CN101841747B - Plugboard type FTTB (Fiber To The Building) type ONU (Optical Network Unit) and method for realizing voice service - Google Patents

Abstract

The invention discloses a plugboard type FTTB (Fiber To The Building) type ONU (Optical Network Unit) and a method for realizing a voice service. The plugboard type FTTB type ONU comprises a backboard, a main control disk and a plurality of service disks, wherein at least one of the service disks is a voice service disk; and the main control disk and a plurality of service disks are respectively inserted into the backboard and are mutually connected through an IP (Internet Protocol) bus on the backboard. In the invention, a DSP (Digital Signal Processing) module is placed on the voice service disk, so that the main control disk is connected with the voice service disk through the IP bus; the invention changes the traditional mode of TDM (Time Division Multiplex) bus communication and simplifies a backboard circuit and a system structure; and according to the proportion for provisioning the voice service, DSP resources can be flexibly allocated, the processing capacity of the system on the voice service can be improved, and the problem of the bottleneck of the DSP resources can be solved.

Description

The method of plugboard type FTTB (Fiber To The Building) type ONU and realization speech business

Technical field

The present invention relates to EPON/GPON equipment, be specifically related to the method for plugboard type FTTB (Fiber To The Building) type ONU and realization speech business.

Background technology

Employed explanation of nouns is as follows among the application:

SLIC, Subscriber Line Interface Controller, subscriber line interface controller;

DSP, Digital Signal Processing;

Codec, coder.

Along with the fast development of technology, the user is more and more higher to the requirement of the network bandwidth and stability, and therefore, the trend of light entering and copper back, unification of three nets is inevitable.Fig. 1 is typical EPON/GPON schematic diagram, is comprised of OLT (optical line terminal), ODN (passive light distribution network) and ONU (optical network unit).OLT is placed on the local central machine room, sends Ethernet data with broadcast mode to ONU; ODN is the optical transmission physical channel between OLT and the ONU, and the corollary equipment by optical fiber cable, optical connector, optical branching device and these devices of installation connection forms usually; ONU is divided into two types of FTTH (Fiber to the home) and FTTB (Fiber-To-The-Building) usually, and a plurality of users are connected on the ONU.

For operator and service provider, FTTH and FTTB type ONU can bring many-sided benefit, comprise reducing installation administration and operation cost; saved the laying expense of copper cash; improve rate of return on investment, increase new profit chance, protect for a long time competitive advantage.Adopting EPON, GPON to set up Access Network, no matter for incumbent operator or emerging operator, all will be a splendid selection scheme.At present, FTTB type ONU is most widely used, and is used for FTTC or Fiber To The Building, again by twisted-pair feeder to each user, compare MSAN (multi-service access node) equipment, the FTTB mode has been saved user's copper cable greatly.

The speech business of FTTB realizes that it is the centralized processing mode that kinds of schemes, traditional implementation method are arranged, and namely the DSP digital signal processing module is placed on main control unit, and the Business Stream of all voice dishes all focuses at main control unit.Because traditional implementation method DSP is arranged in the main control unit, the POTS dish links to each other with backboard by TDM (time division multiplexing) bus, and this design has increased the complexity of backboard, and, no matter whether the user opens speech business, all need to place the DSP processing module, increased user cost.

Summary of the invention

Technical problem to be solved by this invention is to solve the problem that the ONU backboard is complicated, cost is high.

In order to solve the problems of the technologies described above, the technical solution adopted in the present invention provides a kind of plugboard type FTTB (Fiber To The Building) type ONU, comprise backboard, main control unit and some professional dishes, at least one be the speech business dish for described some professional dishes, and described main control unit and described some professional coiling are inserted into respectively on the backboard and by the IP bus interconnection on the backboard.

Above-mentioned plugboard type FTTB (Fiber To The Building) type ONU, speech business dish are provided with SLIC module, DSP module and Codec module, and described SLIC module is provided with the analog phone line interface, and input, the output that is used for voice flow is processed and plucked, on-hook detects; Described Codec module links to each other with the DSP module by pcm bus, is used for realizing A/D, the D/A conversion of the voice flow between SLIC module and the DSP module; Described DSP module be used for to voice flow encode packing, unpack processing; Speech business stream is finished at main control unit with data traffic flow and is compiled or separate.

