JP4603417B2 - Packet telephone system for power failure - Google Patents

Description

  The present invention relates to a packet telephone system using a packet communication line such as an IP (Internet Protocol) network as a normal external line, and capable of making outgoing and incoming calls even when a power failure occurs or even when the IP network side cannot communicate. .

  In recent years, along with the expansion of the IP (Internet Protocol) network and the reduction of the communication cost thereof, an IP telephone system that performs communication by making IP voice into a voice communication using the IP network as a transmission path is becoming widespread. However, in the case of an IP telephone system, unlike the normal telephone system, operating power is not supplied from the network side, and it cannot be used during a power failure.

  As a countermeasure against this, there is a technique that uses a conventional telephone line in the event of a power failure and enables use even during a power failure (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 10-271243

  However, in Patent Document 1 described above, when a power failure occurs in an IP phone, only a specific IP phone is directly connected to the power failure. Therefore, it is not possible to select at the time of a power failure in a network using a plurality of IP phones. .

  When accommodating a public line in an IP telephone, it is necessary to use separate cables for the IP line and the public line, for example, a UTP cable for the IP line and an ICT cable for the public line.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a power failure-capable packet telephone system capable of making and receiving calls and telephone calls via a telephone line having power supply capability with an arbitrary packet telephone even when a packet communication line cannot be used due to a power failure.

In order to solve the above-described problems, the present invention provides a packet telephone system in which a packet communication line is connected to one or a plurality of packet telephones via a line relay device, and the line relay device accommodates a telephone line having power supply capability. And a means for automatically connecting the packet telephone to the telephone line when the power supply unit of the line relay device is stopped.

  As a result, any of the packet telephones becomes a power failure responsive telephone at the time of a power failure, so that even if a packet communication line cannot be used due to a power failure, an incoming / outgoing call and a telephone call via a telephone line having power supply capability with any packet telephone are possible. It becomes possible and convenience increases.

  According to the present invention, in the packet power system for power failure described above, the line relay device and the packet telephone are connected via a cable having four or more core wires, and the core wire is connected to the packet communication line of the cable. It connects with the said telephone line by core wires other than.

  As a result, since the packet communication line and the telephone line can be connected with the same cable, the wiring between the line relay device and the packet telephone can be realized without being changed, thereby simplifying the construction.

  According to the present invention, in the packet power system for power outage described above, when the line relay device connects the telephone line and an arbitrary packet telephone, a connection between the packet telephone other than the arbitrary packet telephone and the telephone line is established. Means for automatically prohibiting connection is provided.

  As a result, it is possible to automatically and reliably connect the telephone line and the specific packet telephone.

  According to the present invention, even when a packet communication line cannot be used due to a power outage, it is possible to obtain a power outage-capable packet telephone system capable of making and receiving calls and telephone calls via a telephone line having power supply capability with any packet telephone.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a power failure response packet telephone system according to the present invention will be described below in detail with reference to the accompanying drawings.

Figure 1 is a diagram showing an overall configuration of a power failure the corresponding packet telephony system.

  In FIG. 1, an ADSL line (Asymmetric Digital Subscriber Line) 11 is divided into two lines by a splitter 12, and one line becomes an IP line 14 via an ADSL modem 13 with a built-in router. One line is accommodated in the LAN relay device 30 of the power failure response packet telephone system 20 as a public (analog) line 15.

  The power failure response packet telephone system 20 includes a LAN relay device 30 and n units connected to the LAN relay device 30 via n UTP cables (unshielded twisted pairs) 40-1 to 40-n. The power failure direct IP telephones 50-1 to 50-n and the public (analog) line accommodating device 45 such as PBX and FAX connected to the LAN relay device 30 are included.

  Calls can be made through the IP line accommodated in the LAN relay device 30 when energized, and via the public line accommodated in the LAN relay device 30 in the event of a power failure.

Incidentally, in FIG. 1 shows the case of applying the ADSL line as an access line to the IP network (not shown) is not limited to this, optical lines, wireless, etc. as IP line, generally WAN A line or the like is applicable, and in short, it is only necessary that the LAN relay apparatus accommodates an IP line and a public line.

  FIG. 2 is a diagram showing the configuration of the first embodiment of the LAN relay device 30 in FIG.

  In FIG. 2, the LAN relay device 30 includes LAN interface units 31, 31-1 to 31-n, a line selector unit 32, a central control unit (CPU) 34, a power supply unit 35, a DC detection unit 36, and a connector (RJ-45). ) 37-1 to 37-n.

