CN1126309C - Public affairs board for wavelength division multiplexing light transmission system - Google Patents
Public affairs board for wavelength division multiplexing light transmission system Download PDFInfo
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- CN1126309C CN1126309C CN99117257A CN99117257A CN1126309C CN 1126309 C CN1126309 C CN 1126309C CN 99117257 A CN99117257 A CN 99117257A CN 99117257 A CN99117257 A CN 99117257A CN 1126309 C CN1126309 C CN 1126309C
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Abstract
The present invention provides a public affair board applied to a wave division multiplexing optical transmission system. A signalling is transmitted by a special channel and a protocol controller. The extraction of a conversation channel is automatically finished by a public affair telephone, and interfaces of the conversation channel and a monitoring channel are reduced. Channels can be flexibly configured according to requirements. The selection of a conversation direction and an idle channel can be automatically finished, and outside intervention is not needed. Reliable public affair connection can be provided, and external interfaces of the public affair board can be reduced. The number of equipment is simplified, and realization difficulty is lowered; meanwhile, multiple conversation directions can be supported. The conversation requirements of point-to-point and cross structures can be met. The present invention reserves a space for development henceforth to adopt to different requirements of a system.
Description
The invention belongs to the optical transport technology field, especially relate to wavelength division multiplexing (WDM) optical transport technology.
In the WDM optical transmission system, the effect of official telephone is to carry out the public affair contact, requires its equipment amount little, the reliability height.Particularly, exactly speech signal coding is become PCM signal (2.048MHz comprises 32 channels), be transferred to another website, realize the conversation between two websites by transmission line.In existing WDM standard, require official telephone to have addressing calling, the calling of group location and broadcast ﹠ call mode, the channel of distributing to the public affair use is generally fewer.
In existing various official telephones, because operable channel is less, so all adopt channel associated signaling to transmit signaling, the shared channel of signaling and voice signal just, this reliability that makes signaling transmit is not high, often be subjected to the interference of random code and voice signal, and cause call completing rate to reduce.And the channel that uses of official telephone is all by the responsible extraction of monitor channel (being responsible for and the decomposition of the interface of light signal and PCM signal and framing etc.), make the Order wire unit external interface very complicated, the interface data line is a lot, has also increased the treating capacity and the complexity of monitor channel simultaneously.In addition, the official telephone among the existing WDM is all only supported the conversation of both direction, when two network generation right-angled intersections, can not be implemented on the four direction and converse.
Purpose of the present invention just provides a kind of Order wire unit that is applied in the Wave division multiplexing optical transmission system, reliable public affair contact can be provided, reduce the external interface of Order wire unit, the simplified apparatus amount, reduce and realize difficulty, can support simultaneously a plurality of correspondent to, be development headspace from now on, with the different needs of adaptive system.
The present invention also provides a kind of Order wire unit that is applied in the Wave division multiplexing optical transmission system, comprising:
The PCM coding/decoding module is used for finishing the encoding and decoding of voice signal;
The control logic phase adjusting module is used for finishing the control that sheet is translated various logics such as sign indicating number selectively, and the phase place adjustment that clock and signal are provided for each module;
The phone interface circuit is used for finishing functions such as dislodging machine testing, two or four line conversions;
The DTMF digit receiver is used for receiving the number of dialling on the telephone set;
The CPU control unit is used for controlling the work of official telephone, and detects various operating states in real time, and various warning information and incident are in time reported webmaster;
It is characterized in that it also comprises:
The exchanges data circuit is used for realizing extraction, framing and the function of exchange of channel;
Protocol controller is used for sending and the reception signaling;
Aforesaid Order wire unit is characterized in that described exchanges data circuit has a buffer, and buffer is made up of a plurality of buffer units, earlier input signal is written in the buffer during input; The data of a channel of a buffer unit storage; During output, can only export the data in some buffer unit, also can do any adjustment on the order,, the channel in the PCM signal of input be carried out combination in any to realize the extraction and the exchange of PCM channel.
Aforesaid Order wire unit, what it is characterized in that described protocol controller use is the signaling dedicated channel.
Aforesaid Order wire unit is characterized in that there are a transmit buffer and a reception buffer in described protocol controller inside, during transmission, signaling is write transmit buffer, and protocol controller is inserted into signaling on some channels of PCM signal automatically; During reception, after protocol controller is received signaling data, it is stored in the reception buffer, notifies CPU to read then.