The present invention also provides a kind of plugboard type FTTB (Fiber To The Building) type ONU to realize the method for speech business, it is characterized in that handling process is as follows:

The off-hook event that A10, soft-switch platform detect and report according to the speech business dish issues number figure, and the DSP module in the notice speech business dish plays dialing tone for corresponding port;

A20, main control unit check that whether dialer event is complementary with several figure that soft switch issues, if certain the dialer event sequence among this dialer event coupling number figure maybe can not be mated the dialer event sequence among the number figure, then will collect the digits and finish information reporting to soft-switch platform;

A30, soft-switch platform receive collect the digits finish message after, to called transmission ALERTING message, called terminal ringing and initiating a message is notified called ONU to create the DSP passage, revises the media channel far-end IP and is changed transceiver mode into SendRecv, the main control unit of called ONU to above-mentioned message parse after, with the DSP module creation DSP passage in the privately owned communication protocol of the POTS notice POTS dish, revise the media channel far-end IP, revise transceiver mode and ring operation; Soft-switch platform sends Add message to caller simultaneously, requires caller to set up corresponding temporary destination node; After the main control unit of caller ONU is finished message parse, set up the DSP passage with the DSP in the privately owned communication protocol notice of the POTS POTS dish, pattern is set to ReceiveOnly;

A40, in called terminal ringing, soft-switch platform sends playing RBT message to ONU, and gives corresponding port playing RBT by the DSP module in the main control unit notice speech business dish; Soft-switch platform notice ONU is revised as called IP address with its media channel far-end IP simultaneously, and the attribute of the media channel far-end IP address of opening before resetting;

After A50, called off-hook event reported soft-switch platform, soft-switch platform was SendReceive with caller media channel attribute modification, and the attribute of the media channel that the DSP in the speech business dish will open before is re-set as transmitting-receiving, and calling and called begin normal talking;

In the above-mentioned ONU speech processes flow process, main control unit and speech business dish communicate by the IP core bus.

Above-mentioned plugboard type FTTB (Fiber To The Building) type ONU realizes the method for speech business, adopt different privately owned communication protocol to communicate according to different events between main control unit and the speech business dish, different events will be encapsulated in the different privately owned communication protocol with the UDP message format, and described different event comprises that customer incident reports, signal tone is put/stopped, five kinds of the state reportings of the control command of the operation of DSP channel attributes, port or single-deck and port or single-deck.

Above-mentioned plugboard type FTTB (Fiber To The Building) type ONU realizes the method for speech business, includes slot number, port numbers and the event id parameter at caller and called users place in the customer incident reporting message.

Signal tone is put/is stopped slot number, port numbers, signal tone ID, the playing duration that includes the caller and called users place in the message and stops duration parameters.

DSP channel attributes operation information includes slot number, port numbers and the DSP channel attributes parameter at caller and called users place.

The slot number, port numbers and the control command parameter that comprise the caller and called users place in the control command operation information of port or single-deck.

Include in the state reporting message of port or single-deck the caller and called users place slot number, port numbers, order and report content parameters.

Above-mentioned plugboard type FTTB (Fiber To The Building) type ONU realizes in the method for speech business that the step of main control unit separated media stream is as follows:

After the CPU of B10, main control unit receives packet, judge at first whether this packet is with by UDP message and this UDP message whether vlan information is voice vlan;

To be with vlan information be not voice vlan if this packet of B20 is not UDP message or this UDP message, then processes by other operation flows; Otherwise turn step B30;

B30, main control unit parse source MAC and the source IP address that carries in this message, if source MAC and source IP address all are MAC Address and the IP address of DSP, then turn step B40, otherwise turn step B50;

If B40 source udp port is not the RTP/RTCP port that distributes, direct transparent transmission then, otherwise turn step B60;

If B50 purpose IP is not local media stream IP, direct transparent transmission then, otherwise turn step B80;

B60, parse the real MAC address of purpose IP, if resolve unsuccessfully, then abandon this message, otherwise turn step B70;

B70, message source IP is replaced with local media stream IP, turn step B110;

B80, judging that whether the purpose udp port is the RTP/RTCP port that distributes, is then to turn step B90; Otherwise judge whether local media stream IP and signaling IP are same IP, if it is abandon this message, otherwise direct transparent transmission;

B90, determine the IP of purpose DSP according to the RTP/RTCP port range;

B100, source IP replaced with the IP of purpose DSP;

B110, source MAC is replaced with the MAC Address of main control unit, target MAC (Media Access Control) address is replaced with true target MAC (Media Access Control) address, and transmit.

