CN101557544A - Module connecting 2B+D scheduling desks by E1 line and method - Google Patents
Module connecting 2B+D scheduling desks by E1 line and method Download PDFInfo
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- CN101557544A CN101557544A CNA2009100844451A CN200910084445A CN101557544A CN 101557544 A CN101557544 A CN 101557544A CN A2009100844451 A CNA2009100844451 A CN A2009100844451A CN 200910084445 A CN200910084445 A CN 200910084445A CN 101557544 A CN101557544 A CN 101557544A
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Abstract
The invention discloses a module connecting 2B+D scheduling desks by an E1 line and a method, belonging to the technical field of data transmission. The module comprises 2B+D interfaces, a 2B+D and E1 conversion unit and an E1 interface which are connected in sequence; the method for connecting the scheduling desks comprises the following steps of: randomly selecting three non-zero time slots of the E1 line and leading signals of two B channels and signals of one D channel to be respectively transmitted by the three selected time slots along the E1 line; the method for connecting 2 to 10 scheduling desks is as follows: the time slots 1, 2 and 3 of the E1 line are respectively used for transmitting 2B+D signals of the first scheduling desk; the time slots 4, 5 and 6 are respectively used for transmitting 2B+D signals of the second scheduling desk; and so forth, till the 31 time slots of the E1 line are distributed completely. The invention replaces the twisted pair cable with the E1 line to connect 2B+D scheduling desks and transmits 2B+D signals, thus leading the effective distance of signal transmission to be increased.
Description
Technical field
The invention belongs to technical field of data transmission, relate in particular to a kind of module and method that connects the 2B+D dispatching desk by the E1 circuit.
Background technology
At present, the voice scheduling platform that uses on the market mostly adopts the data transfer mode of 2B+D.In this transmission means, each bandwidth of B channel is 64kbps, and the bandwidth of D channel is 16kbps, and like this, B channel per second is by 64k bit data, and D channel per second is by 16k bit data.2B+D adopts the medium of twisted-pair feeder as transfer of data usually.Yet the twisted-pair feeder transmission range is general maximum about 100 meters, and this makes the transmission range based on the 2B+D signal of twisted-pair feeder transmission be subjected to very big influence, thereby has limited the application of dispatching desk.Adopt twisted-pair feeder interconnecting device or multiplying arrangement, can increase the cost that dispatching desk is disposed, also can influence the 2B+D quality of signals of transmission.
The E1 circuit is that the distance of its transmission is greater than twisted-pair feeder by one section link of pcm encoder.The frame length of E1 data is 256 bit, is divided into 32 time slots, and a time slot is 8 bit.Per second has the frame of 8k E1 data by interface, and each time slot of per second is by 8k x 8=64k bit, and 32 time slot per seconds are by 32x 64k bit=2M bit.E1 circuit transmission range is long, and the B channel width of time slot bandwidth and 2B+D is identical, and is the integral multiple of D channel width, and this makes and adopts E1 to replace twisted-pair feeder transmission 2B+D signal to become possibility with the applications distances of prolongation dispatching desk.
Summary of the invention
The objective of the invention is to, transmit the 2B+D data at the twisted-pair feeder that generally uses, the problem that its effective propagation path is short proposes a kind of module and method by E1 circuit connection 2B+D dispatching desk, thereby improves the transmission range of 2B+D data.
Technical scheme of the present invention is that a kind of module by E1 circuit connection 2B+D dispatching desk is characterized in that described module comprises 2B+D interface, 2B+D and E1 converting unit and E1 interface; Wherein, the 2B+D interface is connected with the E1 converting unit with 2B+D, is used for being connected with twisted-pair feeder transmission 2B+D signal; 2B+D links to each other with the E1 interface with the E1 converting unit, is used for the 2B+D conversion of signals is become the E1 signal, perhaps the E1 conversion of signals is become the 2B+D signal; The E1 interface is used for being connected with the E1 circuit, transmission E1 signal.
