JPS5985171A - State informing method of commercial power supply - Google Patents

Abstract

PURPOSE:To attain high speed informing by transmitting the state change of a commercial power supply as the state change of a specific bit in a digital signal converted into a frame, in a digital telephone set to which both station power supply and the commercial power supply are applied. CONSTITUTION:The data of information channel and signal channel are multiplexed by converting the form into a frame between a customer station controller 2 and a digital telephone set 5 or devices 6, 7 (not telephone set). The information PS of on/off of the commercial power supply is assigned to the 4th bit F4 of a frame bit train of multi-frame constitution. In transmitting the bit F4 as (0) from the customer station controller G to a digital telephone set H at the commercial power supply, the telephone set 5 receives it and discriminates as the parallel feeding of the station and commercial power supply, and if a service interruption of the commercial power supply takes place at a time t1, the controller 2 sets the bit F4 to (1). Then, the telephone set 5 can discriminate the service interruption of the commercial power supply after the time t1.

Description

[Detailed Description of the Invention] This invention operates by supplying both local power and commercial power, and is capable of controlling the power supply status of commercial power to a telephone that is connected to a digital telephone network (hereinafter referred to as a digital telephone). This relates to a method for notifying the status of commercial power sources.

In the past, communication carried out via subscriber lines was mainly voice calls, but in recent years the types of cleaning jobs being transmitted have increased, and various forms of services have been required.In order to meet this demand, digital communication networks have been developed. It is considered.

FIG. 1 is a block diagram showing an example of a subscriber device connected to a digital communication network. In the figure, 1 is a subscriber line, 2 is a home control device, 3 is a line termination section, 4 is a home control section, 5 is a digital telephone for telephone communication, and 6 is a home control device.
．． 7 is a non-telephone device for conducting non-telephone communications 3;
Of these, the line termination section 3 terminates the subscriber line 1, decomposes the multiplexed signal supplied to the line termination section 3 into two information channels and two signal channels, and handles signals in the opposite direction. performs the opposite operation. In addition, the in-home control unit 4 can use two information channels simultaneously, switch one information channel to telephone communication and non-telephone communication, and divide one information channel to simultaneously use telephone communication and non-telephone communication. Controls complex communication such as divided use. Note that the line termination unit may be separated from the 3Fi home control device 2 and configured as an independent line termination device. In this case, digital telephones and non-telephone devices can be directly connected to the line termination device, and in that case, will provide stand-alone services for digital telephones or non-telephone devices. In this way, the in-home system can be freely configured from a single-use service to a complex communication service according to the user's request, and the portability of equipment installed in the home is improved.

In the configuration shown in FIG. 1, a transmission method is used in which data on an information channel and a signal channel are framed and the frames are multiplexed between the home control device 2 and a digital telephone or non-telephone device. Figure 2 shows an example of how a transmission frame is constructed when a multi-7 frame transmission system is used for this transmission system.As shown in (a), the frame bit F consists of 1 bit, the information bit B consists of 8 bits, and The basic frame is a total of 10 bits of signal bits D, and one multiframe is constructed by multiplexing n basic frames (n=20 in Figure 2) as shown in (b). .

Among the multiframes configured in this way, the first frame bit Fl is used as the violation bit V necessary to identify the start of the multiframe, but the state of that bit in the other F2 to F20 trenches is Depending on whether it is "1" or "0", it is used, for example, as a synchronization establishment notification (SV) or a switch failure notification (6S). FIG. 2(c) shows a frame bit string from which these frame bits are extracted.

In addition, No. 15 bit D is a signal bit string (DI to D20) of n pieces (n=20) obtained by multi-frame.
A signal frame is formed, and the meaning of the signal is assigned to each unit.

In this way, in an interface that multiplexes information and signals and sends and receives them, the above transmission method specifications and signaling method conditions are collectively called a protocol (communication protocol), and the electrical and physical conditions are defined as shown in Table 1. Generally, the levels are hierarchical: level 1 defines the signal link control conditions, level 2 defines the signal logic conditions, and level 3 defines the signal logic conditions.

