The short version
Businesses regularly need to connect two locations that are close together but separated by something inconvenient — a road, a car park, a neighbouring title, a heritage frontage or simply a concrete slab nobody wants to cut.
Trenching fibre is the reliable answer and often the expensive one. The civil works, reinstatement, permits and traffic management can dwarf the networking cost. A point-to-point wireless link puts a directional antenna at each end and bridges the two networks through the air instead.
| Point-to-point wireless | Trenched fibre | |
|---|---|---|
| Typical cost driver | Hardware and mounting | Civil works and reinstatement |
| Install time | Days | Weeks, subject to permits |
| Needs line of sight | Yes | No |
| Affected by weather | Minimally, when well designed | No |
| Crosses third-party land | Usually not an issue | Often requires agreement |
| Best fit | Adjacent buildings, yards, sheds | Permanent, high-capacity, no line of sight |
Line of sight is the whole game
This is the single factor that determines whether a link works, and it is routinely underestimated.
Line of sight means the two antennas can genuinely see each other, with clearance around the direct path — not just that you can spot the other building from the roof. Obstructions matter even when they appear to be at the edge of the path.
Common problems found on site:
- Trees. The worst obstruction, because they grow, and because wet foliage attenuates far more than dry. A link commissioned in summer through a gap in a canopy may fail in winter.
- Growth over time. Something clear today may not be in three years.
- Building works. A new structure between two sites can end a link that has run for years.
- Parked vehicles. Trucks and containers in a yard can sit directly in a low-mounted path.
- Glass. Links through windows generally disappoint.
If line of sight cannot be established reliably, that is the answer. Fibre is the right choice, and a wireless link installed against the evidence becomes a recurring support problem.
Mounting is the second most common failure
Antennas are directional. The narrower the beam, the more precisely they must stay pointed. A mount that flexes in wind will produce a link that degrades in poor weather and recovers afterwards, which is a frustrating fault to chase because it is intermittent and weather-dependent.
Good practice is a rigid mount fixed to structure rather than to cladding or a light pole, allowance for adjustment during alignment, and access for maintenance without scaffolding wherever possible.
Alignment matters as much as mounting. Both ends need aiming properly, and the equipment reports signal quality during the process. A link that “works” at poor signal levels has no margin left for rain, growth or drift.
Outdoor cabling and surge protection
This is where otherwise good installations fail after eighteen months.
Outdoor runs need cable rated for the environment, correctly sealed terminations, and UV resistance. Indoor cable in an outdoor path will degrade.
Surge protection matters, particularly for equipment on a roof or mast. A link between two buildings creates an electrical path between them, and lightning does not need a direct strike to damage equipment. Surge protection at both ends and proper earthing should be part of the design, not an optional extra.
Fixed cabling work falls under the ACMA cabling provider rules, and outdoor runs into a building are no exception.
What to expect in practice
A well-planned short link between adjacent buildings behaves like a cable for everyday purposes. Staff at the second building use the same network, the same phone system and the same file access.
Two realistic expectations are worth setting. First, capacity is shared across the link, so it should be sized for the traffic that genuinely needs to cross it, not for the total activity at both sites. Second, a wireless link has more variables than a cable and deserves monitoring, so a degrading link is noticed before it fails.
For a second site that only needs internet access rather than access to the main network, a separate internet service may be simpler than a bridge. The bridge earns its place when the two sites need to behave as one network — shared servers, shared phone system, cameras recording back to a single console.
Where this fits for regional and industrial sites
The pattern is common in situations where trenching is disproportionate:
- A warehouse or workshop behind an office, separated by a yard
- A second tenancy across a car park or laneway
- Farm and rural properties with sheds well away from the house or office
- Sites where the cable path would cross land the business does not control
- Temporary or leased premises where permanent civil works cannot be justified
It is also useful as a resilience option. A link between two sites with separate internet services can provide a backup path if one connection fails, which is covered in business internet failover and redundancy.
Questions worth answering before ordering hardware
- Can you stand at both mounting points and see the other? If not, survey properly before committing.
- What is in the path, and what will be there in five years? Trees and development plans both matter.
- What structure is available to mount to? Rigid fixing beats convenient fixing.
- What actually needs to cross the link? Sizing follows the traffic, not the site.
- Is there power and a cable path at both ends? Including a route indoors that can be sealed properly.
- Who monitors it? A link nobody watches degrades quietly.
Helpful starting points
If the two buildings need to operate as one network, start with Ubiquiti network services, which covers the link and the networks at both ends. If line of sight is doubtful, data and fibre cabling covers the trenched alternative. For sites spread across regional Victoria, the same approach applies, and connectivity options are compared in NBN business fibre vs Enterprise Ethernet vs 5G.