CN201274194Y - Indoor shielding symmetrical cable - Google Patents
Indoor shielding symmetrical cable Download PDFInfo
- Publication number
- CN201274194Y CN201274194Y CNU2008201375620U CN200820137562U CN201274194Y CN 201274194 Y CN201274194 Y CN 201274194Y CN U2008201375620 U CNU2008201375620 U CN U2008201375620U CN 200820137562 U CN200820137562 U CN 200820137562U CN 201274194 Y CN201274194 Y CN 201274194Y
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- indoor
- pitch
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Abstract
The utility model relates to an indoor shielding symmetrical cable which comprises a protective cover layer, and a first wire pair, a second wire pair, a third wire pair and a fourth wire pair which are symmetrically arranged in the protective cover layer; each wire pair comprises a pair of lead wires which are twisted together. The broad-band communication cable is designed according to the structures of indoor cables, so that the pitch of four wire pairs is different; compared with the prior art, the activation frequency in the duplex state is up to 100MHz; the frequency spectrum is wide; the maximum near-end crosstalk attenuation of the broad-band communication cable between 1MHz and 100MHz is 65.3dB/100m; the maximum far-end crosstalk attenuation is 64.0dB/100m; the crosstalk interference is quite small, and the communication quality is improved; therefore, the indoor shielding symmetrical cable is in particular applicable in indoor wiring.
Description
Technical field
The utility model relates to a kind of indoor shielding symmetrical cable.
Background technology
Along with the arrival of information age, the conveying capacity of information becomes explosive growth, and as the effective means of big capacity, long Distance Transmission, cable and optical cable have obtained a large amount of application.Traditional telecommunication cable mainly is made of cable core and oversheath, and cable core comprises that the stranded line of four two two-phases is right.
In the prior art, the right pitch of these four lines is normally identical.The frequency spectrum of this telecommunication cable is generally narrower, and message capacity is limited, and can produce the cross-talk phenomenon.Cross-talk is meant signal by a cable element to the influence of signal in another cable element, cross-talk be meant betide the line that is wrapped in a Shu Qunzhong to interference, it is the main source of noise in the cable.
Summary of the invention
In order to overcome the deficiencies in the prior art, the purpose of this utility model provides the little indoor shielding symmetrical cable of a kind of cross-talk.
For solving above technical problem, the technical scheme that the utility model is taked is: a kind of indoor shielding symmetrical cable, it is right that it comprises restrictive coating and is arranged on the first interior line of described restrictive coating symmetrically, second line is right, is three-way right, the 4th line is right, described every group of line is to comprising a pair of mutually stranded lead, the right pitch of described first line is 15.6 millimeters～16.0 millimeters, the right pitch of described second line is 10.7 millimeters～11.1 millimeters, described three-way right pitch is 19.2 millimeters～19.6 millimeters, and the right pitch of described the 4th line is 12.3 millimeters～12.7 millimeters.The right pitch of line in the technical scheme is meant the single cord in the two mutually stranded strands stranded when circle distance in the cable length direction.
In a kind of technical scheme of optimization, described restrictive coating is by comprising pvc sheath layer, aluminium foil layer, PETG belting layer in outer the reaching.
Described lead is made up of conductor and the insulating barrier that is coated on the conductor periphery.
In the technical scheme that another kind is optimized, also be provided with the rope of tearing on the described restrictive coating along the cable axial distribution.
In the technical scheme that another kind is optimized, also be provided with along the ground wire of cable axial distribution on the described restrictive coating.
Because the enforcement of above technical scheme, the utility model compared with prior art has following advantage:
Though because indoor shielding symmetrical cable relatively structure be symmetrical cable, its space magnetic field distributes both inhomogeneous also asymmetric, so will offset interference between them by rational pitch design.Structure at house cable in the utility model needs design, make four right pitches of line have nothing in common with each other, compared with prior art, open frequency and can reach 100MHz when the diplex operation state, characteristic impedance is 100 ohm, and the maximum of near-end crosstalk attenuation between 1～100MHz is 65.3dB/100m, the maximum of far-end crosstalk attentuation is 64.0dB/100m, cross-talk is less, has improved communication quality, is specially adapted to house wiring.
Description of drawings
Accompanying drawing 1 is a cross section view of the present utility model;
Accompanying drawing 2 is that stranded line in the utility model is to schematic diagram;
Wherein:
1, restrictive coating; 11, pvc sheath layer; 12, aluminium foil layer; 13, PETG belting layer; 21, first line is right; 22, second line is right; 23, is three-way right; 24, the 4th line is right; 3, lead; 31, conductor; 32, insulating barrier; 4, tear rope; 5, ground wire.
Embodiment
Below in conjunction with accompanying drawing the utility model preferred embodiment is elaborated:
A kind of indoor shielding symmetrical cable as shown in Figures 1 and 2, it comprise restrictive coating 1 and be arranged on symmetrically in the described restrictive coating 1 first line to 21, second line to 22, the three-way to the 23, the 4th line to 24.
