The Ethernet passive optical-fiber network terminal equipment that has the voice channel handoff functionality
Technical field
The utility model belongs to the passive optical-fiber network apparatus field, relates to a kind of switching device that is applicable to speech interface among the multitenant unit MDU, the speech interface implementation that particularly a kind of flexibility is strong, make things convenient for telecom operators to meet consumers' demand.
Background technology
Based on Ethernet passive optical-fiber network EPON is a kind of single fiber bi-directional Optical Access Network that adopts some multipoint configuration, has that cost is low, the life-span long, distance and a bandwidth advantages of higher.The EPON system is made up of the optical line terminal OLT of office's side, the optical network unit ONU and the Optical Distribution Network ODN of user side, is the single fiber bi-directional system.
Along with the sustainable development of EPON technology and the extensive use of ONU, light to building FTTB as a kind of based on the broadband access method of optimizing the high speed fibre local area network technology, adopt Fiber-To-The-Building, netting twine to realize user's broadband access to the mode at family, realize that by the monomode fiber express network gigabit arrives building to community, local area network (LAN) 100,000,000,10,000,000 to the user, makes it become a kind of reasonable, practical and cost-effective broad band access method in the EPON system.
In the prior art, multitenant unit type optical network unit is because its many Ethernet interfaces and multipoint interface become main form among the FTTB type ONU, Ethernet/IP operation can be supported, also the VoIP speech business can be supported, be built-in with integrated access equipment IAD in the equipment, make its sub-district that is mainly used in a plurality of residential customers or mansion.When telecom operators' erection unit, generally adopt independently mounting means, the data service of an equipment network enabled, another equipment support voice business, so not only waste resource, and according to user's different demands, also very not convenient when attended operation, need more alias, show that especially the user is when inserting telephone set in the needed interface equipment.Owing to support the development trend of VOIP business and speech business IPization, integrated IAD function becomes a kind of trend of MDU in MDU type ONU.Some user sub-district or mansion need voice-and-data to insert simultaneously, and also some need separately insert, and this transmission to speech business proposes higher requirement.Therefore, EPONMDU equipment need provide a kind of method that satisfies two kinds of access demands simultaneously, satisfies requirements of different users.
Summary of the invention
The purpose of this utility model is in order to solve because the not convenient technical problem that user's demand difference causes telecom operators to cause when speech interface is installed, designed a kind of Ethernet passive optical-fiber network terminal equipment that has the voice channel handoff functionality, by the speech interface switching device, no matter the user is connected speech interface or network interface with telephone set, can carry out normal voice call and network data service, when saving preventive maintenance time, also reduce production cost to telecom operators.
The utility model for realizing the technical scheme that goal of the invention adopts is, comprise the optical signal transceiver modular circuit that is linked in sequence on optical fiber cable in the structure, the data conversion module circuit, the network terminating interface circuit is connected with the data conversion module circuit by data line, the speech interface circuit connects the voice access module circuit to be realized realizing being connected with fiber network terminal interface circuit by CPU, set up the second road voice transmission line at fiber network terminal interface circuit input end, be connected the voice signal end of voice access module circuit by the relay commutation circuit with the first road voice transmission line, phone in the voice access module circuit structure inserts the voice voltage signal that signal recognition circuit collects from collection network terminal interface circuit or speech interface circuit, output converts the controlled end that control signal is delivered to the relay commutation circuit to after CPU handles, and realizes the break-make conversion of above twice voice transmission line and access module circuit.
Circuit theory of the present utility model is, no matter which interface the user inserts with telephone set, after device power, equipment can be by relay adhesive acquiescence connected network terminal interface circuit, insert identification circuit by phone this moment and judge whether have phone to insert in the network terminating interface circuit, if have phone to insert, then disconnect the speech interface circuit; If no phone inserts, then disconnect the network terminating interface circuit, closed speech interface circuit, what the phone connection was described this moment is speech interface.
The beneficial effects of the utility model are, both provided a kind of data service and speech business swinging cross to insert, also provide data service and speech business separated time to insert, equipment manufacturers use and just can satisfy the different user application scenarios demand of telecom operators with a kind of equipment like this, reduce the product form of equipment manufacturers, the trouble of simultaneously also having avoided telecom operators need use distinct device to arrange net to different application scene demand, for the layout of EPON network facilitates, reduce telecom operators' cost input, be convenient to the popularization and the development of EPON network.