  Here, the connection port 01 is configured by the LAN interface unit 31-1 and the connector (RJ-45) 37-1, and the connection port 02 is configured by the LAN interface unit 31-2 and the connector (RJ-45) 37-2. The connection port n is configured by the LAN interface unit 31-n and the connector (RJ-45) 37-n.

  A central control unit (CPU) 34 controls analysis and determination of input information from the LAN interface units 31 and 31-1 to 31-n.

  The power supply unit 35 includes an AC / DC converter and supplies DC power to each unit, and the DC detection unit 36 monitors the DC voltage generated by the power supply unit 35 and detects whether it is in an energized state or a power failure state.

Line selector section 32, the switching relay of the switching relay 32-p, when energized connects to b1~bn side, during a power failure is connected to a1~an side, connection of the public line power failure and when energized Is switched.

  As a result, even during a power failure, the power failure direct IP telephones 50-1 to 50-n are connected to the public line 15 in a branch, so that any power failure direct communication IP phones 50-1 to 50-n can make and receive calls.

  FIG. 3 is a diagram showing the configuration of the second embodiment of the LAN relay device 30 in FIG.

Here, the line selector unit 32 includes a loop detection unit 32-1 to 32-n and a switching relay unit 32-p, and the loop detection unit 32-1 to 32-n detects the loop current of the public line. performed, and when the switching relay switching relay unit 32-p is the other ports in the event of a power failure using the public line power failure, start using the public line eg connected outage direct IP phone to the connection port 01 in case of power failure Then, the use of the public line of the power failure direct IP telephone connected to other ports, for example, connection ports 02 to n is restricted.

   The constant voltage circuit unit 33 receives power from the public line at the time of power failure and generates power for the line selector unit 32.

In FIG. 3, for example, when the first power outage direct IP telephone, which is one of the 1st to nth outage direct IP telephones connected to the connectors 37-1 to 37-n, is in a call state, a loop is performed. detect a diagram showing the disconnecting another outage direct IP phone other than first switching the switching relay of the switching relay unit. As a result, compared to the branch connection of FIG. 2, it is possible to prevent outgoing and incoming contention and communication interception.

  FIG. 4 is a diagram showing the configuration of the power failure direct IP telephones 50-1 to 50-n in FIG.

Each of the power failure direct IP telephones 50-1 to 50-n includes a connector (RJ-45) 51, a LAN interface unit 53 constituting the energizing circuit unit 52, a central control unit 54, an expansion / compression unit 55, a D / A. , A / D unit 56, call interface unit 57, DC detection unit 58 and power supply unit 59, rectifier circuit unit 61, constant voltage circuit unit 62, dial control unit 63 and call interface constituting power failure (analog) circuit unit 60. A unit 64, a switching relay unit 65, and a transmission / reception unit 66 are configured.

  The power supply unit 59 is provided with an AC / DC converter and supplies DC power to each unit, like the power supply unit 35 of the LAN relay device 30 in FIG. 2, and the DC detection unit 58 monitors the DC power supply 59 to determine whether it is in an energized state or a power failure state. Is detected.

  5 is a diagram showing the wiring of the connectors (RJ-45) 37-1 to 37-n in FIGS. 2 and 3 and the connector (RJ-45) 51 in FIG. The IP line (when energized) uses pins 1, 2 and 3, 5 and the public line (when power fails) uses pins 6 and 7. That is, of the 8 pins of the connector (RJ-45), a part of pins 6 and 7 that are not used in the IP line (during energization) are used for the public line (during power failure).

  Next, the operation at the time of energization of the first embodiment will be described with reference to FIG. 1, FIG. 2, FIG. 4 and FIG.

Since the IP line is used when energized, in this case, in the LAN relay device 30 of FIG. 2, the DC detection unit 36 detects that it is energized, and the switching relay 32-p in the line selector unit 32 is switched. Is controlled so as to be connected to the b1 to bn side.

When the switching relay switching relay unit 32-p are connected to b1~n side, public (analog) line is outputted again from the LAN access point 30, it is accommodated in a public (analog) line accommodating device 45.

  At this time, the connectors (RJ-45) 37-1 to 37-n in FIG. 2 and the connectors (RJ-45) 51 of the power failure direct IP telephones 50-1 to 50-n in FIG. 4 are as shown in FIG. , 1, 2 and 3, 5 pins are used.

The power failure direct IP telephones 50-1 to 50-n in FIG. 4 detect energization from the DC detection unit 59 when energized, and connect the switching relay of the switching relay unit 65 to the c side.

  Therefore, the LAN interface unit 53, the expansion / compression unit 55, the D / A, A / D unit 56, and the call interface unit 57 of the energization circuit unit 52 are connected to the transmission / reception unit 66 by the switching relay unit 65, and are connected via the IP line. Can be called.

