JP3645481B2 - Voice switch system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a voice switch system that provides services such as key telephone, PBX, and Centrex to IP voice signals and simultaneously provides Internet access.
[0002]
[Prior art]
Recently, by integrating IP systems with LAN systems including routers, servers, switching hubs, etc. that provide Internet service functions such as e-commerce and voice exchange service functions such as existing key telephones, PBXs, and Centrex, Voice switch systems that offer a variety of services have been proposed.
[0003]
FIG. 2 shows a configuration example of a conventionally proposed voice switch system. The voice switch system includes a client component 50 that provides a telephone user interface (TUI), a server component 60 that provides a telephone service, and a gateway (GW) component 70 that provides an interface with a public network. Is accommodated in a LAN switch via a LAN cable.
[0004]
The client component 50 accommodates an IP telephone 51, a soft phone 52 having a personal computer (PC) for performing a net meeting, etc., an IP telephone 53 and a PC 54 constituting a call center, and the server component 60 includes a call manager ( Gatekeeper) 61 and a general-purpose server group 62 such as a mail server, a web server, and groupware are accommodated.
[0005]
The GW component 70 accommodates a VoIP GW 71 and a VoIP TA 72, and accommodates an existing terminal such as a cordless telephone base station 75, a two-wire (2 W) analog or digital telephone 76, and a facsimile machine 77. It is like that.
[0006]
FIG. 2 shows only devices related to the IP voice exchange service, but it is possible to coexist with an Internet PC, router, file wall, proxy server, and the like.
[0007]
According to the voice switch system shown in FIG. 2, the existing voice exchange service function is converted into IP and integrated into the LAN system, so that communication costs and operation management costs can be reduced and various services can be provided. Become. For example, by integrating voice and data, services such as “click to dial” become possible, and e-commerce, help desk, distance education, in-house education, video teleconference, CTI, etc. By clicking on the screen on the web, it becomes possible to have a conversation while looking at the screen with a browser.
[0008]
[Problems to be solved by the invention]
By the way, in general, devices related to the Internet connection are local power supply that receives power supply from a commercial power source, and an uninterruptible power supply device or the like is used as a countermeasure in the event of a power failure. In addition, in a conventional LAN system that accommodates IP telephones, it is difficult to supply power from the LAN cable to the IP telephones. Therefore, the IP telephones are individually supplied with power from a commercial power source. Not enough consideration is given, and it is impossible to switch and connect the IP telephone itself to a public line.
[0009]
For this reason, when the voice switch system shown in FIG. 2 is configured, the IP telephone itself cannot be switched to the public line and connected even if the entire system is backed up as a countermeasure against a power failure. It becomes difficult to take measures.
[0010]
In addition, in the conventional LAN system, since both the transmitted signal and the received signal are broadcast and transmitted to other ports, there is a problem that security is not sufficient, and an IP packetized voice signal is There is a problem that it is easily affected by delay, fluctuation, and packet loss. Furthermore, when adding IP terminals, it is necessary to newly install a LAN cable and add transmission equipment in order to provide an IP voice exchange service, resulting in an increase in equipment costs and construction costs. Is concerned.
[0011]
Accordingly, a main object of the present invention made in view of such a point is to provide a voice switch system that can easily cope with a failure or a disaster.
[0012]
[Means for Solving the Problems]
The invention of the voice switch system according to claim 1 that achieves the above object includes a gatekeeper that controls telephone voice data, a gateway that accommodates a public line, a LAN switch that accommodates a router for Internet connection,
Housed in the LAN switch, accommodates analog or digital telephones via a two-wire telephone line, power supply function for supplying power to the telephone, power supply from a backup power supply in the event of a power failure, power supply by the backup power supply A line card having a switching connection function for switching and connecting the telephone to a public line at the time of stopping, an interface function to the LAN,
It is characterized by having.