The present invention is put in DSP module (digital signal processing module) on the speech business dish, so that realized that also the IP bus is connected between main control unit and speech business dish, changed the mode of the TDM bus communication of traditional employing, simplified the backboard circuit, simplified system configuration, improve system to the speech business disposal ability, solved the problem of DSP resource bottleneck.

Description of drawings

Fig. 1 is typical EPON/GPON schematic diagram;

Fig. 2 is that pure IP connects block diagram between main control unit and the professional dish;

Fig. 3 is the main control unit theory diagram;

Fig. 4 is speech business dish (POTS) theory diagram;

Fig. 5 is sub-frame panel figure;

Fig. 6 is main control unit separated media stream flow chart;

Fig. 7 is main control unit speech business signaling process chart;

Embodiment

Below in conjunction with accompanying drawing the present invention is made detailed explanation.

The invention provides a kind of plugboard type FTTB (Fiber To The Building) type ONU, comprise backboard, main control unit and some professional dishes, in some professional dishes at least one be the speech business dish, and described main control unit and described some professional coiling are inserted into respectively on the backboard and by the IP bus interconnection on the backboard.The realization of speech business is mainly finished by main control unit and speech business dish, and main control unit is mainly finished converging and processing of data service and speech business, finishes the forwarding of uplink and downlink Business Stream, voice signaling is processed, the Media Stream agency as the system management center, is the control centre of whole system.The speech business dish is finished the functions such as the collection, digital-to-analogue/analog-to-digital conversion, Digital Signal Processing of analog line signal.

Fig. 5 is a kind of specific embodiment of the present invention, and in this embodiment, board plug type ONU is comprised of sub-frame, fan disk, power supply disks, main control unit and some professional dishes, sub-frame is 19 inches structures of standard, high 2U, dark 210mm, on the sub-frame backboard is installed, adopts horizontal board plug structure, front outlet design.

Fan disk, power supply disks, main control unit and some professional dishes are inserted into respectively on the backboard, fan disk is positioned at sub-frame left part, power supply disks and main control unit are setting up and down, like this so that sub-frame radiating effect is better, be provided with altogether four professional grain positions on the main control unit, can the mixed insertion broadband, arrowband and the professional dish of wide and narrow strip unification, at least one be the speech business dish in the professional dish, main control unit and above-mentioned some professional coiling respectively by the IP bus interconnection on the backboard.Power supply disks provide simultaneously 220V exchange interface and-48V DC power supply interface, stronger to the power supply environmental suitability.

Main control unit is comprised of core Switching Module, master cpu and three parts of EPON/GPON first line of a couplet interface module, and it forms structure as shown in Figure 3.

The core Switching Module is finished converging and processing of all single-deck data services of whole ONU and speech business, finish the forwarding of uplink and downlink Business Stream, simultaneously, this core Switching Module can also exchange according to MAC Address, realize MAC address learning, the MAC address aging time can dispose.The core Switching Module filters according to physical port, Ethernet frame head content, and realize the functions such as 802.1Q agreement, VLAN (VLAN) transparent transmission, VLAN conversion, N:1VLAN polymerization, VLAN Trunk (trunking), VLAN filtration, can divide different VLAN and priority-labeled according to ethernet type.Switching Module is realized VLAN Stacking (VLAN the is stacking) function of 802.1ad standard, and the outer TPID parameter of VLAN Stacking ethernet frame is configurable.The above-mentioned functions of core Switching Module is embodied as prior art.

Master cpu is that the system voice signaling is processed, Media Stream agency and system management center, it is the control centre of whole system, the speech business of board plug type ONU adopts VoIP (networking telephone) mode to realize, realize on the master cpu H.248 or the speech business dish on the control of SIP (session initiation protocol) protocol call signaling and the control board plug type ONU, master cpu is finished simultaneously Media Stream and is acted on behalf of forwarding capability, as shown in Figure 6, the ascending voice Media Stream of all speech business dishes, processing the equipment that replaces with through master cpu interflow, to unify IP and MAC Address and flexible exchanging network mutual, downlink media stream is through master cpu shunting processing, replace target MAC (Media Access Control) address, the DSP module that sends in the corresponding speech business dish is carried out Media Stream reduction processing; Master cpu is the system management center simultaneously, realizes the management function such as configuration, fault, performance, safety of whole ONU speech business.