Aforesaid Order wire unit is characterized in that, it also comprises conference circuit, is used for realizing that call out the group location is conference telephone capabilities.
Aforesaid Order wire unit, its feature is that also it also comprises:
The routing table memory is used for storing routing table, our station telephone number, generally calls information such as password, and routing table comprises the telephone number of other each website and the route of being led to these websites by our station;
The space switching circuit is used for selecting one tunnel output from the multichannel input signal.
Aforesaid Order wire unit is characterized in that being connected with monitor channel with 4 road protocol controllers by 4 road PCM signals, when two network generation right-angled intersections, can realize 4 conversations on the direction.
Aforesaid Order wire unit, its feature also be, by increasing the quantity of protocol controller and PCM data wire, can support more correspondent to.
Order wire unit provided by the invention has solved the not high problem of signaling transmission reliability in the prior art, the phenomenon of having avoided false connection maybe can not connect.Because the channel abstraction function has been accomplished on the Order wire unit, makes that the Order wire unit external interface is more succinct, has alleviated the pressure of monitor channel, also brought very big flexibility simultaneously to Order wire unit.Simultaneously, Order wire unit can support a plurality of correspondent to, support the needs of various ways networking (as the right-angled intersection networking).
Now in conjunction with the accompanying drawings the specific embodiment of the present invention is done further detailed description.
What Fig. 1 provided is the structured flowchart of Order wire unit
Fig. 2 has provided the general structured flowchart of existing Order wire unit.
What Fig. 3 provided is the annexation of each circuit in the Order wire unit
Fig. 4 provided Order wire unit on 4 directions with the signal annexation of monitor channel
Fig. 5 has provided the structural representation of protocol controller 103 among Fig. 1.
Fig. 6 has provided the structural representation of exchanges data circuit 101 among Fig. 1.
As shown in Figure 1 and Figure 2, the Order wire unit that uses in the existing official telephone does not have the channel abstraction function, brings after must being extracted by monitor channel again.And because signaling is not used dedicated channel, but, therefore can not transmit signaling by the use agreement controller with the shared channel of speech data, because protocol controller must use dedicated channel to transmit signaling; And owing to often occur with the identical data of signaling in the speech data, the reliability that causes signaling to transmit is not high.And Order wire unit provided by the invention adopts exchanges data circuit extraction channel and framing, and the dedicated channel command transmitting, finishes the transmission and the reception of signaling by protocol controller.
As shown in Figure 1, exchanges data circuit 101 is finished the extraction of channel and the framing of PCM signal, and is connected with monitor channel 001; The effect of PCM coding-decoding circuit 102 is encoding and decoding of finishing voice signal, 102 of PCM coding-decoding circuits use the zero channel (being first channel) in the PCM signal to carry out encoding and decoding, during coding, speech signal coding is gone to zero channel, during decoding, reduction of data on zero channel is become voice signal: protocol controller 103 is used for finishing the transmission and the reception of signaling, and the correspondent that can support according to official telephone is to using a plurality of protocol controllers, corresponding one of each direction; The function of conference circuit 104 is when holding a meeting phone, and selected channel is carried out the numeral stack, makes everyone can both hear other people's speech, and the employing of conference circuit 104 makes the present invention have the group location and calls out (conference telephone) function; Phone interface circuit 105 is finished the dislodging machine testing, functions such as two or four line conversions, and be connected with telephone set 003; The function of DTMF digit receiver 106 is to receive the number of dialling on the phone; The effect of space switching circuit 107 is to select one tunnel output from the multichannel input signal; Routing table memory 108 is used for storing routing table, our station telephone number, generally calls information such as password; CPU control unit 109 is used for controlling the work of official telephone, and detects various operating states in real time, and various warning information and incident are in time reported webmaster; Control logic and phase correction module 110 are finished the control that sheet is translated various logics such as sign indicating number selectively, and for each module provides the phasing of clock and signal, and be connected with network management interface 002.
