CN104518828B

CN104518828B - Seabed branch units and extra large cable terminal device

Info

Publication number: CN104518828B
Application number: CN201310468454.7A
Authority: CN
Inventors: 崔克强; 张立昆; 刘会华
Original assignee: Huawei Marine Networks Co Ltd
Current assignee: HMN Technologies Co Ltd
Priority date: 2013-09-30
Filing date: 2013-09-30
Publication date: 2017-06-06
Anticipated expiration: 2033-09-30
Also published as: CN104518828A

Abstract

The invention discloses a kind of seabed branch units and extra large cable terminal device, belong to optical communication field.The seabed branch units includes：First signal processing unit, secondary signal processing unit, first port, second port, the 3rd port and respectively with the first port, corresponding three photoelectric conversion units of second port and the 3rd port.The present invention obtains control signal and is sent respectively to the first signal processing unit and secondary signal processing unit in passing through the business light that photoelectric conversion unit is input into from corresponding port, the status of electrically connecting of seabed branch units is switched over according to the control signal by the first signal processing unit or secondary signal processing unit, solve in the prior art when a port of seabed branch units only accesses an input optical fibre, signal receives the problem not high with the reliability of process circuit, reach the backup effect for improving signal reception and process circuit, improve the purpose of reliability.

Description

Seabed branch units and extra large cable terminal device

Technical field

The present invention relates to optical communication field, more particularly to a kind of seabed branch units and extra large cable terminal device.

Background technology

Seabed branch units is the important component in Fiber Optical Submarine Cable System, and it includes three ports, respectively with three It is connected with cable by optical cable between individual extra large cable terminal device, with the optic communication for realizing being carried out between three extra large cable terminal devices The transmission of business.Additionally, seabed branch units can also receive the control command of extra large cable terminal device transmission, with the electricity to itself Connection status is switched over.

Because the applied environment of seabed branch units is more special, its signal to internal receipt control command is received and place The reliability requirement for managing circuit is higher, it is generally the case that needs to receive signal and designs one or more sets redundancies with process circuit Backup.

Fig. 1 is referred to, a kind of equipment pie graph of the seabed branch units provided it illustrates background of invention should Seabed branch units includes port a, b and c, and each port can access multipair business optical fiber, and each pair business optical fiber includes one Input optical fibre and an output optical fibre.Additionally, each port on the seabed branch units can access power supply circuit, seabed There are three kinds of basic electrical connection working conditions during branch units normal work, be referred to as ab states, bc states and ac states, seabed branch Unit is receiving extra large cable terminal device by after the control signal that business light in input optical fibre sends, can be in these three bases Any switching laws between this status of electrically connecting.3 ports a, b and c of the seabed branch units respectively with extra large cable terminal device A, B Connected with optical fiber and C between, multipair business optical fiber is accessed in each port, and a1, a2, b1, b2, c1 and c2 shown in figure are respectively The input optical fibre that three ports are accessed.The signal of the seabed branch units is received includes that signal receives single with treatment with process circuit Unit 1 and signal receive and receive and respective photoelectric conversion unit and signal are included in processing unit with processing unit 2, each signal Processing unit, signal is received can obtain control signal with processing unit 1 from the business light of a1, b1 and c1 transmission, and signal connects Receiving can obtain control signal with processing unit 2 from the business light of a2, b2 and c2 transmission.When wherein a set of signal is received and place During reason element failure, extra large cable terminal device can be received to another set of signal and send control signal with processing unit, so as to improve Signal receives the reliability with process circuit.

Realize it is of the invention during, inventor find prior art at least there is problems with：

In existing seabed branch units, cover signal more and receive independent mutually with processing unit, it is necessary in each port point Different input optical fibres are not accessed, and in actual applications, a port in some seabed branch units may only access one Input optical fibre, control is sent so as to cause the corresponding extra large cable terminal device in the port to be received to a set of signal with processing unit Signal, signal receives bad with the backup effect of process circuit, and reliability is not high.

The content of the invention

Receive independent, it is necessary to be connect respectively in each port mutually with processing unit to solve many set signals in the prior art Enter different input optical fibres, when a port in the branch units of seabed only accesses an input optical fibre, signal is received and place The reliability of circuit problem not high is managed, a kind of seabed branch units and extra large cable terminal device is the embodiment of the invention provides.Institute State technical scheme as follows：

First aspect, there is provided a kind of seabed branch units, the seabed branch units includes：First signal transacting list Unit, secondary signal processing unit, first port, second port, the 3rd port and respectively with the first port, second port Three photoelectric conversion units corresponding with the 3rd port；

Described each photoelectric conversion unit includes an input and two output ends；Described each photoelectric conversion unit Input be used for receive from corresponding port be input into business light；Two output ends of each photoelectric conversion unit point It is not connected with first signal processing unit and the secondary signal processing unit；

Described each photoelectric conversion unit, for obtaining control signal from the business light for receiving, and will obtain To the control signal be sent respectively to first signal processing unit and the secondary signal processing unit；The control Include the mark of echo signal processing unit in signal；

First signal processing unit, mark and first signal for detecting the echo signal processing unit Identifying whether for processing unit is identical, if the mark of the mark of the echo signal processing unit and first signal processing unit It is sensible same, then the status of electrically connecting of the seabed branch units is switched over according to the control signal；

The secondary signal processing unit, mark and the secondary signal for detecting the echo signal processing unit Identifying whether for processing unit is identical, if the mark of the mark of the echo signal processing unit and the secondary signal processing unit It is sensible same, then the status of electrically connecting of the seabed branch units is switched over according to the control signal.

In the first possible implementation of first aspect, the photoelectric conversion unit includes：First optical splitter, first Optical filter, the second optical splitter, the first photoelectric switching circuit module, the first demodulator circuit module, the second photoelectric switching circuit mould Block and the second demodulator circuit module；

The input path of first optical splitter is the light path of the business light；The input path of first optical filter It is the emitting light path of first optical splitter；The input path of second optical splitter is the emergent light of first optical filter Road；The input of the input of the first photoelectric switching circuit module and the second photoelectric switching circuit module is respectively at On two emitting light paths of second optical splitter；The output end of the first photoelectric switching circuit module and the described first demodulation The input of circuit module is connected, the output end of the second photoelectric switching circuit module and the second demodulator circuit module Input is connected；The output end of the first demodulator circuit module is connected with the input of first signal processing unit, institute The output end for stating the second demodulator circuit module is connected with the input of the secondary signal processing unit；

First optical splitter, for isolating a part of business light；

First optical filter, for filtering out specified wavelength in the business light isolated from first optical splitter Optical signal；

Second optical splitter, for the optical signal of the specified wavelength to be divided into two-way, is respectively sent to described first Photoelectric switching circuit module and the second photoelectric switching circuit module；

The first photoelectric switching circuit module, for the optical signal that second optical splitter sends to be converted into electric signal And it is sent to the first demodulator circuit module；

The first demodulator circuit module, for the electric signal that the first photoelectric switching circuit module is changed to be demodulated into The control signal is simultaneously sent to first signal processing unit；

The second photoelectric switching circuit module, for the optical signal that second optical splitter sends to be converted into electric signal And it is sent to the second demodulator circuit module；

The second demodulator circuit module, for the electric signal that the second photoelectric switching circuit module is changed to be demodulated into The control signal is simultaneously sent to the secondary signal processing unit.