First line of a couplet interface module on the main control unit adopts the demountable structure design, can change flexibly the interface module of the different first line of a couplet patterns of EPON or GPON.First line of a couplet interface module realizes MAC function and DBA (Dynamic Bandwidth Allocation Mechanism), links to each other with the core Switching Module by GMII (gigabit Media Independent Interface) bus.

Speech business dish called after POTS dish is comprised of DSP, Codec and three modules of SLIC, as shown in Figure 4.

The SLIC module is provided with the analog phone line interface, and input, the output that is used for voice flow is processed and plucked, on-hook detects, and this voice flow comprises normal speech business, Modem business and facsimile service, and the functions such as feeding function, overvoltage protection also are provided simultaneously.

The Codec module links to each other with the DSP module by pcm bus, is used for realizing A/D, the D/A conversion of the voice flow between SLIC module and the DSP module, finishes analog voice stream digitized sampling function.

The DSP module is used for the packing of voice flow coding, unpacks processing, can processed voice, Modem and facsimile service stream, and the DSP module also has following function, (1), realize that DTMF detects, produces; (2), finishing Caller ID (caller identification number) generation and detection and various signal tone plays, detects; (3), realize the function treatment such as echo inhibition and voice quality increase.Above-mentioned functions all adopts existing techniques in realizing.

In the ONU speech processes flow process, main control unit and speech business dish communicate by the IP core bus, adopt different privately owned communication protocol according to different events, different event messages is encapsulated in the UDP message with different privately owned communications protocol format, and above-mentioned privately owned communication protocol claims again POTS communication proprietary protocol.

POTS communication proprietary protocol is divided into two large classes according to the direction of transfer of message:

One class is the message that the speech business hair updo is given main control unit, comprise the customer incident that detects, professional dish information, professional plate-like attitude and port status, wherein customer incident comprises that DTMF detects event and fax event etc., professional dish information comprises disc-type and version number, the plate-like attitude comprises whether information in place of dish, and port status comprises port dislodging machine state information etc.;

Another kind of is the message that main control unit sends to the speech business dish, the content that comprises two aspects: the one, after the VOIP signaling that master control protocol analysis module issues SS is resolved, the speech business dish is issued the respective handling order, comprising the operation to establishment, deletion and each attribute of modification passage of DSP passage, put/stop various signal tones etc.; The 2nd, single-deck or port are issued some configuration in control command or the modification dish.

As mentioned above, the communication information between main control unit and the speech business dish is summarised as following five kinds:

Type of message	Parameter	Return value
			Customer incident reports	Slot number slot (1-4), port numbers (1-64), customer incident	0: success; Other: failure reason value
Signal tone is put/is stopped	Slot number slot (1-4), port numbers (1-64), signal tone	0: success; Other: failure reason value
			The operation of DSP channel attributes	Slot number slot (1-4), port numbers (1-64), DSP channel attributes	0: success; Other: failure reason value
The control command of port or single-deck	Slot number slot (1-4), port numbers (1-64), command context	0: success; Other: failure reason value
			The state reporting of port or single-deck	Slot number slot (1-4), port numbers (1-64), state reporting	0: success; Other: failure reason value

Above-mentioned communication information is encapsulated in respectively in the different POTS communication proprietary protocols, and the below is described in detail respectively the parameter of five kinds of message.

(1), customer incident reporting message form is as follows:

Slot number (slot no.) (1 byte)

Port numbers (port no.) (1 byte)

Event id (event ID) (1 byte)

Event id is listed as follows:

Event id	The event title
		EVENT_HAND_ON	On-hook
EVENT_HAND_OFF	Off-hook

EVENT_FLASH	Hooking
		EVENT_0	DTMF	0
EVENT_1	DTMF 1
		EVENT_2	DTMF 2
EVENT_3	DTMF 3
		EVENT_4	DTMF 4
EVENT_5	DTMF 5
		EVENT_6	DTMF 6
EVENT_7	DTMF 7
		EVENT_8	DTMF 8
EVENT_9	DTMF 9
		EVENT_A	DTMF A
EVENT_B	DTMF B
		EVENT_C	DTMF C
EVENT_D	DTMF D
		EVENT_E	DTMF *
EVENT_F	DTMF #
		EVENT_CNG	Fax CNG event
EVENT_CED	Fax CED event
		EVENT_V21	Fax V21 event
EVENT_ANS	Fax ANS event
		EVENT_ANSBAR	Fax ANSBAR event
EVENT_ANSAM	Fax ANSAM event
		EVENT_ANSAMBAR	Fax ANSAMBAR event
EVENT_EOF	Fax EOF event