Below in conjunction with accompanying drawing the utility model is elaborated.
Description of drawings
Fig. 1 is a schematic block circuit diagram of the present utility model.
Fig. 2 is the specific embodiment circuit theory diagrams.
Fig. 3 is the netting twine connection diagram of speech business of the present utility model and data service swinging cross transmission.
In the accompanying drawing, the 1st, the optical transceiver module circuit in the passive light spider lines system, the 2nd, the data conversion module circuit, the 3rd, network terminating interface, the 4th, speech interface, the 5th, relay commutation circuit, the 6th, voice access module circuit, 6-1 is that phone inserts identification circuit, the 7th, optical fiber cable, 8 representative data transmission lines, first voice transmission line that 9 representatives are connected with speech interface, second voice transmission line that 10 representatives are connected with network terminating interface, K1, K2 are relays, and Q1, Q2 are triodes, and R1, R2 are resistance, D1, D2 are diodes, and U1 is an identification chip.
Embodiment
Referring to Fig. 1, the Ethernet passive optical-fiber network terminal equipment that has the voice channel handoff functionality, comprise the optical signal transceiver modular circuit 1 that is linked in sequence on optical fiber cable 7 in the structure, data conversion module circuit 2, network terminating interface 3 circuit are connected with data conversion module circuit 2 by data line 8, speech interface 4 circuit connect voice access module circuit 6 to be realized realizing being connected with fiber network terminal interface 3 circuit by CPU, set up the second road voice transmission line 10 at fiber network terminal interface 3 circuit input ends, be connected the voice signal end of voice access module circuit 6 by relay commutation circuit 5 with the first road voice transmission line 9, phone in voice access module circuit 6 structures inserts the voice voltage signal that signal recognition circuit 6-1 collects from collection network terminal interface 3 circuit or speech interface 4 circuit, output converts the controlled end that control signal is delivered to relay commutation circuit 5 to after CPU handles, and realizes the break-make conversion of above twice voice transmission line and access module circuit 6.
Referring to Fig. 2, be provided with two controlled gating circuit switch of forming by relay and supporting triode, diode and resistive element in above-mentioned relay commutation circuit 5 structures, the switch of first relay K 1 connects between network terminating interface 3 circuit and the voice access module circuit 6, the switch of second relay K 2 connects between speech interface 4 circuit and the voice access module circuit 6, and the first triode Q1 and the base stage of the second triode Q2 are connected the control output end of CPU respectively.
Above-mentioned phone inserts identification circuit 6-1 and comprises identification chip U1 and supporting peripheral circuit, identification chip U1 is connected with CPU by serial communication interface and pulse modulation interface, and the voice signal end of identification chip U1 connects relay commutation circuit 5 by voice transmission line.
Above-mentioned identification chip U1 is the LE882286 that Legerity company produces.
Above-mentioned CPU is the M82354 that MindSpeed company produces.
When concrete the use, described optical transceiver module circuit 1 is the EPON module, and data conversion module circuit 2 is Switch modules, and 6 of voice access module circuit are the IAD integrated access equipment.No matter which interface the user inserts with telephone set, after device power, equipment can be by relay adhesive acquiescence connected network terminal interface 3 circuit, insert identification circuit 6-1 by phone this moment and judge whether have phone to insert in network terminating interface 3 circuit, if have phone to insert, then disconnect the speech interface circuit; If no phone inserts, then disconnect network terminating interface 3 circuit, closed speech interface 4 circuit, what the phone connection was described this moment is speech interface 4.
Referring to Fig. 3, the principle that above-mentioned phone inserts the access of identification circuit 6-1 judgement phone is: the equivalent resistance test philosophy that utilizes SLIC identification chip U1, it mainly is the equivalent phone number of test, CPU removes to operate and read the register of SLIC identification chip U1 by serial line interface, judge between TIP and the RING phone on the circuit, equivalence is the change in voltage of an electric capacity of a resistance series connection, and software is judged circuit by the impedance of calculating then.When equivalent phone number was 0 between test TIP and the RING, the voltage no change then illustrated and does not insert phone on the circuit; When the equivalent phone number of test was 1, voltage can change, and then illustrates to insert phone in the circuit.