JP3608910B2 - Telephone network subscriber side fixed terminal equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
According to the present invention, in a telephone network in which a subscriber line portion is constructed by a wireless line such as a PHS wireless local loop system (hereinafter referred to as a PHS-WLL system), a fixed installed on the subscriber side of the telephone network. It relates to a terminal device.
[0002]
[Prior art]
Currently, a simple mobile phone system called PHS (Personal Handyphone System) is rapidly expanding. In PHS, small radio base stations are arranged at various locations in a service area, and the area is divided into microcells having a radius of about 100 to several hundreds of meters. In each microcell, a subscriber communicates with a radio base station that is responsible for the microcell by a PHS terminal via a radio channel, and the radio base station and the communication partner are connected by a public network such as an ISDN line.
[0003]
In this PHS, since the area shared by each radio base station is a small area called a micro cell, the transmission power of the radio base station may be small, so that it can be miniaturized and the cost of facilities and construction can be reduced. . Further, even if the same frequency is used in different microcells, there is an advantage that the number of users that can be accommodated in a predetermined frequency band can be increased because problems such as interference are unlikely to occur.
[0004]
The PHS-WLL system is a telephone communication network newly proposed by applying such advantages of PHS. FIG. 5 is a schematic system configuration diagram of an example of the PHS-WLL system. The central office switch is connected to the carrier network 4. The office switch 2 is connected to an access controller 6 for WLL (hereinafter abbreviated as WAC), and a PCM (Pulse Code Modulation) signal transmitted at 64 kbps is a 32 kbps ADPCM (Adaptive Differential PCM) signal at the WAC 6. And is transmitted to a WLL cell station 10 (hereinafter abbreviated as WCS) corresponding to a PHS base station through an optical cable or a wireless line 8.
[0005]
On the other hand, a subscriber installs a telephone network subscriber side fixed terminal device called a WLL subscriber unit 12 (hereinafter abbreviated as WSU) in a building such as a home or office, and the subscriber is connected to the fixed terminal device. A telephone (others may be a facsimile terminal, a computer, etc.) 14 is connected by a wiring cable.
[0006]
The PHS-WLL system applies PHS to the line between the WCS 10 and the WSU 12. That is, WCS 10 and WSU 12 are, for example, time division multiple access (TDMA) using radio waves with a frequency of about 1 to 3 GHz. Therefore, a 32-kbps ADPCM signal addressed to a certain subscriber transmitted to the WCS 10 is transmitted in a time division multiplexed manner with, for example, signals addressed to other subscribers. WSU 12 receives this and performs processing such as extracting a signal addressed to itself.
[0007]
FIG. 6 is a schematic diagram showing a WSU installed in a subscriber's house. As described above, since the radio wave transmitted and received between WCS 10 and WSU 12 has a frequency of, for example, a quasi-microwave band, antenna 20 of WSU 12 has directivity and is installed toward WCS 10. Since this antenna 20 is installed outdoors, it can be stored in the antenna protection case 22 in order to avoid the influence of weather and the like, specifically, to avoid damage to the antenna due to wind and rain, snow accumulation, and salt damage on the coast. It is considered.
[0008]
The WSU main body 24 is installed in the subscriber's house and operates using, for example, a 100 V commercial power source. The WSU main body 24 and the antenna 20 are connected by a coaxial cable 26 that easily transmits a high-frequency signal. A telephone 28 and the like are connected to the WSU main body 24 by a two-wire cable 30.
[0009]
FIG. 7 is a schematic block diagram showing the configuration of a conventional WSU. The WSU main body 24 is mainly composed of a radio unit 40 that performs transmission / reception of radio signals and modulation / demodulation of TDMA signals, a subscriber interface unit 42 that modulates radio signals or processes baseband signals demodulated from radio signals, and controls them. The control unit 44 for performing the above and the power supply unit 46 for supplying power to them are built in one housing. The radio unit 40 and the antenna 20 are connected by a coaxial cable with little loss of high-frequency signals. The control unit 44 controls them via a bus connected to the radio unit 40 and the subscriber interface 42. In general, the radio unit 40 and the subscriber interface 42 are connected using four or more signal lines in order to simultaneously perform bidirectional signal transmission between transmission and reception. On the other hand, the subscriber interface 42 and the telephone 28 are connected by a two-wire cable in accordance with the specifications on the telephone 28 side.