In second possible implementation of first aspect, the photoelectric conversion unit includes：3rd optical splitter, second Optical filter, the 3rd photoelectric switching circuit module, the 3rd demodulator circuit module and the first photoelectric coupled circuit module；

The input path of the 3rd optical splitter is the light path of the business light；The input path of second optical filter It is the emitting light path of the 3rd optical splitter；The input end of the 3rd photoelectric switching circuit module is filtered in second light On the emitting light path of device；The input of the 3rd demodulator circuit module and the output end of the 3rd photoelectric switching circuit module Be connected, two output ends of the 3rd demodulator circuit module respectively with the input of the first photoelectric coupled circuit module and described The input of the first signal processing unit is connected；The output end of the first photoelectric coupled circuit module is single with secondary signal treatment The input of unit is connected；

3rd optical splitter, for isolating a part of business light；

Second optical filter, for filtering out specified wavelength in the business light isolated from the 3rd optical splitter Optical signal；

The 3rd photoelectric switching circuit module, for the optical signal of the specified wavelength being converted into electric signal and being sent To the 3rd demodulator circuit module；

The 3rd demodulator circuit module, for the electric signal that the 3rd photoelectric switching circuit module is changed to be modulated to The control signal is simultaneously sent respectively to first signal processing unit and the first photoelectric coupled circuit module；

The first photoelectric coupled circuit module, for the control signal to be sent into the secondary signal processing unit.

In the third possible implementation of first aspect, the photoelectric conversion unit includes：4th optical splitter, the 4th Photoelectric switching circuit module, the 4th demodulator circuit module and the second photoelectric coupled circuit module；

The input path of the 4th optical splitter is the light path of the business light；The 4th photoelectric switching circuit module Input end is on the emitting light path of the 4th optical splitter；The input of the 4th demodulator circuit module and the 4th light The output end of power conversion circuit module is connected；Two output ends of the 4th demodulator circuit module respectively with second optocoupler The input of circuit module is connected with the input of first signal processing unit；The output of the second photoelectric coupled circuit module End is connected with the input of the secondary signal processing unit；

4th optical splitter, for isolating a part of business light；

The 4th photoelectric switching circuit module, for the total optical power signal of the business light to be converted into electric signal simultaneously It is sent to the 4th demodulator circuit module；

The 4th demodulator circuit module, for the electric signal that the 4th photoelectric switching circuit module is changed to be demodulated into The control signal is simultaneously sent respectively to first signal processing unit and the second photoelectric coupled circuit module；

The second photoelectric coupled circuit module, for the control signal to be sent into the secondary signal processing unit.

In the 4th kind of possible implementation of first aspect, the photoelectric conversion unit includes：5th optical splitter, the 6th Optical splitter, the 5th photoelectric switching circuit module, the 5th demodulator circuit module, the 6th photoelectric switching circuit module and the 6th demodulation Circuit module；

The input path of the 5th optical splitter is the light path of the business light；The input path of the 6th optical splitter is The emitting light path of the 5th optical splitter；The input of the 5th photoelectric switching circuit module and the 6th opto-electronic conversion electricity The input of road module is respectively on two articles of emitting light paths of the 6th optical splitter；The 5th photoelectric switching circuit module Input be connected with the input of the 5th demodulator circuit module, the output end of the 6th photoelectric switching circuit module with The input of the 6th demodulator circuit module is connected；At the output end of the 5th demodulator circuit module and first signal The input for managing unit is connected, the output end of the 6th demodulator circuit module and the input of the secondary signal processing unit It is connected；

5th optical splitter, for isolating a part of business light；

6th optical splitter, for the business light that the 5th optical splitter is isolated to be divided into two-way, is respectively sent to The 5th photoelectric switching circuit module and the 6th photoelectric switching circuit module；

The 5th photoelectric switching circuit module, the total optical power letter of the business light for the 6th optical splitter to be separated Number be converted to electric signal and be sent to the 5th demodulator circuit module；

The 5th demodulator circuit module, for the electric signal that the 5th photoelectric switching circuit module is changed to be demodulated into The control signal is simultaneously sent to first signal processing unit；

The 6th photoelectric switching circuit module, the total optical power letter of the business light for the 6th optical splitter to be separated Number be converted to electric signal and be sent to the 6th demodulator circuit module；

The 6th demodulator circuit module, for the electric signal that the 6th photoelectric switching circuit module is changed to be demodulated into The control signal is simultaneously sent to the secondary signal processing unit.

Second possible realization side of the first possible implementation, first aspect with reference to first aspect, first aspect 4th kind of possible implementation of formula, the third possible implementation of first aspect or first aspect, in first aspect In 5th kind of possible implementation, first signal processing unit and the secondary signal processing unit have respective volume Number, the address for being designated the seabed branch units and first signal processing unit of first signal processing unit The combination of numbering, the secondary signal processing unit is designated at the address of the seabed branch units and the secondary signal Manage the combination of the numbering of unit.

Second possible realization side of the first possible implementation, first aspect with reference to first aspect, first aspect 4th kind of possible implementation of formula, the third possible implementation of first aspect or first aspect, in first aspect In 6th kind of possible implementation, first signal processing unit and the secondary signal processing unit have respectively Location, the address for being designated first signal processing unit of first signal processing unit, the secondary signal treatment is single The address for being designated the secondary signal processing unit of unit.

Second aspect, there is provided a kind of extra large cable terminal device, the extra large cable terminal device includes：

Modulating unit, for the modulation control signal in business light, includes echo signal treatment in the control signal The mark of unit；

Transmitting element, for the business light of the control signal will to be modulated with by the light that is connected with seabed branch units Fibre is sent to a port in the seabed branch units；The control signal be used for by the seabed branch units with institute The corresponding photoelectric conversion unit in port is stated to be obtained from the business light, and by the first signal in the seabed branch units Reason unit and secondary signal processing unit detect the echo signal processing unit identify whether it is identical with self identification, if inspection The mark for measuring the echo signal processing unit is identical with self identification, then according to the control signal to the seabed branch The status of electrically connecting of unit is switched over.

In the first possible implementation of second aspect, the modulating unit includes：

First modulation subunit, the optical signal of the specified wavelength for being modulated at the control signal in the business light In.

In second possible implementation of second aspect, the modulating unit includes：

Second modulation subunit, for the control signal to be modulated at into the business light by adjusting top mode.