Described module also comprises time-division switching chip and E1 forwarding interface; Wherein, the time-division switching chip is connected with the E1 forwarding interface with the E1 interface respectively, is used for the E1 signal of the default time slot of transmission between E1 interface and E1 forwarding interface; The E1 forwarding interface is used for being connected with the E1 circuit.
A kind of method by E1 circuit connection 2B+D dispatching desk is characterized in that described method comprises the following steps:
Step 1: choose 2 modules, be decided to be first module and second module respectively by E1 circuit connection 2B+D dispatching desk;
Step 2: the 2B+D interface of first module is connected with the network side management channel by twisted-pair feeder, and the E1 interface of first module is connected with an E1 transmission equipment by the E1 circuit;
Step 3: the 2B+D interface of second module is connected with dispatching desk by twisted-pair feeder, and the E1 interface of second module is connected with the 2nd E1 transmission equipment by the E1 circuit; The one E1 transmission equipment connects the transmission that the 2nd E1 transmission equipment is used to realize the E1 circuit;
Step 4: the 2B+D of first module becomes the E1 signal with the E1 converting unit with the 2B+D conversion of signals that the network side management channel transmits, and by the transmission of E1 circuit; Be specially, select 3 non-0 time slots of E1 circuit arbitrarily, and the signal of 2 B channels and the signal of 1 D channel are transmitted along the E1 circuit by 3 selected time slots respectively;
Step 5: the 2B+D of second module becomes the 2B+D signal with the E1 converting unit with the E1 conversion of signals that the E1 circuit transmits, and is transferred to dispatching desk by twisted-pair feeder;
Step 6: dispatching desk receives the 2B+D signal, handles.
A kind of method by 2-10 dispatching desk of E1 circuit connection is characterized in that described method comprises the following steps:
Step 1: choose the module number that connects the 2B+D dispatching desk by the E1 circuit according to the quantity of dispatching desk, corresponding 1 module that connects the 2B+D dispatching desk by the E1 circuit of each dispatching desk;
Step 2: dispatching desk is named, difference called after first dispatching desk, second dispatching desk, and according to dispatching desk quantity and the like;
Step 3: to the module name that the E1 circuit connects the 2B+D dispatching desk of passing through of each dispatching desk correspondence, module called after first module of passing through E1 circuit connection 2B+D dispatching desk of the first dispatching desk correspondence, module called after second module of passing through E1 circuit connection 2B+D dispatching desk of the second dispatching desk correspondence, and the like;
Step 4: the E1 circuit is linked to each other with the E1 interface of first module, and the 2B+D interface of first module links to each other with first dispatching desk by twisted-pair feeder, and the E1 forwarding interface of first module links to each other with the E1 interface of second module;
Step 5: since second module, the 2B+D interface of each module links to each other with corresponding with it dispatching desk by twisted-pair feeder, and the E1 forwarding interface of each module links to each other with the E1 interface of next module by the E1 circuit;
The time slot 1,2 and 3 of step 6:E1 circuit is respectively applied for the 2B+D signal of transmission first dispatching desk, and time slot 4,5 and 6 is respectively applied for the 2B+D signal of transmission second dispatching desk, and the like, finish until the time slot allocation of E1 circuit.
Effect of the present invention is, replaces twisted-pair feeder connection 2B+D dispatching desk and transmits the 2B+D signal by the E1 circuit, makes the coverage of signal transmission increase; Simultaneously,, therefore connect 2-10 dispatching desk, made full use of the bandwidth of E1 circuit, also realized the long range signals transmission of many dispatching desks with an E1 circuit because the E1 line bandwidth is higher than the 2B+D channel.
Description of drawings
Fig. 1 is the structure chart that connects the module of 2B+D dispatching desk by the E1 circuit;
Fig. 2 is the another kind of structure chart that connects the module of 2B+D dispatching desk by the E1 circuit;
Fig. 3 is the method schematic diagram that network side connects the 2B+D dispatching desk; Wherein, (a) being the method schematic diagram of network side by twisted-pair feeder connection 2B+D dispatching desk, is that network side passes through the method schematic diagram that the E1 circuit connects the 2B+D dispatching desk (b);
Fig. 4 is the method schematic diagram that connects 2-10 dispatching desk by the E1 circuit.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment is elaborated.Should be emphasized that following explanation only is exemplary, rather than in order to limit the scope of the invention and to use.