[0010]
The control unit 44 also controls a light emitting diode (LED) for displaying the operating state of the WSU. Further, a switch for setting the operation mode and a connector for connecting a maintenance console for operation inspection are provided on the casing of the WSU main body, and these are connected to the control unit 44.
[0011]
The power supply unit 46 includes a converter that converts commercial AC power into DC, and a battery that backs up operation in the event of a power failure.
[0012]
[Problems to be solved by the invention]
As described above, the main body of the conventional WSU is installed in the home. The WSU main body 24 and the antenna 20 are connected by a low-loss coaxial cable, but the loss is not so small, depending on the distance from the antenna 20 to the indoor and the distance from the indoor pull-in location to the WSU main body. There is a problem that the transmission quality is deteriorated due to increase. On the other hand, in order to avoid this problem, if the WSU main unit is installed as close as possible to the location where the coaxial cable is drawn indoors, and the wiring distance of the coaxial cable indoors is shortened, the installation location of the WSU main unit is restricted. Cause problems.
[0013]
There is also a problem that the WSU main body is not sufficiently small and light. Therefore, for example, when mounting the WSU body on an indoor wall, the strength of the wall must be taken into account, which may cause other constraints on the installation location and special considerations and labor for installation work. There was a problem that could be. In addition, there is an opinion that the existence of such a device indoors impairs the aesthetics of the room, especially for individual subscribers, and that there is a problem in arranging furniture etc. It was.
[0014]
In addition, in order to perform maintenance of WSU, etc., it is necessary to connect a maintenance console to the indoor WSU main body, and maintenance work must be adapted to the convenience of the subscriber, and there is a problem that the efficiency of the maintenance work is poor. .
[0015]
The present invention has been made to solve the above-described problems. In particular, the loss of high-frequency signals from the antenna to the WSU main body is reduced to improve the communication quality, and the WSU installation work and maintenance work are facilitated. It is an object of the present invention to provide a telephone network subscriber side fixed terminal device.
[0016]
[Means for Solving the Problems]
The telephone network subscriber-side fixed terminal apparatus according to the present invention is a telephone network subscriber-side fixed terminal that is installed in a subscriber's house and connects a subscriber telephone to the subscriber line in a telephone network in which the subscriber line is constructed by radio. A terminal device, Installed outside the subscriber's house, An antenna unit comprising the wireless transmission / reception antenna and connected to the subscriber line via the transmission / reception antenna; Installed in the subscriber's house, A subscriber line unit that includes a subscriber line termination circuit that terminates the subscriber line and is connected between the antenna unit and the subscriber telephone, wherein the antenna unit performs modulation and demodulation to generate a radio frequency; A radio circuit unit that mutually converts a signal and a baseband signal, and the transmission / reception antenna are provided close to each other, and the subscriber premises unit is configured to output the baseband signal and an input / output signal from the subscriber telephone. A baseband circuit unit that performs conversion is incorporated.
[0017]
In the telephone network subscriber side fixed terminal apparatus according to the present invention, the antenna unit and the subscriber premises unit convert a transmission signal between the radio circuit unit and the baseband circuit unit into a two-wire transmission system. Each has an interface circuit, and the antenna unit and the subscriber house unit are connected by a two-wire cable.
[0018]
In the telephone network subscriber side fixed terminal device according to the present invention, the antenna unit includes a control circuit unit that controls the radio circuit unit and the baseband circuit unit, and the two-wire cable includes the baseband. It is intended to transmit a control signal between the circuit unit and the control circuit unit.
[0019]
In the telephone network subscriber-side fixed terminal device according to the present invention, the antenna unit includes a power supply unit that supplies power to the radio circuit unit and the baseband circuit unit, and the baseband circuit unit is connected to the power supply unit. Power is fed to the signal superimposed on the signal transmitted on the wiring connecting the antenna unit and the subscriber premises unit.
[0020]
The telephone network subscriber-side fixed terminal apparatus according to the present invention has a connector to which the antenna unit is connected to a maintenance console when the apparatus is inspected.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
[0022]
[Embodiment 1]
FIG. 1 is a schematic diagram of a subscriber's house in which a WSU according to the first embodiment of the present invention is installed. The WSU according to the present invention is mainly composed of an antenna unit 50 installed outside a subscriber's house, for example, on the outer wall or rooftop of a building, and an indoor unit (subscriber house unit) 52 installed, for example, indoors in the subscriber's house. Consists of.
