Tactical fibre optic cable is a deployable cable with tight-buffered fibres, aramid yarn strength members and a tough outer jacket, usually polyurethane. It is designed to be laid on the ground, recovered onto reels and redeployed many times. It is used for temporary links in defence, outside broadcast and live events, typically fitted with expanded beam or ruggedised connectors.
How tactical fibre optic cable is built
Outdoor telecom cable protects fibre with gel-filled loose tubes and armour, then stays in the ground for decades. Tactical cable is designed for the opposite life: hundreds of deployments, each with bending, dragging and rewinding. Every layer is chosen for flexibility and crush resistance rather than long-term burial.
| Layer | Typical material | Purpose |
|---|---|---|
| Fibre | Single-mode or multimode, often bend-insensitive | Carries the signal |
| Tight buffer | Thermoplastic coating, commonly 900 µm, over the 250 µm coated fibre | Protects each fibre and allows direct connector termination with no gel |
| Subunit jacket (breakout designs) | Individual jacket around each buffered fibre and its own aramid | Lets each fibre be broken out and terminated as a separate leg |
| Strength members | Aramid yarn | Takes pulling load so the fibre is not stretched, and spreads crush forces |
| Outer jacket | Polyurethane; LSZH or other compounds where fire performance matters | Resists abrasion, cuts, oils and water, and stays flexible in cold weather |
| Optional armour | Light stainless steel spiral tube | Extra crush and bite resistance where vehicles or animals are a risk |
Fibre counts are usually low, often 2, 4, 6 or 12, because tactical links carry a few high-bandwidth channels between pieces of equipment. Radix makes tactical HMA fibre optic cable and 6-fibre armoured tactical cable with LC, FC, SC or ST connectors.
Jacket materials
Polyurethane is the usual tactical jacket. It resists abrasion and cutting far better than PVC, tolerates oils and fuels, and stays flexible at low temperatures where PVC stiffens. Hydrolysis-resistant and microbe-resistant grades are used where cables lie on wet ground for long periods.
LSZH jackets are specified where cable runs inside ships, vehicles, shelters or buildings and smoke and acid gas in a fire are the main concern. They usually give up some abrasion resistance compared with polyurethane, so the choice depends on where the cable spends most of its life. Jacket colour is a practical choice too: olive or black for defence, black or high-visibility colours for events where people need to see the cable.
Crush, impact and flex
Tactical cable is judged by mechanical performance. Most datasheets quote results from the IEC 60794-1-21 test methods for tensile load, crush, impact, repeated bending, torsion and flexing. Ask for the values and the test method for the exact construction quoted, and compare like with like.
- Crush: foot traffic, vehicle wheels and equipment set down on the cable. Use cable protectors or ramps at road and walkway crossings rather than relying on the jacket alone.
- Impact: dropped equipment, and reels dropped from vehicles.
- Repeated bending and flexing: every deployment and recovery bends the cable over the reel and at equipment.
- Tensile: pulling the cable through gaps, and short suspended spans between structures.
- Temperature: separate operating and storage ranges, and the lowest temperature at which the cable can still be flexed.
Bend radius matters more on a deployable cable than an installed one. The dynamic bend radius (while moving or under load) is larger than the static bend radius. A common rule of thumb is 20 times the cable diameter dynamic and 10 times static, but the datasheet figure takes priority.
Reels, drums and deployment
Tactical cable is stored and deployed on reels. Man-portable reels with carrying frames suit short lengths moved on foot; larger drums mount on vehicles or stands. Many reels terminate the inner end on a connector at the hub, so the reel can be connected and used without unwinding all the cable. Radix supplies tactical cable reels fitted with cable and connectors as one assembly.
Length per reel is a balance between weight and how many joins a link needs. Standardising on one or two lengths that chain together keeps spares simple. Good deployment practice:
- Pay out from a rotating reel. Pulling loops off a fixed drum twists the cable.
- Keep connector caps on until the moment of mating, and put them back immediately after.
- Avoid sharp edges, doors and hatches, and protect crossings.
- Secure the cable near each equipment end so the connector does not carry the load.
- Recover under light, even tension, and wipe the jacket as it winds on.
- Inspect the jacket for cuts and the connectors for damage before the next deployment.
Connectors for deployable links
The connector usually decides how a tactical system copes with dirt. Common choices:
- Expanded beam connectors, often hermaphroditic, for the most dirt-tolerant field use. Our expanded beam connector guide explains the trade-off with insertion loss.
- MIL-style circular connectors with physical contact termini, where loss must be low and crews can clean properly.
- Ruggedised LC, SC, ST or FC connectors with strain relief boots, at equipment ends inside shelters and racks.
- opticalCON connectors for broadcast and live event systems already built around them.
Where tactical cable is used
- Defence: links between command posts, shelters, radar and communications equipment. Fibre does not conduct electricity, so it adds no ground loops between sites and is immune to electromagnetic interference.
- Outside broadcast: video, audio and data links across stadiums, racecourses and remote locations, alongside SMPTE hybrid camera cable.
- Live events and touring: stage to front-of-house and between stages, replacing heavy copper multicores.
- Temporary and emergency networks: mining, exploration, construction sites and disaster recovery.
What to specify
- Fibre type and count, for example 4 fibres OS2 single-mode.
- Cable diameter, jacket material and colour.
- Mechanical ratings required: crush, impact, tensile and repeated bending, with test methods.
- Length per assembly and per reel, and reel type.
- Connector at each end, gender if not hermaphroditic, and caps with lanyards.
- Labelling and test report, including insertion loss per fibre.
Send the details through the quote form and ask for the datasheet values that apply to the exact build.
Questions buyers ask
What is the difference between tactical cable and armoured cable?
Armoured cable uses steel tape, interlocking armour or steel wire for protection and is designed to be installed once. Tactical cable relies on aramid yarn and a tough polyurethane jacket so it can flex and be reeled repeatedly. Some tactical cables add a light steel spiral for extra crush resistance.
Can tactical fibre cable be buried permanently?
It is not designed for it. Long-term burial calls for outdoor cable with water blocking and, usually, armour. Tactical cable can lie on the ground or in shallow temporary trenches for the length of a deployment.
Should a tactical link use single-mode or multimode fibre?
Single-mode is the usual choice for links of more than a few hundred metres or several chained reels, because its loss over distance is low. Multimode suits short links where the equipment already has multimode optics. Match the fibre to the equipment at both ends.
How many times can tactical cable be deployed?
It depends on construction, handling and conditions. Datasheet results for repeated bending and flexing tests indicate how the cable copes with cycling. In practice, inspect the jacket and connectors after each recovery and retire damaged lengths.
Can vehicles drive over tactical fibre cable?
A tactical cable with a good crush rating will often survive occasional crossings, but repeated traffic will damage it. Use cable protectors or ramps at crossings, and consider a construction with a steel spiral where crossings cannot be avoided.
What reel length should I choose?
Choose the longest length a crew can carry and handle safely, then standardise so reels chain together for longer runs. Fewer joins mean less connector loss, but heavier reels are harder to deploy on foot.