Fig. 1 is the structure chart that connects the module of 2B+D dispatching desk by the E1 circuit.Among Fig. 1, the module by E1 circuit connection 2B+D dispatching desk comprises 2B+D interface, 2B+D and E1 converting unit and E1 interface.Wherein, the 2B+D interface is connected with the E1 converting unit with 2B+D, is used for being connected with external equipment by twisted-pair feeder 101 transmission 2B+D signal; 2B+D links to each other with the E1 interface with the E1 converting unit, and its effect is that the 2B+D conversion of signals is become the E1 signal, also the E1 conversion of signals can be become the 2B+D signal simultaneously; The E1 interface is connected with external equipment by E1 circuit 102, transmission E1 signal.
Fig. 2 is the another kind of structure chart that connects the module of 2B+D dispatching desk by the E1 circuit.Among Fig. 2, the structure that connects the module of 2B+D dispatching desk by the E1 circuit of the present invention can also comprise time-division switching chip and E1 forwarding interface.Wherein, the time-division switching chip is connected with the E1 forwarding interface with the E1 interface respectively, is used for the E1 signal of the default time slot of transmission between E1 interface and E1 forwarding interface.Particularly, when the E1 interface receive be full-time crack signal (being that time slot 0-time slot 31 all has signal) time, if the E1 forwarding interface is only wished the signal of forwarding time slot 4-time slot 31, then can control the time-division switching chip, default is carried out two-way connection to time slot 4-time slot 31, time slot 0-time slot 3 just can not pass through the time-division switching chip like this, and the signal that the E1 forwarding interface comes out has also just had only the signal of time slot 4-time slot 31.The E1 forwarding interface is used for being connected with other E1 circuits, connects other equipment.
Fig. 3 is the method schematic diagram that network side connects the 2B+D dispatching desk; Wherein, Fig. 3 (a) is network side connects the 2B+D dispatching desk by twisted-pair feeder a method schematic diagram.Common 2B+D dispatching desk is connected with network side by twisted-pair feeder 101.This connected mode transmission range is limited.Fig. 3 (b) is that network side passes through the method schematic diagram that the E1 circuit connects the 2B+D dispatching desk, and its step is as follows:
Step 1: choose 2 modules, be decided to be first module and second module respectively by E1 circuit connection 2B+D dispatching desk.
Step 2: the 2B+D interface of first module is connected with the network side management channel by twisted-pair feeder 101, and the E1 interface of first module is connected with an E1 transmission equipment by E1 circuit 102.
Step 3: the 2B+D interface of second module is connected with dispatching desk by twisted-pair feeder, and the E1 interface of second module is connected with the 2nd E1 transmission equipment by E1 circuit 102; The one E1 transmission equipment connects the transmission that the 2nd E1 transmission equipment is used to realize E1 circuit 102.
Step 4: the 2B+D of first module becomes the E1 signal with the E1 converting unit with the 2B+D conversion of signals that the network side management channel transmits, and by the transmission of E1 circuit; Be specially, select 3 non-0 time slots of E1 circuit arbitrarily, and make the signal of 2 B channels and the signal of 1 D channel pass through 3 selected slot transmission respectively.Particularly, in the present embodiment, choose time slot 1,2 and 3, because 0 time slot generally is intended for the frame synchronization use, therefore common 0 time slot is not used.The signal that makes 2 B channels is respectively by time slot 1 and time slot 2 transmission, and the signal of 1 D channel has been realized the transmission of 2B+D signal by the E1 circuit like this by time slot 3 transmission.