[0023]
The antenna unit 50 incorporates an antenna 62 and an outdoor circuit unit 64 in an antenna protection case 60. Since the radio wave transmitted and received between WCS and WSU has a frequency of, for example, a quasi-microwave band, antenna antenna 62 has directivity and is installed toward WCS. The antenna 62 having directivity has, for example, a structure in which a plurality of rod-shaped beam elements are combined. On the other hand, the antenna protection case 60 is configured in a shape that encloses the entire antenna 62, for example, a cylindrical shape. That is, there is a considerable proportion of gaps in the space inside the antenna protection case 60. The outdoor circuit unit 64 is accommodated in a position in the gap that does not impair the function of the antenna 62. Therefore, the antenna unit 50 does not need to be increased in size in order to accommodate the outdoor circuit unit 64, and can maintain the same small shape as the conventional antenna unit.
[0024]
The outdoor circuit unit 64 includes a radio unit that performs mutual conversion between a high-frequency signal used for radio and a signal (baseband signal) of a frequency that is used in low-frequency normal signal processing. . That is, since the signal between the antenna unit 50 and the home unit 52 is not a high-frequency signal, it is not necessary to connect both units with a coaxial cable, and the two units can be connected with a two-wire cable 66, for example.
[0025]
The in-home unit 52 is connected to an indoor commercial 100V power source, for example, and each part of the apparatus is driven by a predetermined DC voltage generated from this power source. The home unit 52 is connected to a telephone 68 via a two-wire cable.
[0026]
FIG. 2 is a schematic block diagram of the WSU according to the first embodiment of the present invention. The outdoor circuit unit 64 housed in the antenna unit 50 includes a wireless unit 80 (wireless circuit unit), a home unit interface unit 82, and a control unit 84. On the other hand, the home unit 52 includes a subscriber interface unit 90 (baseband circuit unit), an outdoor unit interface unit 92, a control unit 94, and a power supply unit 96.
[0027]
The radio unit 80 is connected to the antenna 62 with a coaxial cable with little loss of high-frequency signals. However, by housing the outdoor circuit unit 64 in the antenna unit 50, the length of the coaxial cable is suppressed to be extremely short. Therefore, the signal transmission loss in this portion becomes so small that it can be ignored.
[0028]
The radio unit 80 responsible for the main function of the outdoor circuit unit 64 includes a transmission / reception circuit 90, a modem circuit 92, and a TDMA control circuit 94. The transmission / reception circuit 90 includes a transmitter, a receiver, a synthesizer, and the like. The transmission / reception circuit 100 basically performs mutual frequency conversion between a high-frequency signal and a baseband signal used for wireless transmission. The modulation / demodulation circuit 102 performs modulation / demodulation using a pseudo noise (PN) code. That is, at the time of reception, for example, the modem circuit 102 demodulates the signal scrambled with the PN code and extracts the signal. The TDMA control circuit 104 is a circuit that performs control for transmission by the TDMA system. For example, at the time of reception, the TDMA control circuit 104 performs processing such as taking out a slot addressed to itself from slots that are time-division multiplexed and transmitting, and removing only a transmission data by removing a synchronization signal that matches the frame timing. .
[0029]
On the other hand, the subscriber interface unit 90 responsible for the main function of the in-house unit 52 includes an ADPCM encoder / decoder 110, a subscriber circuit (SLIC) 112, and a power feeding circuit 114. For example, the ADPCM encoder / decoder 110 converts the ADPCM signal extracted by the radio unit 80 into a linear PCM signal at the time of reception, and performs the reverse process at the time of transmission.
[0030]
It is necessary to connect the subscriber interface unit 90 and the telephone 68 with a two-wire cable according to the specifications of the conventional telephone 68. The SLIC 112 performs an interface between the WSU and the telephone 68. The SLIC 112 performs conversion between two lines and four lines and supplies power to the telephone 68. This power supply is performed by superimposing, for example, a -48V DC voltage generated by the power supply circuit 114 on a two-wire signal to the telephone set 68.