  Next, the operation at the time of a power failure in the first embodiment will be described with reference to FIGS. 1, 2, 4 and 5.

When a power failure occurs, the operation of the LAN relay device 30 in FIG. 2 including the DC detection unit 36 stops, and all the switching relays of the switching relay unit 32-p in the line selector unit 32 are on the a1 to an side of the home position. Connected.

  The switching relay unit 32-p may be a type that automatically returns to one contact point (home position) when power supply to the relay (drive signal) is off.

  At this time, the connectors (RJ-45) 37-1 to 37-n in FIG. 2 and the connectors (RJ-45) 51 of the power failure direct IP telephones 50-1 to 50-n in FIG. 4 are as shown in FIG. , 6 and 7 pins are used.

  Also in the power failure direct IP telephones 50-1 to 50-n in FIG. 4, the energization circuit portion 52 including the DC detection portion 59 at the time of a power failure stops operation, and the switching relay portion 65 is the home position when the drive signal is off. Connected to.

  Therefore, the rectifier circuit unit 61, the dial control unit 63, and the call interface unit 64 of the power failure (analog) circuit unit 60 are connected to the transmission / reception unit 66 by the switching relay unit 65, and a call on the public (analog) line is possible. Become.

  The telephone operating power at this time is generated in the constant voltage circuit unit 62 of the power failure (analog) circuit unit 60 by using the local power supply from the public (analog) line.

In the case of the second embodiment, when the power transmission / reception unit 66 in FIG. 4 is lifted during a power failure, for example, the power failure direct IP telephone connected to the connection port 01 of the LAN relay connection device 30 in FIG. When became, the loop detecting unit 32-1 detects the loop state, the switching relay of the switching relay unit 32-p other than the connection port 01 that is the call state, the b2~bn side as shown in FIG. 3 By switching, the use of the public (analog) line of the power failure direct IP telephone connected to the connection ports 02 to n is disabled.

  With this operation, calls other than the power failure direct IP telephone with which the call is established cannot enter the call, so that the call is not duplicated.

  When the power supply is restored from the power failure, the LAN relay device 30 returns to normal operation, the DC detection unit 36 detects the DC voltage, and the central control unit (CPU) 34 recognizes that the IP line has been restored. After notifying each power outage IP telephone 50-1 to 50-n with an IP line return notification, for example, a dial tone, the switching relay unit 32-m of the line selector unit 32 is switched from a1 to an to b1 to bn.

  Further, when the DC detection unit 59 detects the DC voltage, the power failure direct IP telephones 50-1 to 50-n wait to receive the IP line return notification, and after receiving the IP line return notification, the power failure direct IP telephones 50-1 The switching relay unit 65 in ˜50-n is switched and connected from the d side to the c side.

  By performing the above operation, it is possible to prevent a sudden disconnection of the call by notifying the user who is in a call state at the time of a power failure that the IP line is restored and at the same time that the line is switched.

  Next, a third embodiment will be described.

  In the second embodiment, the loop selectors 32-1 to 32-n are provided in the line selector unit 32 in the LAN relay device 30 shown in FIG. Realized. However, before the power failure occurs, the user cannot preferentially designate only a specific telephone as a power failure response.

  In the third embodiment, it is possible to select in advance a telephone that can use a public line during a power failure.

  FIG. 6 is a diagram showing the configuration of the third embodiment of the LAN relay device 30 in FIG. 1. The same reference numerals are given to the same portions as those in the embodiment of FIGS. The part is omitted and simplified.

  In FIG. 6, the loop detection units 32-1 to 32-n of the line selector unit 32 in the LAN relay device 30 in FIG. 3 are the direct port changeover switches 32-q. Here, the direct port changeover switch 32-q is configured by a mechanical switch that does not require power.

  The administrator of the LAN relay device 30 switches the direct port changeover switch 32-q in advance to the changeover relay of the changeover relay unit 32-p corresponding to any connection port 1 to n.

  As a result, in the event of a power failure, only the power failure-compatible IP telephone connected to the connection port that has been switched in advance can make a call on the public line.

  The operation of the IP telephone corresponding to a power failure and the return operation upon energization from the power failure are the same as those described in the first embodiment.

  In FIG. 6, it is also possible to add a loop detection unit (not shown) and use the second and third embodiments together.

  Next, another embodiment will be described.

Figure 7 is a diagram showing the overall configuration of another embodiment of a power failure the corresponding packet telephony systems. In FIG. 7, the same portions as those in FIG. 1 are denoted by the same reference numerals, and the portions described in FIG. 1 are omitted and simplified.