Step 5: the 2B+D of second module becomes the 2B+D signal with the E1 converting unit with the E1 conversion of signals that the E1 circuit transmits, and is transferred to dispatching desk by twisted-pair feeder.In second module, after the E1 interface obtains the signal of E1 circuit 102, the signal of time slot 1,2 and 3 is sent into 2B+D and E1 converting unit, E1 signal with time slot 1,2 and 3 changes into the signal of 2 B channels and the signal of 1 D channel respectively, by 2B+D interface and twisted-pair feeder 101, the signal of 2 B channels and the signal of 1 D channel are sent into dispatching desk again.
Step 6: dispatching desk receives the 2B+D signal, handles accordingly.
By above-mentioned passable, can connect 1 2B+D dispatching desk by the E1 circuit, realize that the E1 circuit replaces twisted-pair feeder to carry out the transfer of data of 2B+D dispatching desk.But, use an E1 circuit to connect 1 2B+D dispatching desk, only used 3 in 32 time slots of E1 circuit, caused the serious waste of E1 circuit, based on aforementioned invention, the present invention proposes to connect by an E1 circuit method of 2-10 dispatching desk.Because the signal of 2 B channels of each 2B+D dispatching desk and the signal of 1 D channel can occupy 1 time slot respectively, so a 2B+D dispatching desk occupies 3 time slots of E1 circuit, and E1 circuit 32 has individual time slot, wherein 0 time slot can not use, and therefore 31 time slots can connect 10 2B+D dispatching desks at most simultaneously.
Fig. 4 is the method schematic diagram that connects 2-10 dispatching desk by the E1 circuit.The concrete steps that connect the method for a plurality of dispatching desks by the E1 circuit are:
Step 1: choose the module number that connects the 2B+D dispatching desk by the E1 circuit according to the quantity of dispatching desk, corresponding 1 module that connects the 2B+D dispatching desk by the E1 circuit of each dispatching desk.If select to connect 2 dispatching desks, then need 2 modules that connect the 2B+D dispatching desk by the E1 circuit by the E1 circuit; If select to connect 3 dispatching desks by the E1 circuit, then need 3 modules by E1 circuit connection 2B+D dispatching desk, and the like.
Step 2: dispatching desk is named, difference called after first dispatching desk, second dispatching desk, and according to dispatching desk quantity and the like.
Step 3: to the module name that the E1 circuit connects the 2B+D dispatching desk of passing through of each dispatching desk correspondence, module called after first module of passing through E1 circuit connection 2B+D dispatching desk of the first dispatching desk correspondence, module called after second module of passing through E1 circuit connection 2B+D dispatching desk of the second dispatching desk correspondence, and the like.
Step 4: the E1 circuit is linked to each other with the E1 interface of first module, and the 2B+D interface of first module links to each other with first dispatching desk by twisted-pair feeder, and the E1 forwarding interface of first module links to each other with the E1 interface of second module.
Step 5: since second module, the 2B+D interface of each module links to each other with corresponding with it dispatching desk by twisted-pair feeder, and the E1 forwarding interface of each module links to each other with the E1 interface of next module by the E1 circuit.
The time slot 1,2 and 3 of step 6:E1 circuit is respectively applied for the 2B+D signal of transmission first dispatching desk, and time slot 4,5 and 6 is respectively applied for the 2B+D signal of transmission first dispatching desk, and the like, finish until the time slot allocation of E1 circuit.By the time-division switching chip in the module of E1 circuit connection 2B+D dispatching desk, the time slot that default E1 interface and E1 forwarding interface can transmit, control dispatching desk taking to time slot.The time-division switching chip can adopt 8980,90826 chips such as grade.Following table takies E1 circuit time slot table for each dispatching desk.
| Dispatching desk | Take time slot |
| First dispatching desk | 1、2、3 |
| Second dispatching desk | 4、5、6 |
| The 3rd dispatching desk | 7、8、9 |
| The 4th dispatching desk | 10、11、12 |
| The 5th dispatching desk | 13、14、15 |
| The 6th dispatching desk | 16、17、18 |
| The 7th dispatching desk | 19、20、21 |
| The 8th dispatching desk | 22、23、24 |
| The 9th dispatching desk | 25、26、27 |
| The tenth dispatching desk | 28、29、30 |
Table 1: dispatching desk takies the E1 circuit time slot table of comparisons
In the practical application, also the time slot that dispatching desk takies can be set flexibly, not taken by 2 or 2 above dispatching desks as long as guarantee same time slot.