In the present embodiment, first line is mutually stranded white orchid lead and blue lead to 21, and the pitch of white orchid and blue lead is got 15.8 millimeters between 15.6 millimeters～16.0 millimeters.Second line is mutually stranded white tangerine and tangerine lead to 22, and the pitch of white tangerine and tangerine lead is got 10.9 millimeters between 10.7 millimeters～11.1 millimeters.The three-way to 23 being mutually stranded white green and green lead, and the pitch of white green and green lead is got 19.4 millimeters between 19.2 millimeters～19.6 millimeters.The 4th line is mutually stranded white palm fibre and brown lead to 24, and the pitch of white palm fibre and brown lead is got 12.5 millimeters between 12.3 millimeters～12.7 millimeters.
Though because indoor shielding symmetrical cable relatively structure be symmetrical cable, its space magnetic field distributes both inhomogeneous also asymmetric, so will offset interference between them by rational pitch design.Structure at house cable in the utility model needs design, make four right pitches of line have nothing in common with each other, compared with prior art, open frequency and can reach 100MHz when the diplex operation state, characteristic impedance is 100 ohm, the maximum of near-end crosstalk attenuation between 1～100MHz is 65.3dB/100m, the maximum of far-end crosstalk attentuation is 64.0dB/100m, and cross-talk is less, has improved communication quality, but communication of current collection words and netting twine are in communication in one, are specially adapted to house wiring.
Described restrictive coating 1 is by comprising pvc sheath layer 11, aluminium foil layer 12, PETG belting layer 13 in outer the reaching.
Described lead 3 is made up of conductor 31 and the insulating barrier 32 that is coated on conductor 31 peripheries.
Also be provided with on the described restrictive coating 1 along tearing of cable axial distribution and restrict 4, be convenient to tear the restrictive coating 1 of cable.
Also be provided with ground wire 5 on the described restrictive coating 1 along the cable axial distribution.
The foregoing description only is explanation technical conceive of the present utility model and characteristics; its purpose is to allow the personage that is familiar with this art can understand content of the present utility model and is implemented; can not limit protection range of the present utility model with this; all equivalences of being done according to the utility model spirit change or modify, and all should be encompassed in the protection range of the present utility model.
Claims (5)
1, a kind of indoor shielding symmetrical cable, it comprises restrictive coating (1) and is arranged on the first interior line of described restrictive coating (1) symmetrically to (21), second line is to (22), is three-way to (23), the 4th line is to (24), described every group of line is to (21,22,23,24) comprise a pair of mutually stranded lead (3), it is characterized in that: described first line is 15.6 millimeters～16.0 millimeters to the pitch of (21), described second line is 10.7 millimeters～11.1 millimeters to the pitch of (22), described three-way pitch to (23) is 19.2 millimeters～19.6 millimeters, and described the 4th line is 12.3 millimeters～12.7 millimeters to the pitch of (24).
2, indoor shielding symmetrical cable according to claim 1 is characterized in that: described restrictive coating (1) is by comprising pvc sheath layer (11), aluminium foil layer (12), PETG belting layer (13) in outer the reaching.
3, indoor shielding symmetrical cable according to claim 2 is characterized in that: described lead (3) is made up of conductor (31) and the insulating barrier (32) that is coated on conductor (31) periphery.
4, indoor shielding symmetrical cable according to claim 1 is characterized in that: also be provided with on the described restrictive coating (1) and tear rope (4) along the cable axial distribution.
5, indoor shielding symmetrical cable according to claim 1 is characterized in that: also be provided with the ground wire (5) along the cable axial distribution on the described restrictive coating (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201375620U CN201274194Y (en) | 2008-09-05 | 2008-09-05 | Indoor shielding symmetrical cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201375620U CN201274194Y (en) | 2008-09-05 | 2008-09-05 | Indoor shielding symmetrical cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201274194Y true CN201274194Y (en) | 2009-07-15 |
Family
ID=40884537
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201375620U Expired - Fee Related CN201274194Y (en) | 2008-09-05 | 2008-09-05 | Indoor shielding symmetrical cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201274194Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104078144A (en) * | 2014-06-19 | 2014-10-01 | 浙江中天电线电缆有限公司 | Dampproof communication cable |
| CN104078161A (en) * | 2014-06-19 | 2014-10-01 | 浙江中天电线电缆有限公司 | Communication cable |
-
2008
- 2008-09-05 CN CNU2008201375620U patent/CN201274194Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104078144A (en) * | 2014-06-19 | 2014-10-01 | 浙江中天电线电缆有限公司 | Dampproof communication cable |
| CN104078161A (en) * | 2014-06-19 | 2014-10-01 | 浙江中天电线电缆有限公司 | Communication cable |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090715 Termination date: 20110905 |