And generally frame bit Fti is assigned to level 1 and signal bit D is allocated for level 3.

In addition, the power supply system adopts a station power supply in which the station power supply is supplied to the line termination section 3, and a commercial power supply in which the commercial power supply is supplied to the in-home control section 4 (in some cases, power is supplied in combination with seven commercial stations). The non-telephone devices 6 and 7 are locally powered by a commercial power source. Also,
The digital filling machine 5 operates within the range of the station power supply.
It consists of a telephone basic function section for making calls, an additional function section that realizes advanced services such as an operation section for complex communication that cannot be provided by central power supply, and a speaker reception section. It operates using a combined power supply from seven commercial stations using commercial power and station power.

Therefore, in order to guarantee basic phone functions in the event of a power outage in the commercial power supply, the power supply to the digital telephone 5 from the home control device 2 is switched from the combined seven-commercial power supply to the central power supply in response to a power outage in the commercial power supply. As a method for notifying the power supply status from the home control device 2 to the digital telephone 5 in this way, the following four methods are conceivable.

1) The first method is to notify the power supply status independently of the information being communicated using a multiplexed signal channel (signal channel D in FIG. 2(a)) during communication.

Signal Channel Data As mentioned above, signal meanings are assigned to multiple bits, and in order to ensure the reliability of power supply status notifications, a means to detect bit errors is usually required. becomes. In addition, since it is composed of multiple bits, even after a commercial power outage, the
must be sent. Furthermore, in order to transmit a plurality of bits, a long signal transmission time is required, and for this reason, the power from the commercial power supply must be stored in a large capacitor, which is impractical. In addition, notification of power supply status is generally performed at level 1 of the protocol layer,
Since signal bit D is used, it is assigned to level 3, and commonality with other devices cannot be achieved.

2) As shown in Fig. 3, the second method uses two power supply units 8 for commercial system power supply and power supply unit 9 for local power supply with different input polarities in digital telephone 5, and performs in-home control. Normally, power is supplied from the device w2 only by the commercial power supply unit 10, turning on the power supply unit 9, operating both the telephone basic function unit 12 and the additional function unit 13 of the digital telephone 5, and when there is a power outage, the commercial power supply unit 10 Local power supply section 1 whose polarity is opposite to that of
1, turn on the ILE source unit 8 of the telephone 5, and operate only the telephone basic function section 12.

This method requires two power supply units for the digital telephone 5, the switching of the power supply, the reversal of polarity, which causes momentary power outages, and the need for countermeasures, and the fact that the line termination section 3 is used as an independent device. The digital telephone 5 cannot be connected to a separate line termination device. i.e. digital phone &5
There are drawbacks such as the portability of the data is not guaranteed.

3) The third method is to provide a new signal line between the home control device 2 and the digital telephone 5 as a means of notifying the on/off of the commercial power supply.
There are disadvantages that the number of connection lines between the digital telephone 5 and the digital telephone 5 increases, and the portability of the digital telephone 5 cannot be guaranteed.

4) The fourth method is to provide a power supply line from a commercial power source between the home control device 2 and the digital telephone 5, and to determine whether the commercial power source is turned on or off by the digital telephone 5.

Similar to the third method, this method also has the drawbacks that the number of connection lines between the home control device 2 and the digital telephone 5 increases and that the vokability of the digital telephone 5 cannot be guaranteed.

As described above, all of the above four methods have drawbacks such as poor portability of digital telephones and poor economic efficiency.

Therefore, it is an object of the present invention to provide a commercially available i
The purpose of this invention is to provide a method for notifying the status of s.

In order to achieve such an object, the present invention allocates on/off information of a commercial power source to frame bits. The present invention will be described in detail below using drawings showing embodiments.

FIG. 4 shows an embodiment of the present invention in which a multi-frame configuration is adopted as a 7-frame format for transmission between a home control device and home equipment accommodated in the home control device, and FIG. The commercial power supply on/off information PS is assigned to bit F4, which is the fourth bit of the shown frame bit string.