In the step 6, when first dispatching desk uses the time slot 1,2 and 3 of E1 circuit to transmit the 2B+D signals, the time-division switching chip of first module is preset diconnected time slot 4-time slot 31, thereby makes 1,2 and 3 of time slots serve first dispatching desk, and is not taken by other dispatching desks.So as shown in Figure 4, the E1 circuit 401 that passes in and out the E1 interface of first module is full-time gap line, and the E1 circuit 402 of the turnover E1 forwarding interface and the E1 interface of turnover second module is that time slot 0,1,2,3 is empty, the E1 circuit that other time slots can be used.
When second dispatching desk used time slot 4,5, the 6 transmission 2B+D signals of E1 circuit, the time-division switching chip of second module was preset diconnected time slot 7-time slot 31, thereby makes 4,5 and 6 of time slots serve second dispatching desk, and is not taken by other dispatching desks.Therefore as shown in Figure 4, the E1 circuit 403 that passes in and out the E1 forwarding interface of second module is that time slot 0,1,2,3,4,5,6 is sky, the E1 circuit that other time slots can be used.
If the E1 circuit also connects other 2B+D dispatching desk, similar second dispatching desk of its connected mode; The time-division switching chip predetermined manner of Dui Ying module reference first module and second module and each dispatching desk take E1 circuit time slot table with it, repeat no more here.
Effect of the present invention is, replaces twisted-pair feeder connection 2B+D dispatching desk and transmits the 2B+D signal by the E1 circuit, makes the coverage of signal transmission increase; Simultaneously,, therefore connect 2-10 dispatching desk, made full use of the bandwidth of E1 circuit, also realized the long range signals transmission of many dispatching desks with an E1 circuit because the E1 line bandwidth is higher than the 2B+D channel.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (4)
1. the module by E1 circuit connection 2B+D dispatching desk is characterized in that described module comprises 2B+D interface, 2B+D and E1 converting unit and E1 interface; Wherein, the 2B+D interface is connected with the E1 converting unit with 2B+D, is used for being connected with twisted-pair feeder transmission 2B+D signal; 2B+D links to each other with the E1 interface with the E1 converting unit, is used for the 2B+D conversion of signals is become the E1 signal, perhaps the E1 conversion of signals is become the 2B+D signal; The E1 interface is used for being connected with the E1 circuit, transmission E1 signal.
2. a kind of module by E1 circuit connection 2B+D dispatching desk according to claim 1 is characterized in that described module also comprises time-division switching chip and E1 forwarding interface; Wherein, the time-division switching chip is connected with the E1 forwarding interface with the E1 interface respectively, is used for the E1 signal of the default time slot of transmission between E1 interface and E1 forwarding interface; The E1 forwarding interface is used for being connected with the E1 circuit.
3. a method that connects the module of 2B+D dispatching desk by E1 circuit connection 2B+D dispatching desk by the E1 circuit as claimed in claim 1 is characterized in that described method comprises the following steps:
Step 1: choose 2 modules, be decided to be first module and second module respectively by E1 circuit connection 2B+D dispatching desk;
Step 2: the 2B+D interface of first module is connected with the network side management channel by twisted-pair feeder, and the E1 interface of first module is connected with an E1 transmission equipment by the E1 circuit;
Step 3: the 2B+D interface of second module is connected with dispatching desk by twisted-pair feeder, and the E1 interface of second module is connected with the 2nd E1 transmission equipment by the E1 circuit; The one E1 transmission equipment connects the transmission that the 2nd E1 transmission equipment is used to realize the E1 circuit;
Step 4: the 2B+D of first module becomes the E1 signal with the E1 converting unit with the 2B+D conversion of signals that the network side management channel transmits, and by the transmission of E1 circuit; Be specially, select 3 non-0 time slots of E1 circuit arbitrarily, and the signal of 2 B channels and the signal of 1 D channel are transmitted along the E1 circuit by 3 selected time slots respectively;
Step 5: the 2B+D of second module becomes the 2B+D signal with the E1 converting unit with the E1 conversion of signals that the E1 circuit transmits, and is transferred to dispatching desk by twisted-pair feeder;
Step 6: dispatching desk receives the 2B+D signal, handles.