[0031]
Now, since the radio unit 80 of the outdoor circuit unit 64 and the subscriber interface unit 90 of the in-house unit 52 respectively perform transmission processing and reception processing in parallel, the internal processing is directly performed as it is in the outdoor circuit unit 64 and in-house unit 52. In order to transmit data to and from each other, a 4-wire cable is required. However, in this apparatus, the outdoor circuit unit 64 and the in-house unit 52 are configured to be connected by the two-wire cable 66. Therefore, a circuit for interfacing the wireless unit 80 and the subscriber interface unit 90 with the two-wire cable is necessary. It is. The in-home unit interface unit 82 and the outdoor unit interface unit 92 are interface circuits that perform such 2-wire to 4-wire conversion, respectively. These interface units 82 and 92 have multiplexing / demultiplexing circuits 122 and 124 and echo cancellers 126 and 128, respectively, and perform multiplexing and demultiplexing of transmission / reception data and control signals, which are conventionally used. .
[0032]
In this apparatus, the reason why the antenna unit 50 (that is, the outdoor circuit unit 64) and the in-house unit 52 are connected by the two-wire cable 66 is that the indoor wiring of the telephone is usually performed by the two-wire cable. This is because, when there is an existing two-wire indoor wiring, it can be used for connection between the outdoor circuit unit 64 and the home unit 52. Therefore, a configuration in which the indoor unit interface unit 82 and the outdoor unit interface unit 92 are unnecessary is possible by connecting the outdoor circuit unit 64 and the indoor unit 52 with a cable such as a four-wire cable.
[0033]
The power supply circuit 120 provided in the outdoor unit interface unit 92 supplies power from the home unit 52 to the outdoor circuit unit 64. The power feeding circuit 120 generates a DC voltage of, for example, several volts required for driving the outdoor circuit unit 64, and this is superimposed on the signal of the two-wire cable 66 and supplied to the outdoor circuit unit 64.
[0034]
The control unit 84 provided in the outdoor circuit unit 64 controls the wireless unit 80 and the home unit interface unit 82 described above via a bus. Similarly, the control unit 94 provided in the home unit 52 controls the above-described subscriber interface unit 90 and the outdoor unit interface unit 92 via a bus.
[0035]
The control unit 84 of the outdoor circuit unit 64 has an interface for connecting a maintenance console. Thus, by providing the interface for the maintenance console in the outdoor circuit unit 64, the maintenance worker can perform maintenance without entering the subscriber's house. That is, the maintenance worker can inspect the operation state of the apparatus by connecting a maintenance console to the antenna unit 50 attached to, for example, the outer wall of the subscriber's house and performing a return test with the telephone 68 or the like.
[0036]
On the other hand, the control unit 94 of the home unit 52 includes a light emitting diode (LED) for displaying the operating state of the WSU and a switch for setting the operation mode and the like. These LEDs, switches, and the like are disposed, for example, in the housing of the home unit 52. The subscriber can grasp the normal / abnormal state of the device from the lighting state of the LED, etc., so the setting can be changed by operating the switch, or the telephone operator can be contacted for inspection and repair by the maintenance worker. Can be performed as necessary.
[0037]
The subscriber interface unit 90 and the telephone set 68 are connected by a two-wire cable in accordance with the specifications of the conventional telephone set 68.
[0038]
The power supply unit 96 provided in the home unit 52 includes a converter that converts commercial AC power into DC and a battery that backs up the operation in the event of a power failure.
[0039]
According to the configuration of the WSU described above, the wireless unit 80 is separated from the subscriber interface unit 90 and stored in the gap of the antenna unit 50, so that the in-house unit 52 is reduced in size and weight, and wiring by the coaxial cable is performed. Can be eliminated. That is, the transmission loss of the high frequency signal is suppressed by eliminating the coaxial cable wiring, and the communication quality is improved. Further, since the in-house unit 52 has been reduced in size and weight, the antenna unit 50 and the in-house unit 52 are connected by a two-wire cable, and the restriction that the wiring distance of the coaxial cable has to be suppressed is released, the in-house unit The restriction on the mounting position of the unit 52 is relieved remarkably. Specifically, it can be installed in a place away from the place where it is drawn indoors from the outside, or can be installed in a place where the strength of the wall is weak, for example, without reinforcement. In relation to the arrangement of furniture and the like, the home unit 52 can be placed in the empty space after the position of the furniture or the like is first determined.
[0040]
Further, by reducing the volume of the circuit accommodated in the home unit 52, the degree of freedom in the shape of the home unit 52, for example, can be increased, and the device can be designed more favorably for the subscriber. Become.
