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Ethernet cable basics:
The Ethernet cables for connectivity in most office and home environments rely on twisted wire pairs within an overall cable – Cat 5, Cat 6 and Cat 7 all used this format. Twisting the wires together enables the currents to balance, i.e in one wire the current is moving in one direction, and int he other wire of the pair the current is going in the other, enabling the overall fields around the twisted pair to cancel.
In this way, data can be transmitted over considerable lengths without the need for undue precautions.
As several twisted pairs are contained within a particular network cable, the number of twisted per unit length is arranged to be different for each pair – the rate being based on prime numbers so that no two twists ever align. This reduces crosstalk within the cable.
The Ethernet cables are available in a variety of lengths as patch cables, or the cable itself is available for incorporating into systems, buildings, إلخ. The terminations can then be made to the required connector using a crimp tool. These network cables are available in a variety of lengths – long Ethernet cables are available, some of the longest being up to 75 metres.
Earlier network cables were unshielded, but later ones were shielded to improve the performance. For example an unshielded twisted pair (UTP) cable may be satisfactory for a short run between a computer and router, but a foil shielded cable, FTP, is best longer runs or where the cable passes through areas of high electrical noise.
1…..Bare, solid copper conductor, AWG23,AWG24
2…..core insulation SFS Polyethylen
3…..layer of plastic foil
4…..plastic laminated aluminium foil
5…..PVC-sheath or with halogen free sheath
Standards:
ISO/IEC 11801 2.Edition EN 50173-1 TIA/EIA 568-B.2 IEC 61156-5 EN 50288-5-1
Technical data:
| نطاق درجة الحرارة | moved | 0°C till +60°C | Bending rad. | under tension | 8,0 x Ø | |
| Loop impedance | [Ohm/100m] | 19 | Bending rad. | no tension | 4,0 x Ø | |
| سعة | الأعلى. | [nF/100m] | 50 | |||
| Nom. Velocity of propagation | NVP nom. | 77 | ||||
| Attenuation | 1-100 ميغاهيرتز | [Ohm] | 100+/- 22 | |||
| Coupling resistance | 1-100 ميغاهيرتز | [mOhm/m] | 10 | |||
| Capacity coupling (f=800 Hz) | K< 100 | [pF/100m] | 150 | |||
| Insualtion resistance | [GOhm/m] | >5 | ||||
| Test voltage at 50 هرتز | [الخامستكييف] | 700 |
| تكرار [ميغاهيرتز] | Line attenuation(dB/100m)Next(ديسيبل) | Next(ديسيبل) Next(ديسيبل) | ACR(ديسيبل) | Return Loss Rل(ديسيبل) | ||||
| nom.* | max.CAT 6 | nom.* | min. CAT6 | mon.* | min.CAT 6 | nom.* | min. CAT 6 | |
| 1 | 1.8 | 2.1 | 78 | 66 | 76.2 | – | 22 | 20.0 |
| 4 | 3.4 | 3.8 | 74 | 65 | 70.6 | – | 25 | 23.1 |
| 10 | 5.4 | 6.0 | 70 | 60 | 64.6 | – | 28 | 25.0 |
| 16 | 6.9 | 7.6 | 65 | 56 | 58.1 | – | 28 | 25.0 |
| 20 | 7.8 | 8.5 | 62 | 55 | 54.2 | – | 28 | 25.0 |
| 31.25 | 9.8 | 10.8 | 58 | 52 | 48.2 | – | 27 | 23.6 |
| 62.5 | 13.8 | 15.5 | 55 | 47 | 41.2 | – | 26 | 21.5 |
| 100 | 17.5 | 19.9 | 52 | 44 | 34.5 | – | 25 | 20.1 |
| 155 | 21.8 | 25.3 | 50 | 41 | 28.2 | – | 25 | 18.8 |
| 200 | 24.9 | 29.2 | 48 | 40 | 23.1 | – | 24 | 18.0 |
| 300 | 29.5 | – | 43 | – | 13.5 | – | 22 | – |
| 350 | 33.0 | – | 41 | – | 8.0 | – | 21 | – |
| * Category 6 – Values per ISO / IEC 11801, EN 50173, EN 50288-2-1 * Category 6 – Values per TIA / EIA – 568-A-5 |
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2. Cables guaranteed for one year (except wet location)
3. Respond inquiry in 12 ساعات, quotation in 24 ساعات.
4. Leading time 25-30 days in slack season and 30-40 days in peak season
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