[0013]
According to the first aspect of the present invention, an analog or digital telephone is accommodated in the LAN switch via a line card and a two-wire telephone line, and power is supplied from the line card to the telephone at all times to make a call via the LAN switch. In the event of a power failure, power supply from the backup power source is continued through the line card, and when power supply by the backup power source is stopped, the telephone can be switched to the public line by the line card to make a call. It is possible to easily cope with disasters.
[0014]
According to a second aspect of the present invention, in the voice switch system according to the first aspect, the LAN switch has a VLAN function and a remote control / management function, and a two-wire telephone line on the telephone side includes a LAN. A data communication terminal is connected via a first adapter having an interface, and the two-wire telephone line on the line card side is also connected to the LAN switch via a second adapter having a LAN interface. ,
The voice and data are superimposed on the two-wire telephone line using different frequency bands and can be transmitted simultaneously.
[0015]
As described above, the LAN switch has a VLAN function and a remote control / management function so that voice and data can be superimposed and transmitted simultaneously on two-wire telephone lines using different frequency bands, thereby enabling DSL. Communication is possible, ensuring security, and when adding IP terminals, newly laying LAN cables or adding transmission equipment to provide IP voice exchange services This eliminates the need for equipment and construction costs.
[0016]
The invention according to claim 3 is the voice switch system according to claim 2, wherein the second adapter is housed in the LAN switch.
[0017]
In this way, the number of external devices is reduced and the system configuration can be simplified.
[0018]
According to a fourth aspect of the present invention, in the voice switch system according to the first, second or third aspect, the LAN switch is separated for voice and data, and at least the voice LAN switch has a VLAN function, remote control / management. The voice LAN switch accommodates the gatekeeper, gateway, and line card, and the data LAN switch accommodates the Internet connection router and the second adapter. .
[0019]
As described above, by separating the LAN switch for voice and data, it is possible to easily avoid the influence of delay, fluctuation, and packet loss on the voice signal converted into the IP packet.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of a voice switch system according to the present invention will be described below with reference to FIG.
[0021]
In the voice switch system shown in FIG. 1, a voice switching hub 1 and a data switching hub 2 are used as LAN switches, and at least the switching hub 1 has a VLAN function and a remote control / management function. Then, the switching hub 1 is connected to the Internet connection router 3 via the switching hub 2.
[0022]
The switching hub 1 accommodates a gatekeeper 4 and a gateway 5, and connects the switching hub 1 to a public line (including a dedicated line) via the gateway 5. The switching hub 1 accommodates a plurality of line cards, here two line cards 6-1 and 6-2, and each of the line cards 6-1 and 6-2 has a two-wire telephone line. The analog or digital telephones 8-1 and 8-2 are accommodated via 7-1 and 7-2.
[0023]
Each of the line cards 6-1 and 6-2 has a power supply function for supplying power to the accommodated analog or digital telephone, and continues power supply from a backup power source (not shown) in the event of a power failure, and when power supply by the backup power source is stopped It has a switching connection function for switching and connecting the accommodated analog or digital telephone to a public line, and an interface function for a LAN.
[0024]
Here, a public line or a dedicated line is accommodated in the line card 6-1, power is supplied to the analog or digital telephone 8-1 from the line card 6-1 at all times, and backup is performed via the line card 6-1 in the event of a power failure. The power supply from the power source is continued to make a call via the line card 6-1, the switching hub 1, and the gateway 5, and when the power supply from the backup power source is stopped, the line card 6-1 can be used for analog or The digital telephone 8-1 is switched to a public line or a dedicated line, and power is supplied from the station side to enable a call.
[0025]
Further, the two-line telephone line 7-2 accommodated in the line card 6-2 is connected to the personal computer 10-1 via an adapter 9-1 on the analog or digital telephone 8-2 side as an add-on line. Similarly, an adapter 9-2 is connected to the card 6-2 side, and the adapter 9-2 is connected to a required port of the switching hub 2.
[0026]
As a result, on the side of the line card 6-2, voice and data are superimposed on the two-wire telephone line 7-2 using different frequency bands, and the voice is switched via the switching hub 1 and the data is switched to the switching hub. 2 to enable simultaneous transmission by the DSL system.