[0041]
Further, as already described, the wiring between the antenna unit 50 and the home unit 52 is not a coaxial cable but a two-wire cable, so that the existing two-wire cable used in the conventional telephone system is used. If there is, you can divert it. In addition, when newly wiring, the two-wire cable is thinner and flat compared to the coaxial cable, so it is not noticeable even if the wall is turned. There is no obstacle to traffic or traffic.
[0042]
Since the outdoor circuit unit 64 is housed in the antenna protection case 60 and integrally configured as the antenna unit 50, it is not necessary to install the outdoor circuit unit 64 and the antenna 62 separately, and installation work outdoors is facilitated. In addition, since a maintenance console can be connected to the outdoor circuit unit 64 to inspect the apparatus, it is not necessary to enter the subscriber's house and maintenance work is facilitated.
[0043]
[Embodiment 2]
The schematic configuration of the WSU according to the second embodiment of the present invention is the same as that of the above-described embodiment shown in FIG. That is, this apparatus is also configured by being divided into the antenna unit 50 and the home unit 52. Concerning the present apparatus described below, the same components as those in the above-described embodiment are denoted by the same reference numerals, and the description will be simplified.
[0044]
The configuration of this apparatus is basically the same as that of the above embodiment. The difference is that in this apparatus, the home unit 52 is controlled by the control unit 84 provided in the outdoor circuit unit 64. FIG. 3 is a schematic block diagram of the home unit 52 of the present apparatus. Since the control unit 84 controls the home unit 52, the control unit 94 of the home unit 52 that existed in the above embodiment does not exist in the present apparatus, and the home unit 52 is further reduced in size. Weight reduction can be achieved.
[0045]
Signal transmission between the control unit 84 of the outdoor circuit unit 64 and the home unit 52 is performed via the home unit interface unit 82, the outdoor unit interface unit 92, and the two-wire cable 66. That is, the control signal from the control unit 84 is multiplexed with another data signal transmitted / received to / from the wireless line at the home unit interface unit 82 and output to the two-wire cable 66. In the outdoor unit interface unit 92, the control signal separated by the multiplexing / demultiplexing circuit 224 from the signal received from the two-wire cable 66 controls the ADPCM encoder / decoder 110, the LED, and the like.
[0046]
[Embodiment 3]
Hereinafter, the WSU according to the second embodiment of the present invention will be described. This device is also divided into an antenna unit and a home unit. Concerning the present apparatus described below, the same components as those in the above-described embodiment are denoted by the same reference numerals, and the description will be simplified.
[0047]
FIG. 4 is a schematic block diagram of this apparatus. The basic configuration of this apparatus is basically the same as that of the second embodiment. The difference is that a power supply unit 96 that supplies power to the apparatus is provided in the outdoor circuit unit 302 instead of the in-home unit 300. The power supply unit 96 provided in the outdoor circuit unit 302 is housed in the space using a gap space in the antenna protection cover. Thereby, the home unit 300 is further reduced in size and weight.
[0048]
Since the power supply unit 96 is provided in the outdoor circuit unit 302, the power plug is taken out from the antenna unit 304, and is inserted into a power outlet provided on the outer wall of the building, for example.
[0049]
Note that, as in the second embodiment, this apparatus is configured to control the home unit 300 from the control unit 84 of the outdoor circuit unit 302. However, the configuration in which the power supply unit 96, which is a feature of the present apparatus, is provided on the antenna unit 304 side to reduce the size of the home unit 300 is the same as the configuration in which the home unit 52 has the control unit 94 as in the first embodiment. It is possible to apply.
[0050]
【The invention's effect】
According to the telephone network subscriber-side fixed terminal device of the present invention, the wireless circuit unit is housed in the antenna unit, thereby reducing the size and weight of the home unit and greatly reducing the wiring using the coaxial cable. An effect is obtained that signal transmission loss is suppressed and communication quality is improved. The restriction on the installation position of the home unit is greatly eased by reducing the size of the home unit and the need to reduce the wiring distance between the antenna unit and the home unit with a coaxial cable. There is an effect that. Specifically, it can be installed in a place away from the place where it is drawn indoors from the outside, or can be installed in a place where the strength of the wall is weak, for example, without reinforcement. Furthermore, since the radio circuit unit is housed in the antenna protection case and integrally formed as an antenna unit, an effect of facilitating outdoor installation work can be obtained.