(2), it is as follows that message format is put/stopped to signal tone:

Slot number (1 byte)

Port numbers (1 byte)

Signal tone ID (1 byte)

Playing duration (4 byte)

Stop duration (4 byte)

Signal tone ID is listed as follows:

Signal tone ID	The signal tone title
		MG_SIG_DL	Dialing tone
MG_SIG_RI	Ring back tone
		MG_SIG_RT	Ring-back tone
MG_SIG_RO	Congestion Tone
		MG_SIG_BT	Busy tone
MG_SIG_WT	Alerting tone
		MG_SIG_CW	The sound such as exhale
MG_SIG_POLE	Antipole
		MG_SIG_ROH	Cui hangs sound
MG_SIG_RDT	Secondary dial tone
		MG_SIG_SCDT	Special dial tone

(3), DSP channel attributes operation information form is as follows:

Slot number (1 byte)

Port numbers (1 byte)

DSP channel attributes (STRUCT DSP_PARM)

According to slot number and port numbers certain DSP passage is carried out the relevant parameter processing, processing operation to the DSP passage comprises establishment passage, deletion passage, revises channel attributes, wherein revise channel attributes and comprise processing to ether packet header, IP packet header, the processing of a plurality of voice relevant parameters such as coded system is switched, transmitting-receiving inter-packet gap, transceiver mode, silence compression, comfortable background sound, echo inhibition, gain, shake.

(4), the control command operation information form of port or single-deck is as follows:

Slot number	Port numbers	Control command
				The 0xff single-deck	0x01 single-deck 0x02 staging business dish 0x10 configuration data 1 (gain adjust) 0x11 configuration data 2 (level parameters) 0x13 configuration data 3 (the POTS parameters) that reset

0x0 ~ 0x63 port numbers

The test of 0x11-Loop test 0x12-Internal Line Test 0x13-ringing-current test 0x14-phone

(5), the state reporting message format of port or single-deck is as follows:

The below makes detailed explanation as an example of Fig. 7 example and in conjunction with agreement H.248 to ONU speech processes flow process, and concrete treatment step is described below:

After A10, POTS dish (speech business dish) detects off-hook event, report off-hook event (being the EVENT_HAND_OFF event in the customer incident reporting message) by the privately owned communication protocol of POTS to main control unit, the SoftSwitch Protocol processing module in the main control unit with standard H.248 agreement report artificial line off-hook event (Notify al/of) to soft-switch platform;

Soft-switch platform issues plays dialing tone signaling Modify cg/dt, after main control unit protocol analysis resume module is finished, put/stop MG_SIG_DL signal in the message by the signal tone in the privately owned communication protocol of POTS, the DSP module is play dialing tone to the corresponding port in the notice POTS dish.

A20, after the subscriber dialing, the DSP module detects dtmf dialing event (being certain event among the EVENT_0～EVENT_F in the customer incident reporting message), report by turn main control unit, main control unit checks that whether this dialer event is complementary with several figure that soft switch issues, number figure can be understood as the number range of dialing by allowing of combining of certain syntax rule, because when the number that the user dials passes on the main control unit, main control unit must judge whether telephone number has been dialled, will use number figure this moment, when numbers match that the user dials among several figure certain dialing rule or can not coupling number figure in dialing rule the time, just think that the number that the user will dial finishes, all numbers of receiving are so far reported soft-switch platform (Notify dd/ce).

