LC to LC Duplex FTTA Outdoor Patch Cable, OS2, 7.0mm LSZH

This duplex FTTA patch cable connects the baseband unit at the foot of the tower to the remote radio unit at the top, carrying two OS2 9/125µm single-mode fibers inside a 7.0mm LSZH outdoor jacket. Both ends terminate in LC UPC duplex connectors that plug directly into the SFP and SFP+ ports of common LTE, 4G and 5G radio systems. The cable core is Corning G.657.A1 bend-insensitive glass, and each leg is protected by a helical steel armored branch tube, so the assembly survives pulling, bird damage and rodents across years of outdoor exposure.

Product Highlights

• LC UPC to LC UPC duplex, OS2 9/125µm single mode
• Corning G.657.A1 bend-insensitive fiber, 20/10D bend radius
• 7.0mm LSZH outer jacket, UV stabilized and flame retardant
• Helical steel armored branch, anti-rodent and bird-proof
• Tensile strength 200/400N, crush resistance 1100/2200N
• Stock lengths 1m to 50m; project lengths on request

Modern base station architecture separates the baseband unit (BBU) in the shelter or cabinet from the remote radio unit (RRU) mounted beside the antenna. The link between them carries CPRI or eCPRI traffic over duplex single-mode fiber, and it is the most mechanically stressed jumper in the network: it hangs vertically on the tower, flexes in the wind, and is exposed to ultraviolet radiation, rain and temperature cycling every day of its service life. This cable is engineered for exactly that run, with a jacket and strength system rated for outdoor installation rather than adapted from an indoor patch cord.

The last meters of an FTTA run are the most vulnerable. Where the trunk breaks out into legs at the RRU end, standard 2.0mm tails can be crushed by clamps, chewed by rodents or pecked open by birds. Each leg of this assembly is sleeved in a helical stainless steel tube that keeps the branch flexible while adding real crush and bite resistance. The breakout point is potted and strain-relieved, so tower vibration and handling loads never reach the ferrule end-faces.

Cable routing on a monopole or lattice tower rarely allows generous sweep bends. G.657.A1 bend-insensitive fiber tolerates a 10D static and 20D dynamic bend radius, so the cable can be dressed through cable glands, tight tray entries and the crowded junction box at the tower base without adding macrobend loss. The glass remains fully compatible with legacy G.652.D single-mode plant, which keeps the link loss budget unchanged when the jumper connects into older feeder fiber.

Many FTTA runs start inside an equipment shelter, pass through a wall gland and continue outdoors up the tower. A single cable that is legal for both zones simplifies the bill of materials: the low smoke zero halogen jacket meets indoor fire expectations while its UV-stabilized, chemically resistant compound handles years of outdoor exposure. There is no transition point, no extra enclosure, and one less splice in the link budget.

Standard lengths are stocked for fast delivery: 1m (3ft), 2m (7ft), 3m (10ft), 5m (16ft), 10m (33ft), 20m (66ft), 30m (98ft) and 50m (164ft), covering the common shelter-to-tower and frame-to-radio runs this cord is built for. Custom lengths beyond this range are manufactured to order. For tower runs, measure the route from the BBU patching field to the RRU port with the cable tray path included, then add working slack at both ends; an accurately ordered length avoids a service loop hanging on the structure. Specifying the exact route length avoids both the slack storage problem of an overlong cord and the strain risk of one that is too short.

Every assembly is terminated with precision zirconia ferrule connectors and optically tested before packing: insertion loss is verified against the 0.3dB ceiling and return loss against the 50dB minimum on each leg, not on a sample basis. End-face geometry is inspected for consistent physical contact, and the cable is proof-checked so that the delivered jumper can be plugged in and put into service without on-site rework.

Refer to the LC-LC duplex FTTA family when requesting a quotation and state the route length and the breakout style required at the RRU end. For connector mixes other than LC to LC, or for non-standard breakout lengths, the customized FTTA program covers the same cable platform; send the requirement with the enquiry and the factory will confirm the manufacturable specification before production.