May be realized with reference to the first possible implementation of second aspect, second aspect or second of second aspect Mode, in the third possible implementation of second aspect, the extra large cable terminal device also includes：

Whether detection unit, the corresponding signal processing unit of mark for detecting the echo signal processing unit loses Effect；

The modulating unit, if for the corresponding signal processing unit failure of mark of the echo signal processing unit, New control signal is then modulated in the business light, the mark of new object processing unit is included in the new control signal Know.

The beneficial effect that technical scheme provided in an embodiment of the present invention is brought is：

Photoelectric conversion unit is by obtaining control signal and being sent respectively to the in the business light that is input into from corresponding port One signal processing unit and secondary signal processing unit, by the first signal processing unit or secondary signal processing unit in detection Go out when the identifying identical with the mark of itself of echo signal processing unit included in control signal, according to the control signal to sea The status of electrically connecting of bottom branch unit is switched over, and is solved many set signals in the prior art and is received only mutually with processing unit It is vertical, it is necessary to connect different input optical fibres respectively, when a port of seabed branch units only accesses an input optical fibre, letter Number the problem not high with the reliability of process circuit is received, reaching improves signal and receive backup effect with process circuit, improves The purpose of reliability.

Brief description of the drawings

Technical scheme in order to illustrate more clearly the embodiments of the present invention, below will be to that will make needed for embodiment description Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for For those of ordinary skill in the art, on the premise of not paying creative work, other can also be obtained according to these accompanying drawings Accompanying drawing.

Fig. 1 is the equipment pie graph of the seabed branch units that background of invention is provided；

Fig. 2 is the equipment pie graph of the seabed branch units that one embodiment of the invention is provided；

Fig. 3 is the connection diagram of the photoelectric conversion unit that another embodiment of the present invention is provided；

Fig. 4 is the connection diagram of the photoelectric conversion unit that further embodiment of this invention is provided；

Fig. 5 is the connection diagram of the photoelectric conversion unit that yet another embodiment of the invention is provided；

Fig. 6 is the connection diagram of the photoelectric conversion unit that yet another embodiment of the invention is provided；

Fig. 7 is the equipment pie graph of the extra large cable terminal device that one embodiment of the invention is provided；

Fig. 8 is the equipment pie graph of the extra large cable terminal device that another embodiment of the present invention is provided.

Specific embodiment

To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to embodiment party of the present invention Formula is described in further detail.

Fig. 2 is referred to, the equipment pie graph of the seabed branch units provided it illustrates one embodiment of the invention.The sea It is connected by optical fiber and cable between bottom branch unit and extra large cable terminal device.The seabed branch units can include：First Signal processing unit 102, secondary signal processing unit 104, first port 106, second port 108, the 3rd port 110 and point Not with the first port 106, corresponding three photoelectric conversion units 112 in 108 and the 3rd port of second port 110；

Described each photoelectric conversion unit 112 includes an input and two output ends；Described each opto-electronic conversion The input of unit 112 is used to receive the business light being input into from corresponding port；The two of each photoelectric conversion unit 112 Individual output end is connected with first signal processing unit 102 and the secondary signal processing unit 104 respectively；

Described each photoelectric conversion unit 112, for obtaining control signal from the business light for receiving, and will obtain The control signal got is sent respectively to first signal processing unit 102 and the secondary signal processing unit 104； Include the mark of echo signal processing unit in the control signal；

First signal processing unit 102, the mark and described first for detecting the echo signal processing unit Identifying whether for signal processing unit 102 is identical, if the mark of the echo signal processing unit and first signal transacting The mark of unit 102 is identical, then the status of electrically connecting of the seabed branch units is switched over according to the control signal；

The secondary signal processing unit 104, the mark and described second for detecting the echo signal processing unit Identifying whether for signal processing unit 104 is identical, if the mark of the echo signal processing unit is processed with the secondary signal The mark of unit 104 is identical, then the status of electrically connecting of the seabed branch units is switched over according to the control signal.

In sum, seabed branch units provided in an embodiment of the present invention, photoelectric conversion unit is by from corresponding port Obtained in the business light of input and control signal and be sent respectively to the first signal processing unit and secondary signal processing unit, by the The echo signal processing unit that one signal processing unit or secondary signal processing unit are included in control signal is detected When mark is identical with the mark of itself, the status of electrically connecting of seabed branch units is switched over according to the control signal, solved Many set signals are received with processing unit mutually independently, it is necessary to connect different input optical fibres respectively in the prior art, work as seabed When a port of branch units only accesses an input optical fibre, signal receives the problem not high with the reliability of process circuit, The backup effect for improving signal reception and process circuit is reached, the purpose of reliability is improved.

In seabed branch units shown in above-mentioned Fig. 2, according to extra large cable terminal device in business light modulation control signal The difference of the circuit design inside mode and seabed branch units, photoelectric conversion unit in the branch units of seabed at least can be with With four kinds of different attachment structures.Four kinds of different attachment structures will be illustrated respectively below.

Fig. 2 is referred to, the equipment pie graph of the seabed branch units provided it illustrates another embodiment of the present invention.The sea It is connected by optical fiber and cable between bottom branch unit and extra large cable terminal device.The seabed branch units can include：First Signal processing unit 102, secondary signal processing unit 104, first port 106, second port 108, the 3rd port 110 and point Not with the first port 106, corresponding three photoelectric conversion units 112 in 108 and the 3rd port of second port 110；

Wherein, the first signal processing unit 102 and secondary signal processing unit 104 include 3 inputs respectively, each Photoelectricity is changed and turns two output ends of unit 112 respectively with the 3 of the first signal processing unit 102 and secondary signal processing unit 104 One in individual input is connected.

Additionally, not shown in Fig. 2, each port in the branch units of seabed can access multipair optical fiber, for Input optical fibre in each pair optical fiber, seabed branch units can be corresponded to and design a photoelectric conversion unit 112, and each photoelectricity turns Unit 112 is changed equally to be connected with the first signal processing unit 102 and secondary signal processing unit 104 respectively, so, each port Corresponding extra large cable terminal device can send control signal by different optical fiber to seabed branch units, reach and more preferably back up Effect.Additionally, seabed branch units can be directly connected to extra large cable terminal device, it is also possible to by undersea repeaters or light point Other undersea devices such as insert multiplexer are connected with extra large cable terminal device.

