Large pair outdoor cables for direct burial (30, 50 and 100 pairs) — Factory prices
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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
Structural: A multipair telephone cable consists of several pairs of insulated copper wires, twisted together within a single sheath.
Features
1. Large number of pairs: Contains multiple pairs of insulated copper wires (e.g., 10, 25, 50, 100 pairs) within a single cable sheath.
2. Twisted pair construction: Each pair is twisted to minimize electromagnetic interference (crosstalk) between adjacent pairs.
3. Color-coded insulation: Pairs are identified by a standard color code (e.g., blue, orange, green, brown, slate gray) for easy identification and termination.
4. Capacitance and impedance control: Designed with a specific capacitance (typically around 52 pF/m) and characteristic impedance (100 or 120 ohms) to ensure signal integrity over distance.
5. DC loop resistance: Low resistance per unit length (e.g.,
Applications
Telecommunications backbone networks: These are used as feeder cables between telephone exchanges and distribution points, carrying hundreds of subscriber lines over medium distances.
Commercial buildings (PBX systems): They connect the main distribution frame (MDF) with the intermediate distribution frames (IDF) for the internal telephone networks of the offices.
Industrial facilities and complexes: They provide legacy analog voice or data links across factories, refineries, university campuses, and military bases where a robust copper infrastructure already exists.
Aerial or outdoor duct installations: Multipair cables with polyethylene (PE) coverings are deployed on poles or in underground ducts for neighborhood telephone service.
Railway and metro communications: They provide service to telephones located next to the tracks, emergency call points and signaling control lines by means of grouped pairs.