Order wire unit provided by the invention has been realized the channel abstraction function by using exchanges data circuit 101, but also can receive the channel that is extracted by monitor channel simultaneously, has so both guaranteed favorable compatibility, has significantly reduced the interface data line with monitor channel again.For example, suppose to have 3 channels to use for public affair, if Order wire unit does not have the channel abstraction function, and extract channel by monitor channel, then on each direction, exigencies of the service 6 data lines (send and receive each 3) link to each other with monitor channel, if support 4 correspondent to, then 4 directions need 24 altogether; But adopt Order wire unit provided by the invention, no matter use what channels, each direction all only needs 2 (one receives one), and 4 directions only need 8 data lines.It also is the prerequisite that adopts the dedicated channel command transmitting that Order wire unit has the channel abstraction function.
Further perfect along with various standards, the channel of distributing to the public affair use may change, wavelength-division multiplex system itself also may be adjusted the channel that public affair is used for a certain reason simultaneously, but this Order wire unit can according to system's needs adjust channel that official telephone uses by software flexible and not needs change hardware, this adjustment comprises the adjustment of channel quantity and the adjustment on the order.
Order wire unit adopts dedicated channel to transmit signaling, and this dedicated channel is used by protocol controller 103, only is used for transmitting signaling data.The input and output of protocol controller all are the PCM signals, but only use one of them channel (for this Order wire unit, what this channel referred to is exactly dedicated channel) to transmit and receive data.Usually, fixing data of this channel output; When sending signaling data, protocol controller adds frame head, postamble and check code for this signaling data, is put on the channel then and sends.During reception, detect frame head and postamble after, data are put in the reception buffer, correct through verification, just notify CPU to read.Because protocol controller is a special circuit, and uses dedicated channel again, can guarantee the correctness that signaling data sends and receives, so the reliability that adopts dedicated channel and protocol controller to make signaling transmit is very high.
Order wire unit provided by the invention can support a plurality of correspondent to, correspondent to choose by CPU and determine according to routing table, reduced dependence to system.Routing table memory 108 on the Order wire unit is used for storing routing table, our station number, generally calls password, generally calls information such as whether allow.When powering on, webmaster downloads to routing table on the memory of Order wire unit, and webmaster can be adjusted at any time to these information, and then downloads and give Order wire unit; During conversation, Order wire unit is determined the direction of transfer of signaling and speech data according to routing table.Webmaster can be adjusted routing table at any time according to the needs of system, satisfies the demand of the network of different topology structure to public affair.The user can also adjust arbitrarily telephone number, the function of generally calling of each website is controlled, to determine which website has this authority.
Be the convenience that further improves reliability and use, this Order wire unit has designed two and has overlapped independently phone system on a plate, can support two phones simultaneously, and two phone functions are just the same.For meeting user's custom, the using method of official telephone also is duplicate with plain old telephone.
Fig. 3 shows the concrete annexation of various circuit in the official telephone and concrete communication process.
The flow process that sends signal is as follows;
K31 and K32 represent two telephone wires.K31 and K32 at first are connected to phone interface circuit 105,105 can finish dislodging machine testing and the conversion of two or four lines, balanced signal in two telephone wires is separated into input and output signal, and wherein output signal K33 gives DTMF digit receiver 106 and PCM coding-decoding circuit 102 respectively.DTMF digit receiver 106 can receive the number of dialling on the telephone set at any time like this; PCM coding-decoding circuit 102 voice signal sent here of dialogue machine is at any time encoded, and the data K35 behind the coding delivers to exchanges data circuit 101.The PCM output signal K37 of protocol controller 103 also delivers to exchanges data circuit 101, by 101 signaling channel among the K37 and the voice channel among the K35 is carried out framing, gives monitor channel then, by monitor channel signal is delivered on the optical fiber and is transmitted.Because the digital signal that coding-decoding circuit 102 receives and sends must be positioned on the zero channel of PCM, and the channel that system assignment is used to public affair is uncertain, all must be so receive and send through the exchange of exchanges data circuit 101.The effect of space switching circuit 107 is to select one the tunnel and give phone interface circuit 105 from the signal of input, and can control input signals and the connection and turn-off time of the signal of output.
The input signal of space switching circuit 107 has the sine wave signal of 450Hz and the voice signal that PCM coding-decoding circuit 102 decodes, and which specifically selects then determine according to the state of phone.If phone is in states such as ring-back tone, dialing tone, busy tone, then select the sine wave of 450Hz, by controlling 107 make-and-break time, can produce various signal tones.For example, per 0.35 second gating turn-offed in 0.35 second, and so circulation will produce busy tone.If phone is in talking state, then select voice signal to give phone.The 450Hz sinusoidal signal is to be produced and obtained through shaping by control logic and phase-correcting circuit (110 modules among Fig. 1).