Fig. 3 is referred to, it illustrates the connection diagram of the photoelectric conversion unit described in another embodiment of the present invention, its In, the photoelectric conversion unit 112 includes：First optical splitter 112a, the first optical filter 112b, the second optical splitter 112c, One photoelectric switching circuit module 112d, the first demodulator circuit module 112e, the second photoelectric switching circuit module 112f and second Demodulator circuit module 112g；

The input path of the first optical splitter 112a is the light path of the business light；The first optical filter 112b's Input path is the emitting light path of the first optical splitter 112a；The input path of the second optical splitter 112c is described first The emitting light path of optical filter 112b；The input and second opto-electronic conversion of the first photoelectric switching circuit module 112d The input of circuit module 112f is respectively on two emitting light paths of the second optical splitter 112c；First photoelectricity turns The output end for changing circuit module 112d is connected with the input of the first demodulator circuit module 112e, second opto-electronic conversion The output end of circuit module 112f is connected with the input of the second demodulator circuit module 112g；The first demodulator circuit mould The output end of block 112e is connected with the input of first signal processing unit 102, the second demodulator circuit module 112g Output end be connected with the input of the secondary signal processing unit 104；

The first optical splitter 112a, for isolating a part of business light；

The first optical filter 112b, for filtering out finger in the business light isolated from the first optical splitter 112a Standing wave optical signal long；

Wherein, the control signal is modulated in the optical signal of the specified wavelength by the extra large cable terminal device.Specifically , control signal can be converted to extra large cable terminal device the optical signal of specified wavelength, and the optical signal of the execution wavelength is added It is added in business light.

The second optical splitter 112c, for the optical signal of the specified wavelength to be divided into two-way, is respectively sent to described First photoelectric switching circuit module 112d and the second photoelectric switching circuit module 112f；

The first photoelectric switching circuit module 112d, for the optical signal conversion for sending the second optical splitter 112c For electric signal and it is sent to the first demodulator circuit module 112e；

The first demodulator circuit module 112e, for the telecommunications for changing the first photoelectric switching circuit module 112d Number it is demodulated into the control signal and is sent to first signal processing unit 102；

The second photoelectric switching circuit module 112f, for the optical signal conversion for sending the second optical splitter 112c For electric signal and it is sent to the second demodulator circuit module 112g；

The second demodulator circuit module 112g, for the telecommunications for changing the second photoelectric switching circuit module 112f Number it is demodulated into the control signal and is sent to the secondary signal processing unit 104.

Wherein, first signal processing unit 102 and the secondary signal processing unit 104 have respective numbering, The mark of first signal processing unit 102 can be the address of the seabed branch units and the first signal transacting list Unit 102 numbering combination, the secondary signal processing unit 104 mark can be the seabed branch units address with The combination of the numbering of the secondary signal processing unit 104.

Or,

First signal processing unit 102 and the secondary signal processing unit 104 have a respective address, and described the The mark of one signal processing unit 102 can be the address of first signal processing unit, the secondary signal processing unit 104 mark can be the address of the secondary signal processing unit.

Such as, if the numbering of the first signal processing unit 102 in the branch units of seabed is 0x01, secondary signal treatment is single The numbering of unit 104 is 0x02.When extra large cable terminal device A transmission TURPs change control command, modulation includes seabed in business light The control signal of the numbering 0x01 of the address of branch units and the first signal processing unit 102, the first signal processing unit 102 exists Detect that the address of seabed branch units in the control signal is correct, and numbering is itself numbering 0x01, then according to control letter Number carrying out TURP to seabed branch units changes, such as, status of electrically connecting is switched into ac states by current ab states.And secondary signal Processing unit 104 detects that the address of the seabed branch units in the control signal is correct, but numbering is not itself numbering 0x02, Electrical switching operation is not performed then.

Or, if the first signal processing unit 102 and secondary signal processing unit 104 in the branch units of seabed each have There is the unique address of system, then when extra large cable terminal device A transmissions TURP changes control command, modulation includes first in business light The control signal of the address of signal processing unit 102, what the first signal processing unit 102 was included in the control signal is detected Address is Self address, then carrying out TURP to seabed branch units according to control signal changes.And secondary signal processing unit 104 is examined It is not Self address to measure the address included in the control signal, then do not perform electrical switching operation.

Additionally, in order to improve backup effect, above-mentioned first photoelectric switching circuit module 112d, the first demodulator circuit module 112e and the first signal processing unit 102 can be powered by a power supply unit, the second photoelectric switching circuit module 112f, Two demodulator circuit module 112g and secondary signal processing unit 104 can be powered by another power supply unit, so, even if having one The failure of individual power supply unit, the corresponding photoelectric switching circuit module of another power supply unit and demodulation circuit module can also be obtained normally Control signal.Further, power supply unit can also further be segmented, such as, and the first photoelectric switching circuit module 112d and the first demodulator circuit module 112e are powered by the first power supply unit, and the first signal processing unit 102 is single by the second power supply Unit's power supply, the second photoelectric switching circuit module 112f and the second demodulator circuit module 112g are powered by the 3rd power supply unit, and second Signal processing unit 104 is powered by the 4th power supply unit, so, even if the first power supply unit and the 3rd power supply unit fail, As long as the first signal processing unit 102 or secondary signal processing unit 104 can be with normal works, seabed branch units can be with Control signal is obtained in the input optical fibre accessed from other ports and is processed by the first signal processing unit 102 or secondary signal Unit 104 is electrically connected the switching of state.

Access at least one input optical fibre, every input in seabed branch units provided in an embodiment of the present invention, each port Optical fiber to that should have a photoelectric conversion unit, by any one input optical fibre to the seabed branch units sent out by extra large cable terminal device The control signal sent can be sent to each signal processing unit in the branch units of seabed, when a port only access one it is defeated When entering optical fiber, it is also possible to which seabed branch units is backed up completely, seabed branch units can be improved relative to prior art In signal receive with the backup effect of process circuit, improve reliability.

Additionally, in seabed branch units provided in an embodiment of the present invention, two signal processing units have respective mark. When signal processing unit corresponding with the mark of the echo signal processing unit included in control signal fails, extra large cable terminal sets The standby mark that can directly change the echo signal processing unit in control signal, and amended control signal is modulated at industry After in business light, resend according to original route, you can seabed is divided with by another signal processing unit in the branch units of seabed The status of electrically connecting of Zhi Danyuan is switched over, it is not necessary to complicated software control protocol, and control command modification is simple, reliability It is high.