FIG. 5 is a diagram for explaining the operation. When the commercial power supply is supplied, bit F4 of the frame bits is transmitted from the home control unit G side to the digital telephone H side as "0". When the digital telephone 5 receives the data of bit F4=l-OJ, it is determined that the power is being fed in combination with 7 commercial stations. You can know something. When a power outage occurs in the commercial power supply at time t1, the home control device 2 sets bit F4 to "1".
The digital telephone 5 can detect this and know that the commercial power supply will be out of power after time t1.

Note that the configuration of the multiframe is not limited to 20 multiframes, and the same is generally true for m multiframes, and the frame bits representing the status notification information of the commercial power source are not limited to the pipbF4 bits.

FIG. 6 shows an embodiment of the present invention in a single frame configuration, in which a specific pin 1 in the ITI bits (FIG. 6 is m-8) constituting the flag pattern FP added to the beginning of the transmission frame. Commercially unknown 1 source on/off information P
The operation at this time is the same as that shown in FIG. 5.

In this way, commercial type? digital telephone as No. 18 of level 1 of the O1-col layer. 5, the status of the commercial power supply can be transmitted just by a change in the status of a specific bit, ensuring sufficient reliability. Since the number is 1 bit, the digital telephone 5
prompt processing can be encouraged. Furthermore, the hardware that implements this notification method is in addition to conventional hardware such as transmitting and receiving frame counters that count the number of frames for multi-frame control and logic circuits that identify each frame bit. The control device 2 is equipped with a 70-type flip that can retain and rewrite the contents of bit F4, and the digital telephone 5 only requires the addition of a logic circuit to identify bit F4, and requires only a small amount of hardware. It only needs to be added and can be easily implemented.

As explained above, the present invention provides (in communication between a digital telephone and a home control device that frames IY information and signals and sends and receives them, a specific frame of a transmission frame that does not affect the sending and receiving of information and signals). Since this method uses bits to provide on/off information of the commercial power supply and notifies the digital telephone of the power supply status from the home control device, there is no need to install a separate line to notify the status of the commercial power supply.
Further, there is an advantage that it is possible to reduce hardware such as not using two power supply units with different input polarities in a digital telephone. In addition, since it is a method that uses frame bits in terms of protocol, it is organized as a condition of the lowest protocol layer (level 1) that is the basis of communication, similar to synchronization establishment notification, and is expressed as a change in the state of a specific bit. Therefore, it is possible to obtain sufficient reliability compared to the method of notification using g1 of the Pl, L cor layer (level 3) that defines the logical conditions of the signal, and the time required for notification as a signal with a high level of urgency is reduced. and child processing time can be shortened. Furthermore, it has the advantage of guaranteeing the portability of digital telephones without damaging the hierarchical structure of the protocol.

Additionally, if 1J is required for attached devices that require memory backup, the commercial power status notification method described here can be used even in systems that use a combination of commercial power supply and battery power supply. There is also this effect.

[Brief explanation of the drawing]

Figure 1 is a block diagram showing an example of a subscriber device connected to a digital communication network, Figure 2 is a diagram showing an example of a frame configuration, and Figure 3 is an example of a method for notifying the status of a commercial power supply. 4 is a diagram showing a bit frame for explaining one embodiment to which the method of the present invention is applied, FIG. 5 is a diagram for explaining the operating state, and FIG. 6 is a diagram for explaining another embodiment. FIG. 2 is a diagram showing an example-sized bit frame. 2...In-home control equipment, 3rd issue--Line termination section, 4.
. . . In-home control unit, 5. . . Digital telephone, 6.
7...Non-telephone equipment, F...) V-MBIT, B
...Information bit, D...111th bit. Patent applicant: Masaki Yamakawa, agent for Nippon Denki I11 Telephone Public Corporation

Claims (1)

[Claims] It is connected to the subscriber line via the in-home control device, and is supplied with both the station power supplied via the subscriber line and the commercial power supplied from the in-home control device, and is connected to the in-home control device. In a method of notifying the state of a commercial power source to a digital telephone that sends and receives framed digital signals between devices, the state of a specific bit in a digital signal that frames a change in the state of a commercial power source is used. A commercial power supply status notification method characterized by transmitting the status as a change.