  FIG. 7 is a diagram showing a case where the LAN relay device 30 accommodates a plurality of public (analog) lines.

  For this reason, the LAN relay device 30 includes a plurality of line selector units 321 to 32m for a plurality of public (analog) lines 1 to n, and each line selector unit 321 to 32m accommodates only one public (analog) line. Yes. One to n power outage IP telephones 50-1 to 50-n are connected to one line.

  In FIG. 7, the LAN relay device 30 shows only the line selector units 321 and 32m. The line selector unit 321 stores connection ports 01 to n, and the line selector unit 32m stores connection ports (y + 1) to (y + 1). Note that y represents the number of connection ports accommodated from the line selector unit 1 to the line selector unit (m−1).

  In the case of energization, the power failure direct IP telephone connected to the ports 01 to (y + 1) uses the same IP line. Detailed operations are the same as those in the first, second, and third embodiments, and are therefore omitted.

  In the event of a power failure, the power failure direct IP telephone connected to ports 01 to n can be connected to the public (analog) line 1, and the power failure direct IP telephone connected to ports (y + 1) to (y + 1) is the public line x. Can be connected. Since the operation is the same as in the first, second and third embodiments, the description thereof is omitted.

  In the above embodiment, an analog line is taken as an example of a public line. However, the power failure (analog) direct circuit 60 in FIG. 4 is replaced with a DSU unit (digital line termination unit), an I interface unit, a constant voltage generation unit, and a control. By configuring with a CPU, the present invention can be implemented even when the public line is an ISDN line.

Is a diagram illustrating an overall configuration of a power failure the corresponding packet telephony system. It is a figure which shows the structure of the 1st Example of the LAN relay apparatus 30 in FIG. It is a figure which shows the structure of the 2nd Example of the LAN relay apparatus 30 in FIG. It is a figure which shows the structure of the power failure direct IP telephones 50-1 to 50-n in FIG. It is a figure which shows the wiring of the connector (RJ-45) of FIG.2, FIG3 and FIG.4. It is a figure which shows the structure of the 3rd Example of the LAN relay apparatus 30 in FIG. It is a diagram illustrating the overall configuration of another embodiment of a power failure the corresponding packet telephony system. [Explanation of symbols]

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 ... ADSL line, 12 ... Splitter, 13 ... ADSL modem with built-in router, 14 ... IP line, 15 ... Public (analog) line, 20 ... Packet telephone system corresponding to blackout, 30 ... LAN relay device, 31, 31-1 to 31 -N ... LAN interface unit, 32, 321-32m ... Line selector unit, 32-1-1-n ... Loop detection unit, 32-p ... Switch relay unit, 32-q ... Direct port switch, 33 ... Constant voltage Circuit unit 34... Central control unit (CPU) 35. Power supply unit 36. DC detection unit 37-1 to 37-n Connector 3 RJ-45 40-1 to 40-n UTP cable 45 ... Public (analog) line accommodation device, 50-1 to 50-n ... IP telephone with direct power failure, 51 ... Connector (RJ-45), 52 ... Electric circuit part, 53 ... LAN interface 54 ... Central control unit, 55 ... Expansion / compression unit, 56 ... D / A, A / D unit, 57 ... Call interface unit, 58 ... DC detection unit, 59 ... Power supply unit, 60 ... Power failure (analog) circuit unit , 61 ... Rectifier circuit part, 62 ... Constant voltage circuit part, 63 ... Dial control part, 64 ... Call interface part, 65 ... Switching relay part, 66 ... Transmission / reception part.

Claims (2)

A power failure-capable packet telephone system comprising a line relay device accommodating a packet communication line and a telephone line having power supply capability and a plurality of packet telephones,
The line relay device includes : a line switching unit that connects any of the plurality of packet telephones to a telephone line having the power supply capability when the power supply unit included in the own line relay device stops; Means for prohibiting connection between the telephone line and a packet telephone other than one of the packet telephones connected to the line;
The packet telephone has a power failure operation circuit that operates by receiving power from the telephone line having the power supply capability in the event of a power failure, and a transmitter / receiver switching unit that switches a transmission / reception unit included in the packet telephone to the power failure operation circuit side in the event of a power failure A packet telephone system for power failure. The packet telephone system for power failure according to claim 1 ,
The line relay device and the packet telephone are connected via a cable having four or more core wires, and the core wire that connects the packet telephone to the telephone line having the power feeding capability is connected to the packet communication line of the cable. A power failure-capable packet telephone system , characterized by being a core wire other than a predetermined core wire.

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