Fig. 2 is referred to, the equipment pie graph of the seabed branch units provided it illustrates further embodiment of this invention.The sea It is connected by optical fiber and cable between bottom branch unit and extra large cable terminal device.The seabed branch units can include：First Signal processing unit 102, secondary signal processing unit 104, first port 106, second port 108, the 3rd port 110 and point Not with the first port 106, corresponding three photoelectric conversion units 112 in 108 and the 3rd port of second port 110；

Fig. 4 is referred to, it illustrates the connection diagram of the photoelectric conversion unit shown in further embodiment of this invention, its In, the photoelectric conversion unit 112 includes：3rd optical splitter 112h, the second optical filter 112i, the 3rd photoelectric switching circuit mould Block 112j, the 3rd demodulator circuit module 112k and the first photoelectric coupled circuit module 112m；

The input path of the 3rd optical splitter 112h is the light path of the business light；The second optical filter 112i's Input path is the emitting light path of the 3rd optical splitter 112h；The input end of the 3rd photoelectric switching circuit module 112j In on the emitting light path of the second optical filter 112i；The input and the described 3rd of the 3rd demodulator circuit module 112k The output end of photoelectric switching circuit module 112j is connected, two output ends of the 3rd demodulator circuit module 112k respectively with institute The input for stating the first photoelectric coupled circuit module 112m is connected with the input of first signal processing unit 102；Described first The output end of photoelectric coupled circuit module 112m is connected with the input of the secondary signal processing unit 104；

The 3rd optical splitter 112h, for isolating a part of business light；

The second optical filter 112i, for filtering out finger in the business light isolated from the 3rd optical splitter 112h Standing wave optical signal long；

The 3rd photoelectric switching circuit module 112j, for the optical signal of the specified wavelength to be converted into electric signal simultaneously It is sent to the 3rd demodulator circuit module 112k；

The 3rd demodulator circuit module 112k, for the telecommunications for changing the 3rd photoelectric switching circuit module 112j Number it is demodulated into the control signal and is sent respectively to first signal processing unit 102 and the first photoelectric coupled circuit module 112m；

The first photoelectric coupled circuit module 112m, for the control signal to be sent into the secondary signal processing unit 304。

Wherein, in the branch units of seabed, the first signal processing unit 102 and secondary signal processing unit 104 generally by Different power supply units are powered, therefore, the voltage of two may be different, if the 3rd demodulator circuit module 112k and the first signal Processing unit 102 and secondary signal processing unit 104 are joined directly together, then may because of voltage differences the reason for and cause two Signal processing unit all cannot normal work, accordingly, it would be desirable to using the first photoelectric coupled circuit module 112m to two signal transacting lists Unit is isolated.

Additionally, the carrying load ability in order to improve circuit, after the 3rd demodulation electricity 112k, the first photoelectric coupled circuit module Before 112m and the first signal processing unit 102, a radio frequency can also be set and follow amplification circuit module.

Wherein, first signal processing unit 102 and the secondary signal processing unit 104 have respective numbering, The mark of first signal processing unit 102 can be the address of the seabed branch units and the first signal transacting list Unit 102 numbering combination, the secondary signal processing unit 104 mark can be the seabed branch units address with The combination of the coding of the secondary signal processing unit 104.

Or,

Be seabed branch units with the seabed branch units, the extra large cable terminal device be extra large cable terminal device A as a example by, if extra large The numbering of the first signal processing unit 102 in bottom branch unit is 0x01, and the numbering of secondary signal processing unit 104 is 0x02.When extra large cable terminal device A transmission TURPs change control command, modulation includes the address of seabed branch units in business light With the control signal of the numbering 0x01 of the first signal processing unit 102, the first signal processing unit 102 detecting the control believe The address of the seabed branch units in number is correct, and numbering is itself numbering 0x01, then according to control signal to seabed branch list Unit carries out TURP and changes, such as, status of electrically connecting is switched into ac states by current ab states.And secondary signal processing unit 104 is examined The address for measuring seabed branch units in the control signal is correct, but numbering is not itself numbering 0x02, then do not perform TURP Change operation.

Or, if the first signal processing unit 102 and secondary signal processing unit 104 in the branch units of seabed each have There is the unique address of system, then when extra large cable terminal device A transmissions TURP changes control command, modulation includes first in business light The control signal of the address of signal processing unit 102, the ground that the first signal processing unit is included in the control signal is detected Location is Self address, then carrying out TURP to seabed branch units according to control signal changes.And secondary signal processing unit 104 is detected It is not Self address to go out the address included in the control signal, then do not perform electrical switching operation.

Fig. 2 is referred to, the equipment pie graph of the seabed branch units provided it illustrates yet another embodiment of the invention.The sea It is connected by optical fiber and cable between bottom branch unit and extra large cable terminal device.The seabed branch units can include：First Signal processing unit 102, secondary signal processing unit 104, first port 106, second port 108, the 3rd port 110 and point Not with the first port 106, corresponding three photoelectric conversion units 112 in 108 and the 3rd port of second port 110；

Fig. 5 is referred to, it illustrates the connection diagram of the photoelectric conversion unit described in yet another embodiment of the invention, its In, the photoelectric conversion unit includes：4th optical splitter 112n, the 4th photoelectric switching circuit module 112p, the 4th demodulator circuit Module 112q and the second photoelectric coupled circuit module 112r；

The input path of the 4th optical splitter 112n is the light path of the business light；The 4th photoelectric switching circuit mould The input end of block 112p is on the emitting light path of the 4th optical splitter 112n；The 4th demodulator circuit module 112q's is defeated Enter end to be connected with the output end of the 4th photoelectric switching circuit module 112p；Two of the 4th demodulator circuit module 112q Output end respectively with the input and the input of first signal processing unit 102 of the second photoelectric coupled circuit module 112r It is connected；The output end of the second photoelectric coupled circuit module 112q is connected with the input of the secondary signal processing unit 104；

The 4th optical splitter 112n, for isolating a part of business light；

The 4th photoelectric switching circuit module 112p, for the total optical power signal of the business light to be converted into telecommunications Number and be sent to the 4th demodulator circuit module 112q；

Wherein, the control signal is modulated on the business light by the extra large cable terminal device by adjusting top mode.

The 4th demodulator circuit module 112q, for the telecommunications for changing the 4th photoelectric switching circuit module 112p Number it is demodulated into the control signal and is sent respectively to first signal processing unit 102 and the second photoelectric coupled circuit module 112r；

The second photoelectric coupled circuit module 112r, for the control signal to be sent into the secondary signal processing unit 104。

Wherein, in the branch units of seabed, the first signal processing unit 102 and secondary signal processing unit 104 generally by Different power supply units are powered, therefore, the voltage of two may be different, if the 4th demodulator circuit module 112q and the first signal Processing unit 102 and secondary signal processing unit 104 are joined directly together, then may because of voltage differences the reason for and cause two Signal processing unit all cannot normal work, accordingly, it would be desirable to using the second photoelectric coupled circuit module 112r to two signal transacting lists Unit is isolated.

Additionally, the carrying load ability in order to improve circuit, after the 4th demodulator circuit module 112q, the second photoelectric coupled circuit Before module 112r and the first signal processing unit 102, a radio frequency can also be set and follow amplification circuit module.