[0051]
According to the telephone network subscriber side fixed terminal apparatus of the present invention, the antenna unit and the home unit each have an interface circuit for converting a transmission signal between them into a two-wire transmission system. As a result, if there is an existing two-wire cable used in the conventional telephone system, the antenna unit and the home unit can be installed by using the existing two-wire cable, and the installation work is simplified. .
[0052]
According to the telephone network subscriber-side fixed terminal device of the present invention, the antenna unit is provided with the control circuit unit for controlling the in-house unit, so there is no need to provide the control circuit unit in the in-house unit, and the in-house unit is further reduced in size. The effect which can be reduced in weight is acquired.
[0053]
According to the telephone network subscriber side fixed terminal device of the present invention, the antenna unit is provided with the power supply unit, and the power supply to the home unit is superimposed on the signal transmitted on the wiring connecting the antenna unit and the home unit. As a result, it is not necessary to provide a power supply unit in the home unit, and the effect of further reducing the size and weight of the home unit is obtained.
[0054]
According to the telephone network subscriber-side fixed terminal device of the present invention, the antenna unit 50 has a connector to which a maintenance console is connected, and the maintenance worker can inspect the device without entering the subscriber's house. Thus, an effect of facilitating maintenance work can be obtained.
[Brief description of the drawings]
FIG. 1 is a schematic diagram of a subscriber's house in which a WSU according to a first embodiment of the present invention is installed.
FIG. 2 is a schematic block configuration diagram of a WSU according to the first embodiment of the present invention.
FIG. 3 is a schematic block diagram of a home unit of a WSU according to a second embodiment of the present invention.
FIG. 4 is a schematic block diagram of a WSU according to a third embodiment of the present invention.
FIG. 5 is a schematic system configuration diagram of an example of a PHS-WLL system.
FIG. 6 is a schematic diagram of a subscriber's home where a conventional WSU is installed.
FIG. 7 is a schematic block diagram of a conventional WSU.
[Explanation of symbols]
50,304 antenna unit, 52,300 in-house unit, 60 antenna protection case, 62 antenna, 64,302 outdoor circuit section, 66 2-wire cable, 68 telephone, 80 radio section, 82 in-house unit interface section, 84, 94 control section , 90 Subscriber interface unit, 92 Outdoor unit interface unit, 96 Power supply unit, 100 Transmission / reception circuit, 102 Modulation / demodulation circuit, 104 TDMA control circuit, 110 ADPCM encoder / decoder, 112 SLIC, 114, 120 Power supply circuit, 122, 124 Multiplexing / demultiplexing circuit, 126, 128 Echo canceller.

Claims (5)

In a telephone network in which a subscriber line is constructed by radio, a telephone network subscriber-side fixed terminal device that is installed in a subscriber's house and connects a subscriber telephone to the subscriber line,
An antenna unit installed outside the subscriber's house, including the wireless transmission / reception antenna, and connected to the subscriber line via the transmission / reception antenna;
A subscriber line unit that is installed indoors in the subscriber house, includes a subscriber line termination circuit that terminates the subscriber line, and is connected between the antenna unit and the subscriber telephone;
The antenna unit includes a radio circuit unit that performs modulation / demodulation to mutually convert a radio frequency signal and a baseband signal, and the transmission / reception antenna close to each other,
The subscriber house unit has a built-in baseband circuit unit that performs conversion between the baseband signal and an input / output signal at the subscriber telephone;
A telephone network subscriber-side fixed terminal device. The antenna unit and the customer premises unit each have an interface circuit that converts a transmission signal between the radio circuit unit and the baseband circuit unit into a two-wire transmission system,
The antenna unit and the subscriber premises unit are connected with a two-wire cable;
The telephone network subscriber-side fixed terminal device according to claim 1. The antenna unit is
A control circuit unit configured to control the radio circuit unit and the baseband circuit unit, and the two-wire cable is for transmitting a control signal between the baseband circuit unit and the control circuit unit And
The telephone network subscriber-side fixed terminal device according to claim 2. The antenna unit is
A power supply unit that supplies power to the radio circuit unit and the baseband circuit unit, and the power supply from the power supply unit to the baseband circuit unit is a wiring that connects the antenna unit and the customer premises unit To be superimposed on the signal transmitted above,
The telephone network subscriber-side fixed terminal device according to any one of claims 1 to 3, wherein: 5. The telephone network subscriber side fixed terminal device according to claim 1, wherein the antenna unit has a connector to which a maintenance console is connected when the device is inspected.

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