[0027]
On the other hand, the switching hub 2 accommodates the IP telephone 11, the personal computer 10-2, and the server 12 that constitute client components in addition to the Internet connection router 3.
[0028]
According to the present embodiment, when the power supply from the backup power supply is stopped in the event of a power failure, the analog or digital telephone 8-1 is switched to the public line or the dedicated line by the line card 6-1, so that a failure or disaster can be caused. Sometimes it can be easily dealt with. In addition, since the switching hub 1 has a VLAN function and a remote control / management function to transmit voice and data at the same time by the DSL method, it is possible to ensure security and increase the number of IP terminals. At this time, there is no need to newly install a LAN cable or add transmission equipment, and the equipment cost and the construction cost can be reduced. Furthermore, since the LAN switch is separated into the voice switching hub 1 and the data switching hub 2, the influence of delay, fluctuation, and packet loss of the voice signal converted into the IP packet can be easily avoided. . In addition, each line card accommodates an analog or digital telephone via a two-wire telephone line, and when data communication is performed, an adapter is added to the two-wire telephone line, so that the DSL system is used. Therefore, it is possible to construct a system easily and inexpensively by effectively utilizing existing telephone lines.
[0029]
Note that the present invention is not limited to the above-described embodiment, and many changes or modifications can be made. For example, in FIG. 1, the switching hubs 1 and 2 are configured separately, but they may be configured logically separately on the same hardware. The DSL adapter 9-2 on the switching hub 2 side can also be built in the switching hub 2. In this way, the number of external devices is reduced, and the system configuration can be simplified. Furthermore, the number of line cards accommodated in the switching hub 1 can be arbitrarily set, and when the power supply from the backup power supply is stopped, the number of analog or digital telephones connected to the public line or dedicated line, or DSL communication The number of terminals to perform can also be set arbitrarily.
[0030]
【The invention's effect】
According to the present invention, an analog or digital telephone is accommodated in a LAN switch via a line card and a two-wire telephone line, and power is always supplied from the line card to the telephone. Since the telephone is switched and connected to the public line by the line card when the power supply from the backup power supply is stopped, it is possible to easily cope with a failure or a disaster.
[Brief description of the drawings]
FIG. 1 is a configuration diagram showing an embodiment of a voice switch system according to the present invention.
FIG. 2 is a diagram for explaining a conventional technique.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1, 2 Switching hub 3 Internet connection router 4 Gatekeeper 5 Gateway 6-1, 6-2 Line card 7-1, 7-2 Two-line telephone line 8-1, 8-2 Analog or digital telephone 9- 1, 9-2 Adapter 10-1, 10-2 Personal computer 11 IP telephone 12 Server

Claims (4)

A gatekeeper for controlling telephone voice data, a gateway for accommodating a public line, a LAN switch for accommodating a router for Internet connection,
Housed in the LAN switch, accommodates analog or digital telephones via a two-wire telephone line, power supply function for supplying power to the telephone, power supply from a backup power supply in the event of a power failure, power supply by the backup power supply A line card having a switching connection function for switching and connecting the telephone to a public line at the time of stopping, an interface function to the LAN,
A voice switch system comprising: The LAN switch has a VLAN function and a remote control / management function, and a data communication terminal is connected to the two-wire telephone line on the telephone side via a first adapter having a LAN interface. The two-wire telephone line on the line card side is also connected to the LAN switch via a second adapter having a LAN interface.
2. The voice switch system according to claim 1, wherein voice and data are configured to be simultaneously transmitted by superimposing the voice and data on the two-wire telephone line using different frequency bands. The voice switch system according to claim 2, wherein the second adapter is accommodated in the LAN switch. The LAN switch is separated for voice and data, and at least the voice LAN switch has a VLAN function and a remote control / management function, and the voice LAN switch accommodates the gatekeeper, gateway and line card. 4. The voice switch system according to claim 1, 2 or 3, wherein the data LAN switch accommodates the Internet connection router and the second adapter.

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