Or,

Described each photoelectric conversion unit includes an input and two output ends；Described each photoelectric conversion unit 112 input is used to receive the business light being input into from corresponding port；Two of each photoelectric conversion unit 112 are defeated Go out end to be connected with first signal processing unit 102 and the secondary signal processing unit 104 respectively；

Fig. 6 is referred to, it illustrates the connection diagram of the photoelectric conversion unit described in yet another embodiment of the invention, its In, the photoelectric conversion unit includes：5th optical splitter 112s, the 6th optical splitter 112t, the 5th photoelectric switching circuit module 112u, the 5th demodulator circuit module 112v, the 6th photoelectric switching circuit module 112w and the 6th demodulator circuit module 112x；

The input path of the 5th optical splitter 112s is the light path of the business light；The 6th optical splitter 112t's enters Penetrate the emitting light path that light path is the 5th optical splitter 112s；The input of the 5th photoelectric switching circuit module 112u and institute The input for stating the 6th photoelectric switching circuit module 112w is respectively on two articles of emitting light paths of the 6th optical splitter 112t； The output end of the 5th photoelectric switching circuit module 112u is connected with the input of the 5th demodulator circuit module 112v, institute The output end for stating the 6th photoelectric switching circuit module 112w is connected with the input of the 6th demodulator circuit module 112x；It is described The output end of the 5th demodulator circuit module 112v is connected with the input of first signal processing unit 102, the 6th solution The output end of circuit module 112x is adjusted to be connected with the input of the secondary signal processing unit 104；

The 5th optical splitter 112s, for isolating a part of business light；

The 6th optical splitter 112t, for the business light that the 5th optical splitter 112s is isolated to be divided into two-way, point Do not send to the 5th photoelectric switching circuit module 112u and the 6th photoelectric switching circuit module 112w；

The 5th photoelectric switching circuit module 112u, for the total of the business light that separates the 6th optical splitter 112t Optical power signals are converted to electric signal and are sent to the 5th demodulator circuit module 112v；

The 5th demodulator circuit module 112v, for the telecommunications for changing the 5th photoelectric switching circuit module 112u Number it is demodulated into the control signal and is sent to first signal processing unit 102；

The 6th photoelectric switching circuit module 112w, for the total of the business light that separates the 6th optical splitter 112t Optical power signals are converted to electric signal and are sent to the 6th demodulator circuit module 112x；

Wherein, the control signal is modulated on the business light by the extra large cable terminal device by adjusting top mode；

The 6th demodulator circuit module 112x, for the telecommunications for changing the 6th photoelectric switching circuit module 112w Number it is demodulated into the control signal and is sent to the secondary signal processing unit 104.

Or,

Additionally, in order to improve backup effect, above-mentioned 5th photoelectric switching circuit module 112u, the 5th demodulator circuit module 112v and the first signal processing unit 102 can be powered by same power supply unit, the 6th photoelectric switching circuit module 112w, Six demodulator circuit module 112x and secondary signal processing unit 104 can be powered by another power supply unit, so, even if having one The failure of individual power supply unit, the corresponding photoelectric switching circuit module of another power supply unit and demodulation circuit module can also be obtained normally Control signal.Further, power supply unit can also further be segmented, such as, and the 5th photoelectric switching circuit module 112u and the 5th demodulator circuit module 112v are powered by the first power supply unit, and the first signal processing unit 102 is single by the second power supply Unit's power supply, the 6th photoelectric switching circuit module 112w and the 6th demodulator circuit module 112x are powered by the 3rd power supply unit, and second Signal processing unit 104 is powered by the 4th power supply unit, so, even if the first power supply unit and the 3rd power supply unit fail, As long as the first signal processing unit 102 or secondary signal processing unit 104 can be with normal works, seabed branch units can be with Control signal is obtained in the input optical fibre accessed from other ports and is processed by the first signal processing unit 102 or secondary signal Unit 104 seabed branch units is controlled.

Fig. 7 is referred to, the equipment pie graph of the extra large cable terminal device provided it illustrates one embodiment of the invention is described Extra large cable terminal device includes：

Modulating unit 202, for the modulation control signal in business light, includes at echo signal in the control signal Manage the mark of unit；

Transmitting element 204, the business light for will be modulated with the control signal is connected by with seabed branch units Optical fiber be sent to a port in the seabed branch units；The control signal is used for by the seabed branch units Photoelectric conversion unit corresponding with the port is obtained from the business light, and by the first letter in the seabed branch units Number processing unit and secondary signal processing unit detect the echo signal processing unit identify whether it is identical with self identification, If detecting, the mark of the echo signal processing unit is identical with self identification, according to the control signal to the seabed The status of electrically connecting of branch units is switched over.

In sum, extra large cable terminal device provided in an embodiment of the present invention, by the way that echo signal processing unit will be included The control signal of mark be modulated in business light, and be sent to the first signal processing unit, secondary signal processing unit and The seabed branch units of photoelectric conversion unit, is obtained employment by photoelectric conversion unit in the light path in business light in the branch units of seabed Control signal is obtained in business light and the first signal processing unit and secondary signal processing unit is sent respectively to, by the first signal When the mark of reason unit or secondary signal processing unit detection echo signal processing unit is identical with self identification, according to control Signal is switched over to the status of electrically connecting of seabed branch units, is solved many set signals in the prior art and is received and processing unit It is independent mutually, it is necessary to connect different input optical fibres respectively, when a port of seabed branch units only accesses an input light When fine, signal receives the problem not high with the reliability of process circuit, reaches the reception of improvement signal and is imitated with the backup of process circuit Really, the purpose of reliability is improved.

In order to be described further to the extra large cable terminal device shown in above-mentioned Fig. 7, Fig. 8 is referred to, it illustrates the present invention The equipment pie graph of the extra large cable terminal device that another embodiment is provided.The extra large cable terminal device can send to seabed branch units The business light of control signal is modulated with, to control the seabed branch units to be electrically connected the switching of state.The extra large cable terminal sets It is standby to include：

Modulating unit 302, for the modulation control signal in business light, includes at echo signal in the control signal Manage the mark of unit；

Transmitting element 304, the business light for will be modulated with the control signal is connected by with seabed branch units Optical fiber be sent to a port in the seabed branch units；The control signal is used for by the seabed branch units Photoelectric conversion unit corresponding with the port is obtained from the business light, and by the first letter in the seabed branch units Number processing unit and secondary signal processing unit detect the echo signal processing unit identify whether it is identical with self identification, If detecting, the mark of the echo signal processing unit is identical with self identification, according to the control signal to the seabed The status of electrically connecting of branch units is switched over.

Wherein, the concrete structure of seabed branch units refers to Fig. 3 to 6 and Fig. 3 to 6 corresponding embodiment explanations, this Inventive embodiments are repeated no more.

The modulating unit 302 includes：

First modulation subunit 302a, the light of the specified wavelength for being modulated at the control signal in the business light In signal.

The modulating unit 302 also includes：

Second modulation subunit 302b, for the control signal to be modulated at into the business light by adjusting top mode.