A30, soft-switch platform receive collect the digits finish message after, to called transmission ring and Add message, the main control unit of called ONU to above-mentioned message parse after, with the DSP module creation DSP passage (the establishment channel command ID in the DSP channel attributes operation information) in the privately owned communication protocol of the POTS notice POTS dish, revise media channel far-end IP (modification far-end IP order ID and modification value in the DSP channel attributes operation information), revise transceiver mode (modification transceiver mode order ID and modification value in the DSP channel attributes operation information) and ring operation (the MG_SIG_RI signal in the message is put/stopped to signal tone); Soft-switch platform sends Add message (Add ReceiveOnly Local SDP) to caller simultaneously, requires caller to set up corresponding temporary destination node; After the main control unit of caller ONU is finished message parse, set up DSP passage (creating channel command ID in the DSP channel attributes operation information) with the DSP in the privately owned communication protocol notice of the POTS POTS dish, pattern is set to ReceiveOnly (a receipts pattern) (modification transceiver mode order ID and modification value in the DSP channel attributes operation information);

A40, called terminal ringing are simultaneously, SS (soft-switch platform) sends playing RBT message to ONU, and coils to the corresponding ports playing RBT with the privately owned communication protocol of POTS (being that the MG_SIG_RT signal in the message is put/stopped to signal tone) notice POTS by main control unit; SS notice ONU is revised as called IP address with its media channel far-end IP simultaneously, and the attribute of the media channel far-end IP address of opening before resetting; (modification far-end IP order ID and modification value in the DSP channel attributes operation information) can be according to instruction modification media channel far-end IP address attribute when the corresponding proprietary protocol that receives from main control unit for DSP module in the POTS dish;

After A50, called off-hook report soft-switch platform, soft-switch platform sends Modify message to caller ONU, requirement is SendReceive (transceiver mode) with the media channel attribute modification, DSP module in the POTS dish can reset opens the media channel attribute for receiving and dispatching (by receiving modification transceiver mode order ID and the modification value in the DSP channel attributes operation information), after finishing this step, calling and called begin normal talking.

In the above-mentioned ONU speech processes flow process, main control unit and speech business dish communicate by the IP core bus.

In business procession, because main control unit should data streams be processed Media Stream again, therefore, for above-mentioned two kinds of business, main control unit need to separate Media Stream, and the flow process of separation as shown in Figure 6.

After the CPU of B10, main control unit receives packet, judge at first whether this packet is with by UDP message and this UDP message whether vlan information is voice vlan;

To be with vlan information be not voice vlan if this packet of B20 is not UDP message or this UDP message, then processes by other operation flows; Otherwise turn step B30;

B30, main control unit parse source MAC and the source IP address that carries in this message, if source MAC and source IP address all are MAC Address and the IP address of DSP, then turn step B40, otherwise turn step B50;

If B40 source udp port is not the RTP/RTCP port that distributes, direct transparent transmission then, otherwise turn step B60;

If B50 purpose IP is not local media stream IP, direct transparent transmission then, otherwise turn step B80;

B60, parse the real MAC address of purpose IP, if resolve unsuccessfully, then abandon this message, otherwise turn step B70;

B70, message source IP is replaced with local media stream IP, turn step B110;

B80, judging that whether the purpose udp port is the RTP/RTCP port that distributes, is then to turn step B90; Otherwise judge whether local media stream IP and signaling IP are same IP, if it is abandon this message, otherwise direct transparent transmission;

B90, determine the IP of purpose DSP according to the RTP/RTCP port range;

B100, source IP replaced with the IP of purpose DSP;

B110, source MAC is replaced with the MAC Address of main control unit, target MAC (Media Access Control) address is replaced with true target MAC (Media Access Control) address, and transmit.

The above; only be the better embodiment of the present invention, but protection scope of the present invention is not limited to this, task is familiar with the people of this technology in the disclosed technical scope of the present invention; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.

Claims (5)

1. plugboard type FTTB (Fiber To The Building) type ONU, comprise backboard, main control unit and some professional dishes, at least one be the speech business dish for described some professional dishes, it is characterized in that described main control unit and described some professional coiling are inserted into respectively on the backboard and by the IP bus interconnection on the backboard;

The speech business dish is provided with SLIC module, DSP module and Codec module, and described SLIC module is provided with the analog phone line interface, and input, the output that is used for voice flow is processed and plucked, on-hook detects; Described Codec module links to each other with the DSP module by pcm bus, is used for realizing A/D, the D/A conversion of the voice flow between SLIC module and the DSP module; Described DSP module be used for to voice flow encode packing, unpack processing; Speech business stream is finished at main control unit with data traffic flow and is compiled or separate.