When outwards calling, at first judge off hook state by phone interface circuit 105, receive by DTMF digit receiver 106 then and dial the number that cries, CPU searches routing table according to number from routing table memory 108, seek idle voice channel simultaneously, then signaling data is written in the protocol controller of respective direction; Voice signal is delivered to exchanges data circuit 101,101 after through PCM coding-decoding circuit 102 codings and is given the other side after with voice signal and signaling framing.After the other side receives signaling, restore voice signal, promptly heard the sound of our station.
The flow process of received signal is as follows:
Give exchanges data circuit 101 and protocol controller 103 respectively by 4 road PCM signals and clock signal that monitor channel is sent here.103 are responsible for receiving signaling; 101 are responsible for comprising the channel extraction of voice signal, give the PCM coding-decoding circuit 102 decodings then.Decoded analog voice signal is delivered to space division circuit 107, by 107 controls voice signal is delivered to phone interface circuit 105, gives phone then.Conference circuit 104 has one tunnel input to be connected with exchanges data circuit 101 with one tunnel output PCM signal.When holding a meeting phone, by exchanges data circuit 101 voice data exchange that each side sends here is gone to one road PCM signal, give conference circuit 104, superpose by the speech data of conference circuit 104 each side, and then, transfer to 102 decodings of PCM coding-decoding circuit by exchanges data circuit 101 extraction stack channels.
When the other side dials when being our station, protocol controller 103 receives the signaling that the other side down send here.The many information that comprising the other side in the signaling, comprise the voice channel of telephone number and use etc., CPU extracts voice channel according to these information designation data switched circuits 101 and gives PCM coding-decoding circuit 102, restore analog voice signal, deliver on the phone by space division circuit 107 and user interface circuit 105, so just heard the other side's sound.
Order wire unit provided by the invention support a plurality of correspondent to.Fig. 4 show official telephone be how to realize with 4 directions on website realize conversation.K41, K42, K43, K44 are the PCM signals of the four direction sent here of monitor channel, comprising signaling and speech data that the other side sends here in these signals, these four input signals are given protocol controller 103 and exchanges data circuit 101 respectively, the signaling content that CPU receives according to protocol controller, extract voice by exchanges data circuit 101 and go out channel, send to decoding then.K45, K46, K47, K48 are 4 road PCM signals that official telephone is given monitor channel, it is an exchanges data circuit 101 with the result behind the PCM signal framing of the PCM signal of protocol controller 103 outputs and 102 outputs of PCM coding-decoding circuit, and it is comprising one's own side's signaling and voice signal.
The official telephone that provides according to Fig. 4 on 4 directions with the signal annexation of monitor channel as can be known, only needing increases protocol controller and holding wire, just can increase the bearing of trend of public affair; Reduce protocol controller and holding wire, just can reduce bearing of trend.Present official telephone has four bearing of trends, is fully to determine according to the needs of right-angled intersection system, can support more bearing of trend as required in the practice.And this change is quite simple, and its reliability also is can be guaranteed.
Fig. 5 shows the structural representation of protocol controller 103.K51, K52 be input, the output PCM signal of presentation protocol controller respectively, the data wire of K53 presentation protocol controller.Input PCM signal K51 is at first detected by the packet testing circuit, if detect signaling data, just data is put in the reception buffer, and notice CPU, data are read away by data wire K53 by CPU.When CPU need send signaling, just signaling data is write in the transmit buffer by data wire K53, after the packet transtation mission circuit adds frame head, postamble and check code with signaling data, be inserted into then in the channel of K52 and send.
Fig. 6 has provided the structural representation of exchanges data circuit 101.K61, K62 represent the input and output PCM signal of exchanges data circuit respectively.In the buffer that input signal K61 is at first stored, buffer is formed (only having drawn 8 among the figure) by 32 buffer units, the data of a channel of a buffer unit storage; During output, the data in the buffer unit are read, be inserted into then in the channel of output signal K62 and go; Buffer unit read the order be arbitrarily, so just realized channel switch and extraction to input signal.The situation of one road input signal of only having drawn among the figure if the input of N road is arranged, then has 32 * N buffer unit; During output, the order of reading of buffer unit remains arbitrarily, like this, has just realized the framing function to the multichannel input signal.
