25-Pair Outdoor Communication Cable

How these cables are built

Multi-pair cable bundles 2 to 50 twisted pairs under one jacket. Each pair is insulated with HDPE, the pairs are laid up in layers, and the whole assembly is jacketed in PVC or HDPE indoors, or in PE with waterproof paper outdoors. The higher the pair count, the more the lay-up and the pair-to-earth capacitance balance matter, because crosstalk between pairs is what limits a riser.

The coaxial and control cables in this family are built differently on purpose: SYV is a single 75 ohm coaxial construction for video, while RVV and RVVP are flexible multi-core cables for power and control, with foil and braid added on the RVVP version.

Where this family is specified

Multi-pair cable is the backbone of voice and low-speed data risers, intercom and door-entry systems, and small campus backbones where fibre is not justified. SYV coaxial is still the standard for analogue CCTV and CATV distribution, and RVV/RVVP carries camera power and PTZ control where a flexible multi-core cable is easier to terminate than coax.

What to confirm before ordering

Confirm the pair count per riser or the cable type per camera, the indoor or outdoor condition, and the total length. For SYV, confirm the braid count; for RVV/RVVP, confirm the core count and cross-section. Labelling of reels and boxes to match the as-built documentation is quoted with the order.