2. plugboard type FTTB (Fiber To The Building) type ONU realizes the method for speech business, it is characterized in that handling process is as follows:

The off-hook event that A10, soft-switch platform detect and report according to the speech business dish issues number figure, and the DSP module in the notice speech business dish plays dialing tone for corresponding port;

A20, main control unit check that whether dialer event is complementary with several figure that soft switch issues, if certain the dialer event sequence among this dialer event coupling number figure maybe can not be mated the dialer event sequence among the number figure, then the number sequence of collecting is reported soft-switch platform;

After A30, soft-switch platform are received the number message that reports, to called transmission ALERTING message and Add message, the main control unit of called ONU to above-mentioned message parse after, with the DSP module creation DSP passage in the privately owned communication protocol of the POTS notice speech business dish, revise the media channel far-end IP, revise transceiver mode and ring operation; Soft-switch platform sends Add message to caller simultaneously, require caller to set up corresponding temporary destination node, after the main control unit of caller ONU is finished message parse, set up the DSP passage with the DSP in the privately owned communication protocol notice of the POTS speech business dish, pattern is set to ReceiveOnly;

A40, in called terminal ringing, soft-switch platform sends playing RBT message to ONU, and gives corresponding port playing RBT by the DSP module in the main control unit notice speech business dish; Soft-switch platform notice ONU is revised as called IP address with its media channel far-end IP simultaneously, and the attribute of the media channel far-end IP address of opening before resetting;

After A50, called off-hook event reported soft-switch platform, soft-switch platform was SendReceive with caller media channel attribute modification, and the attribute of the media channel that the DSP in the speech business dish will open before is re-set as transmitting-receiving, and calling and called begin normal talking;

In the above-mentioned ONU speech processes flow process, main control unit and speech business dish communicate by the IP core bus.

3. plugboard type FTTB (Fiber To The Building) type ONU as claimed in claim 2 realizes the method for speech business, it is characterized in that adopting different privately owned communication protocol to communicate according to different events between main control unit and the speech business dish, different events is encapsulated in the UDP message with different privately owned communications protocol format, and described different event comprises that customer incident reports, signal tone is put/stopped, five kinds of the state reportings of the control command of the operation of DSP channel attributes, port or single-deck and port or single-deck.

4. plugboard type FTTB (Fiber To The Building) type ONU as claimed in claim 3 realizes the method for speech business, it is characterized in that,

The slot number, port numbers and the event id parameter that include the caller and called users place in the customer incident reporting message;

Signal tone is put/is stopped slot number, port numbers, signal tone ID, the playing duration that includes the caller and called users place in the message and stops duration parameters;

DSP channel attributes operation information includes slot number, port numbers and the DSP channel attributes parameter at caller and called users place;

The slot number, port numbers and the control command parameter that comprise the caller and called users place in the control command operation information of port or single-deck;

Include in the state reporting message of port or single-deck the caller and called users place slot number, port numbers, order and report content parameters.

5. plugboard type FTTB (Fiber To The Building) type ONU as claimed in claim 2 realizes the method for speech business, it is characterized in that, the step of main control unit separated media stream is as follows:

After the CPU of B10, main control unit receives packet, judge at first whether this packet is with by UDP message and this UDP message whether vlan information is voice vlan;

To be with vlan information be not voice vlan if this packet of B20 is not UDP message or this UDP message, then processes by other operation flows; Otherwise turn step B30;

B30, main control unit parse source MAC and the source IP address that carries in this message, if source MAC and source IP address all are MAC Address and the IP address of DSP, then turn step B40, otherwise turn step B50;

If B40 source udp port is not the RTP/RTCP port that distributes, direct transparent transmission then, otherwise turn step B60;

If B50 purpose IP is not local media stream IP, direct transparent transmission then, otherwise turn step B80;

B60, parse the real MAC address of purpose IP, if resolve unsuccessfully, then abandon this message, otherwise turn step B70;

B70, message source IP is replaced with local media stream IP, turn step B110;

B80, judging that whether the purpose udp port is the RTP/RTCP port that distributes, is then to turn step B90; Otherwise judge whether local media stream IP and signaling IP are same IP, if it is abandon this message, otherwise direct transparent transmission;

B90, determine the IP of purpose DSP according to the RTP/RTCP port range;

B100, source IP replaced with the IP of purpose DSP;

B110, source MAC is replaced with the MAC Address of main control unit, target MAC (Media Access Control) address is replaced with true target MAC (Media Access Control) address, and transmit.

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