Claims (6)
1, a kind of Order wire unit that is applied in the Wave division multiplexing optical transmission system comprises:
Pulse code modulation coding/decoding module (102) is used for finishing the encoding and decoding of voice signal;
Control logic phase adjusting module (110) is used for finishing the control that sheet is translated various logics such as sign indicating number selectively, and the phase place adjustment that clock and signal are provided for each module;
Phone interface circuit (105) is used for finishing functions such as dislodging machine testing, two or four line conversions;
Dual-tone multifrequency digit receiver (106) is used for receiving the number of dialling on the telephone set;
Central processing unit control unit (109) is used for controlling the work of official telephone, and detects various operating states in real time, and various warning information and incident are in time reported webmaster;
It is characterized in that it also comprises:
Exchanges data circuit (101) is used for realizing extraction, framing and the function of exchange of channel;
Protocol controller (103) uses the signaling dedicated channel to send and receives signaling.
There are a transmit buffer and a reception buffer in described protocol controller (103) inside, during transmission, signaling is write transmit buffer, and protocol controller is inserted into signaling on some channels of pulse code modulation signal automatically; During reception, after protocol controller is received signaling data, it is stored in the reception buffer, notifies central processing unit to read then.
2, Order wire unit as claimed in claim 1 is characterized in that described exchanges data circuit (101) has a buffer, and buffer is made up of a plurality of buffer units, earlier input signal is written in the buffer during input; The data of a channel of a buffer unit storage; During output, can only export the data in some buffer unit, also can do any adjustment on the order,, the channel in the pulse code modulation signal of input be carried out combination in any to realize the extraction and the exchange of pulse code modulation channel.
3, Order wire unit as claimed in claim 1 is characterized in that, it also comprises conference circuit (104), is used for realizing that call out the group location is conference telephone capabilities.
4, Order wire unit as claimed in claim 1, its feature is that also it also comprises:
Routing table memory (108) is used for storing routing table, our station telephone number, generally calls information such as password, and routing table comprises the telephone number of other each website and the route of being led to these websites by our station;
Space switching circuit (107) is used for selecting one tunnel output from the multichannel input signal.
5, as any described Order wire unit in the claim 1 to 4, it is characterized in that being connected with monitor channel with 4 road protocol controllers, when two network generation right-angled intersections, can realize 4 conversations on the direction by 4 road pulse code modulation signals.
6, as any described Order wire unit in the claim 1 to 4, its feature also is, by increasing the quantity of protocol controller and pulse code modulation data line, can support more correspondent to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99117257A CN1126309C (en) | 1999-12-02 | 1999-12-02 | Public affairs board for wavelength division multiplexing light transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99117257A CN1126309C (en) | 1999-12-02 | 1999-12-02 | Public affairs board for wavelength division multiplexing light transmission system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1298237A CN1298237A (en) | 2001-06-06 |
| CN1126309C true CN1126309C (en) | 2003-10-29 |
Family
ID=5279893
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN99117257A Expired - Fee Related CN1126309C (en) | 1999-12-02 | 1999-12-02 | Public affairs board for wavelength division multiplexing light transmission system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1126309C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100366021C (en) * | 2004-10-22 | 2008-01-30 | 华为技术有限公司 | System and method for optical transmission subnetwork communicating with external subnetwork using official telephone |
| CN101389110B (en) * | 2008-08-07 | 2011-10-26 | 中兴通讯股份有限公司 | Apparatus and method for implementing official call by master control board |
| CN101355601B (en) * | 2008-08-29 | 2011-05-11 | 京信通信系统（中国）有限公司 | Network official telephone for digital microwave system and implementing method thereof |
-
1999
- 1999-12-02 CN CN99117257A patent/CN1126309C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1298237A (en) | 2001-06-06 |
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Address after: 518057 Department of law, Zhongxing building, South hi tech Industrial Park, Nanshan District hi tech Industrial Park, Guangdong, Shenzhen Patentee after: ZTE Corporation Address before: 518057 Zhongxing building, science and technology south road, Nanshan District hi tech Industrial Park, Guangdong, Shenzhen Patentee before: Zhongxing Communication Co., Ltd., Shenzhen City |
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Granted publication date: 20031029 Termination date: 20171202 |