The extra large cable terminal device also includes：

Detection unit 306, for detect the echo signal processing unit the corresponding signal processing unit of mark whether Failure；

Wherein, the method that whether signal processing unit in extra large cable terminal device detection seabed branch units fails has many Kind, such as, be extra large cable terminal device with extra large cable terminal device, seabed branch units for as a example by the branch units of seabed, extra large cable terminal Equipment can send be modulated with the business light of control signal after according to seabed branch units electrically connect working condition change with And during the change of the supply voltage of extra large cable terminal device connection detects the seabed branch units, with the target that includes in control signal Whether the corresponding signal processing unit of mark of signal processing unit fails.Such as, the business of control signal is modulated with transmission After light, seabed branch units electrical connection working condition does not change, and/or, the supply voltage of extra large cable terminal device connection is not Produce corresponding change, then it is corresponding with the mark of the echo signal processing unit included in control signal in the seabed branch units Signal processing unit may fail.

Or, extra large cable terminal device can receive seabed branch units after the business light for being modulated with control signal is sent Feedback information, according to feedback information detection signal corresponding with the mark of the echo signal processing unit included in control signal Whether processing unit fails.Such as, extra large cable terminal device send be modulated with control signal business light after, seabed branch units The feedback information of return shows that the electrical connection working condition of the seabed branch units does not change, then in the seabed branch units Signal processing unit corresponding with the mark of the echo signal processing unit included in control signal may fail.

The modulating unit 302, if being lost for the corresponding signal processing unit of mark of the echo signal processing unit Effect, then modulate new control signal in the business light, and new object processing unit is included in the new control signal Mark；

The transmitting element 304, the business light for will be modulated with the new control signal is sent by the optical fiber To the seabed branch units.

Because two signal processing units in the branch units of seabed have respective mark.Included in control signal The corresponding signal processing unit of mark of echo signal processing unit when failing, extra large cable terminal device can directly change control The mark of the echo signal processing unit in signal, and after amended control signal is modulated in business light, according to former road Footpath resends, you can seabed branch units is controlled with by another signal processing unit in the branch units of seabed, no Complicated software control protocol is needed, control command modification is simple, and reliability is high.

In sum, extra large cable terminal device provided in an embodiment of the present invention, by the way that echo signal processing unit will be included The control signal of mark be modulated in business light, and be sent to the first signal processing unit, secondary signal processing unit and The seabed branch units of photoelectric conversion unit, is obtained employment by photoelectric conversion unit in the light path in business light in the branch units of seabed Control signal is obtained in business light and the first signal processing unit and secondary signal processing unit is sent respectively to, by the first signal When the mark of reason unit or secondary signal processing unit detection echo signal processing unit is identical with self identification, according to control Signal is switched over to the status of electrically connecting of seabed branch units, is solved many set signals in the prior art and is received and processing unit It is independent mutually, it is necessary to connect different input optical fibres respectively, when a port of seabed branch units only accesses an input light When fine, signal receives the problem not high with the reliability of process circuit, reaches the reception of improvement signal and is imitated with the backup of process circuit Really, the purpose of reliability is improved；Additionally, extra large cable terminal device provided in an embodiment of the present invention, when detect with control signal Comprising the corresponding signal processing unit of mark of echo signal processing unit fail when, modulated in the business light and included The new control signal of the mark of new object processing unit, and the business light of new control signal will be modulated with by same light Fibre is sent to seabed branch units, reaches simplify control order amendment step, improves the purpose of reliability.

It should be noted that：The signal processing method that above-described embodiment is provided when signal transacting is carried out, only with above-mentioned each The division of functional module is carried out for example, in practical application, as needed can distribute by different work(above-mentioned functions Can module complete, will the internal structure of equipment be divided into different functional modules, to complete whole described above or portion Divide function.In addition, the signal processing unit that above-described embodiment is provided belongs to same design with the embodiment of the method for signal transacting, its The process of implementing refers to embodiment of the method, repeats no more here.

The embodiments of the present invention are for illustration only, and the quality of embodiment is not represented.

One of ordinary skill in the art will appreciate that realizing that all or part of step of above-described embodiment can be by hardware To complete, it is also possible to instruct the hardware of correlation to complete by program, described program can be stored in a kind of computer-readable In storage medium, storage medium mentioned above can be read-only storage, disk or CD etc..

The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all it is of the invention spirit and Within principle, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.

Claims

1. a kind of seabed branch units, it is characterised in that the seabed branch units includes：First signal processing unit, second Signal processing unit, first port, second port, the 3rd port and respectively with the first port, second port and the 3rd Corresponding three photoelectric conversion units in port；

Described each photoelectric conversion unit includes an input and two output ends；Each photoelectric conversion unit it is defeated Enter end for receiving the business light being input into from corresponding port；Two output ends of each photoelectric conversion unit respectively with First signal processing unit is connected with the secondary signal processing unit；

Described each photoelectric conversion unit, for obtaining control signal from the business light for receiving, and will get The control signal is sent respectively to first signal processing unit and the secondary signal processing unit；The control signal In include the mark of echo signal processing unit；

First signal processing unit, mark and first signal transacting for detecting the echo signal processing unit Identifying whether for unit is identical, if the mark phase of the mark of the echo signal processing unit and first signal processing unit Together, then the status of electrically connecting of the seabed branch units is switched over according to the control signal；

The secondary signal processing unit, the mark for detecting the echo signal processing unit is processed with the secondary signal Identifying whether for unit is identical, if the mark phase of the mark of the echo signal processing unit and the secondary signal processing unit Together, then the status of electrically connecting of the seabed branch units is switched over according to the control signal.

2. seabed branch units according to claim 1, it is characterised in that the photoelectric conversion unit includes：First point Light device, the first optical filter, the second optical splitter, the first photoelectric switching circuit module, the first demodulator circuit module, the second photoelectricity turn Change circuit module and the second demodulator circuit module；

The input path of first optical splitter is the light path of the business light；The input path of first optical filter is institute State the emitting light path of the first optical splitter；The input path of second optical splitter is the emitting light path of first optical filter； The input of the input of the first photoelectric switching circuit module and the second photoelectric switching circuit module is respectively at institute State on two emitting light paths of the second optical splitter；The output end of the first photoelectric switching circuit module and the described first demodulation electricity The input of road module is connected, and the output end of the second photoelectric switching circuit module is defeated with the second demodulator circuit module Enter end to be connected；The output end of the first demodulator circuit module is connected with the input of first signal processing unit, described The output end of the second demodulator circuit module is connected with the input of the secondary signal processing unit；

First optical splitter, for isolating a part of business light；

First optical filter, the light letter for filtering out specified wavelength in the business light isolated from first optical splitter Number；

Second optical splitter, for the optical signal of the specified wavelength to be divided into two-way, is respectively sent to first photoelectricity Conversion circuit module and the second photoelectric switching circuit module；

The first photoelectric switching circuit module, it is concurrent for the optical signal that second optical splitter sends to be converted into electric signal Give the first demodulator circuit module；

The first demodulator circuit module, it is described for the electric signal that the first photoelectric switching circuit module is changed to be demodulated into Control signal is simultaneously sent to first signal processing unit；

The second photoelectric switching circuit module, it is concurrent for the optical signal that second optical splitter sends to be converted into electric signal Give the second demodulator circuit module；

The second demodulator circuit module, it is described for the electric signal that the second photoelectric switching circuit module is changed to be demodulated into Control signal is simultaneously sent to the secondary signal processing unit.

