Indoor telephone cable in 20, 50, 100 and 300 pairs, factory price
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product detail
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Parameters
| product name | multi-pair indoor telephone cable |
| Transmission standards | YD / T838.4-2003 |
| Jacket | PVC / LSZH |
| Driver's equipment | Bare copper |
| OD conductor | 0,4 mm / 0,5 mm / 0,6 mm |
| Armored | Aluminum tape |
| Insulation material | PHYSICAL EDUCATION |
| Jacket color | Black gray |
| Sample status | A stock |
| Core number | 200 |
| If you provide a free sample | YEAH |
| Package | Wooden or custom reel |
More information
Product Introduction
A cable containing multiple pairs of individually twisted copper wires within a single protective sheath. Each pair is electrically insulated and color-coded, and is capable of carrying an independent voice or data circuit. This is the standard cabling used to connect a telephone company's network to a building or to distribute lines within it.
Features
1. Twisted pairs: The fundamental unit is the twisted pair: two insulated copper conductors wound in a spiral. This twisting is crucial for noise and crosstalk reduction, as it helps cancel electromagnetic interference (EMI) picked up by the circuit.
2. Bundle and Sheathing: Several of these twisted pairs (e.g., 25, 50, 100, or more) are bundled together with fastening tapes and covered with a tough outer sheath, usually made of PVC (for indoor use) or PE (for outdoor or buried use). This provides mechanical protection and resistance to environmental conditions.
3. Color coding: The pairs follow a strict and standardized color code (e.g., blue/white-blue, orange/white-orange for 25-pair cables) for flawless identification, termination, and troubleshooting in distribution panels.
Applications
Service entrance: From the telecommunications network to the interior of the building.
Building trunk network: Vertical connections between floors.
Horizontal cabling: From the telecommunications rooms to the power outlets.