 21 and the crosspoint switch 25.
will be forwarded to. In this case, the RAM 24 becomes unnecessary.

After the line is connected, the CPU 23 monitors control signals from the terminal equipment IO and the subscriber line exchange 5.

(B) After receiving the call request from the terminal device 10, the terminal device 1
All numerical information starting from 0 (subscriber line selection signal, calling number information) is temporarily stored in the RAM 24 via the first data transmitting/receiving circuit 22. After analyzing the numerical information, the CPU 23 selects the output line of the crosspoint switch 25. Next, the calling number information is transferred to the subscriber line exchange 5 via the second control signal transmitting/receiving circuit 26 on the subscriber line side.

Thereafter, as in (A), the CPU 23 monitors the control signals from the terminal equipment IO and the subscriber line exchange 5.

(2) In the case of an incoming call, the CPU 23 connects each analog subscriber line 6a to 6.
n is monitored, and the control signal of the analog subscriber line in which the incoming call is requested is determined by the subscriber line side switchers 27a to 27n, and the second
After analyzing the numerical information, the CPU 23 sets a communication path via the crosspoint switch 25.

Note that if a bus between the terminal equipment 10 and a certain analog subscriber line has already been set up, busy information is transmitted from the second control signal transmitting/receiving circuit 26 in response to an incoming call request from another subscriber line. Forward.

(Effects of the Invention) The subscriber line switching device 2 according to the present invention is economical because it effectively switches one terminal device in a user's premises that accommodates a plurality of subscriber lines provided for each telecommunications company. It is possible to construct a user's home network, and when used in a business office, etc., there is an advantage that it can be applied without repairing the private branch exchange equipment, etc. Also, the subscriber line switching of the present invention The device 2 also has the advantage that it can be constructed using an LSI chip at a cost of several tens of thousands of yen, and its effects are significant.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a user premises network according to the present invention, FIG. 2 is a block diagram of an analog subscriber line switching device according to the present invention, and FIG.
The figure is a configuration diagram of a conventional user home network. 1a to 1n, 10 - terminal equipment, 2 - analog subscriber line switching device, 3a to 3 n-" rosette, 4a to 4n - protector/switchboard, 5... subscriber line exchange, 6a to 6 n -Analog subscriber line, 21--Terminal side converter, 22.26--Control signal transmission/reception circuit, 23--Control processor, 24--Storage/readout circuit, 25--Cross point switch, 27a-27n...Subscriber line side switch.

Claims (1)

[Claims] Various terminal devices including telephones and fax terminals,
A subscriber line switching device is provided between the terminal equipment and the subscriber lines in a user's premises having a plurality of analog subscriber lines connected to a subscriber line exchange, and the subscriber line switching device is configured to: terminal-side signal switching means for determining whether a signal from the terminal is a call signal or a control signal and switching the signal; and control signal transmission/reception for transmitting and receiving control signals from the terminal equipment and the subscriber line exchange. a circuit, a control means for controlling the switching of the subscriber line using a control signal from the control signal transmission/reception circuit directly or via a storage means, and switching the subscriber line based on an instruction from the control means. and subscriber line side signal switching means for determining whether a signal from the analog subscriber line is a call signal or a control signal and switching the signal from the analog subscriber line to the plurality of terminal devices. An analog subscriber line switching device characterized in that it is configured to be used in common by switching to an analog subscriber line.