4. a method that connects the module of 2B+D dispatching desk by 2-10 dispatching desk of E1 circuit connection by the E1 circuit as claimed in claim 1 is characterized in that described method comprises the following steps:
Step 1: choose the module number that connects the 2B+D dispatching desk by the E1 circuit according to the quantity of dispatching desk, corresponding 1 module that connects the 2B+D dispatching desk by the E1 circuit of each dispatching desk;
Step 2: dispatching desk is named, difference called after first dispatching desk, second dispatching desk, and according to dispatching desk quantity and the like;
Step 3: to the module name that the E1 circuit connects the 2B+D dispatching desk of passing through of each dispatching desk correspondence, module called after first module of passing through E1 circuit connection 2B+D dispatching desk of the first dispatching desk correspondence, module called after second module of passing through E1 circuit connection 2B+D dispatching desk of the second dispatching desk correspondence, and the like;
Step 4: the E1 circuit is linked to each other with the E1 interface of first module, and the 2B+D interface of first module links to each other with first dispatching desk by twisted-pair feeder, and the E1 forwarding interface of first module links to each other with the E1 interface of second module;
Step 5: since second module, the 2B+D interface of each module links to each other with corresponding with it dispatching desk by twisted-pair feeder, and the E1 forwarding interface of each module links to each other with the E1 interface of next module by the E1 circuit;
The time slot 1,2 and 3 of step 6:E1 circuit is respectively applied for the 2B+D signal of transmission first dispatching desk, and time slot 4,5 and 6 is respectively applied for the 2B+D signal of transmission second dispatching desk, and the like, finish until the time slot allocation of E1 circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2009100844451A CN101557544B (en) | 2009-05-18 | 2009-05-18 | Module connecting 2B+D scheduling desks by E1 line and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100844451A CN101557544B (en) | 2009-05-18 | 2009-05-18 | Module connecting 2B+D scheduling desks by E1 line and method |
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| CN101557544A true CN101557544A (en) | 2009-10-14 |
| CN101557544B CN101557544B (en) | 2012-04-18 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102055631A (en) * | 2010-12-30 | 2011-05-11 | 北京佳讯飞鸿电气股份有限公司 | Remote dispatching desk access method based on PCM (pulse code modulation) |
| CN109936783A (en) * | 2019-05-20 | 2019-06-25 | 南京丰泰通信技术股份有限公司 | A kind of PCM multiplex equipment and its communication means |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1039615C (en) * | 1995-06-13 | 1998-08-26 | 深圳市华为技术有限公司 | Digital micro-honeycomb service control exchange |
| CN2591904Y (en) * | 2002-11-21 | 2003-12-10 | 上海欣泰通信技术有限公司 | PHS base station line extension equipment |
| CN2588712Y (en) * | 2002-11-28 | 2003-11-26 | 上海欣泰通信技术有限公司 | PHS base station circuit multiplying equipment |
| CN2645380Y (en) * | 2003-09-19 | 2004-09-29 | 上海欣泰通信技术有限公司 | Base station transmission measuring set |
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2009
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102055631A (en) * | 2010-12-30 | 2011-05-11 | 北京佳讯飞鸿电气股份有限公司 | Remote dispatching desk access method based on PCM (pulse code modulation) |
| CN109936783A (en) * | 2019-05-20 | 2019-06-25 | 南京丰泰通信技术股份有限公司 | A kind of PCM multiplex equipment and its communication means |
| CN109936783B (en) * | 2019-05-20 | 2019-09-03 | 南京丰泰通信技术股份有限公司 | A kind of PCM multiplex equipment and its communication means |
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| CN101557544B (en) | 2012-04-18 |
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