3. seabed branch units according to claim 1, it is characterised in that the photoelectric conversion unit includes：3rd light splitting Device, the second optical filter, the 3rd photoelectric switching circuit module, the 3rd demodulator circuit module and the first photoelectric coupled circuit module；

The input path of the 3rd optical splitter is the light path of the business light；The input path of second optical filter is institute State the emitting light path of the 3rd optical splitter；The input end of the 3rd photoelectric switching circuit module is in second optical filter On emitting light path；The input of the 3rd demodulator circuit module and the output end phase of the 3rd photoelectric switching circuit module Even, two output ends of the 3rd demodulator circuit module respectively with the input of the first photoelectric coupled circuit module and described the The input of one signal processing unit is connected；The output end of the first photoelectric coupled circuit module and the secondary signal processing unit Input be connected；

3rd optical splitter, for isolating a part of business light；

Second optical filter, the light letter for filtering out specified wavelength in the business light isolated from the 3rd optical splitter Number；

The 3rd photoelectric switching circuit module, for the optical signal of the specified wavelength to be converted into electric signal and institute is sent to State the 3rd demodulator circuit module；

The 3rd demodulator circuit module, it is described for the electric signal that the 3rd photoelectric switching circuit module is changed to be modulated to Control signal is simultaneously sent respectively to first signal processing unit and the first photoelectric coupled circuit module；

4. seabed branch units according to claim 1, it is characterised in that the photoelectric conversion unit includes：4th light splitting Device, the 4th photoelectric switching circuit module, the 4th demodulator circuit module and the second photoelectric coupled circuit module；

The input path of the 4th optical splitter is the light path of the business light；The input of the 4th photoelectric switching circuit module On emitting light path of the end in the 4th optical splitter；The input of the 4th demodulator circuit module turns with the 4th photoelectricity The output end for changing circuit module is connected；Two output ends of the 4th demodulator circuit module respectively with second photoelectric coupled circuit The input of module is connected with the input of first signal processing unit；The output end of the second photoelectric coupled circuit module with The input of the secondary signal processing unit is connected；

4th optical splitter, for isolating a part of business light；

The 4th photoelectric switching circuit module, for being converted to electric signal and sending the total optical power signal of the business light To the 4th demodulator circuit module；

The 4th demodulator circuit module, it is described for the electric signal that the 4th photoelectric switching circuit module is changed to be demodulated into Control signal is simultaneously sent respectively to first signal processing unit and the second photoelectric coupled circuit module；

5. seabed branch units according to claim 1, it is characterised in that the photoelectric conversion unit includes：5th point Light device, the 6th optical splitter, the 5th photoelectric switching circuit module, the 5th demodulator circuit module, the 6th photoelectric switching circuit module with And the 6th demodulator circuit module；

The input path of the 5th optical splitter is the light path of the business light；The input path of the 6th optical splitter is described The emitting light path of the 5th optical splitter；The input and the 6th photoelectric switching circuit mould of the 5th photoelectric switching circuit module The input of block is respectively on two articles of emitting light paths of the 6th optical splitter；The 5th photoelectric switching circuit module it is defeated Go out end be connected with the input of the 5th demodulator circuit module, the output end of the 6th photoelectric switching circuit module with it is described The input of the 6th demodulator circuit module is connected；The output end of the 5th demodulator circuit module and the first signal transacting list The input of unit is connected, the output end of the 6th demodulator circuit module and the input phase of the secondary signal processing unit Even；

5th optical splitter, for isolating a part of business light；

6th optical splitter, for the business light that the 5th optical splitter is isolated to be divided into two-way, is respectively sent to described 5th photoelectric switching circuit module and the 6th photoelectric switching circuit module；

The 5th photoelectric switching circuit module, the total optical power signal of the business light for the 6th optical splitter to be separated turns It is changed to electric signal and is sent to the 5th demodulator circuit module；

The 5th demodulator circuit module, it is described for the electric signal that the 5th photoelectric switching circuit module is changed to be demodulated into Control signal is simultaneously sent to first signal processing unit；

The 6th photoelectric switching circuit module, the total optical power signal of the business light for the 6th optical splitter to be separated turns It is changed to electric signal and is sent to the 6th demodulator circuit module；

The 6th demodulator circuit module, it is described for the electric signal that the 6th photoelectric switching circuit module is changed to be demodulated into Control signal is simultaneously sent to the secondary signal processing unit.

6. according to any described seabed branch units of claim 1 to 5, it is characterised in that first signal processing unit With the secondary signal processing unit there is respective numbering, first signal processing unit is designated the seabed branch The combination of the address of unit and the numbering of first signal processing unit, being designated for the secondary signal processing unit is described The combination of the address of seabed branch units and the numbering of the secondary signal processing unit.

7. according to any described seabed branch units of claim 1 to 5, it is characterised in that first signal processing unit With the secondary signal processing unit there is respective address, first signal processing unit is designated first signal The address of processing unit, the address for being designated the secondary signal processing unit of the secondary signal processing unit.

8. a kind of extra large cable terminal device, it is characterised in that the extra large cable terminal device includes：

Modulating unit, for the modulation control signal in business light, includes echo signal processing unit in the control signal Mark；

Transmitting element, sends out for will be modulated with optical fiber of the business light of the control signal by being connected with seabed branch units Give a port in the seabed branch units；The control signal be used for by the seabed branch units with the end The corresponding photoelectric conversion unit of mouth is obtained from the business light, and by the first signal transacting list in the seabed branch units Identifying whether for the first and secondary signal processing unit detection echo signal processing unit is identical with self identification, if detecting The mark of the echo signal processing unit is identical with self identification, then according to the control signal to the seabed branch units Status of electrically connecting switch over.

9. extra large cable terminal device according to claim 8, it is characterised in that the modulating unit includes：

First modulation subunit, in the optical signal of the specified wavelength that the control signal is modulated in the business light.

10. extra large cable terminal device according to claim 8, it is characterised in that the modulating unit includes：

11. according to any described extra large cable terminal device of claim 8 to 10, it is characterised in that the extra large cable terminal device is also Including：

Whether detection unit, the corresponding signal processing unit of mark for detecting the echo signal processing unit fails；

The modulating unit, if being failed for the corresponding signal processing unit of mark of the echo signal processing unit, New control signal is modulated in the business light, the mark of new object processing unit is included in the new control signal.