You Built Fiber. What Happens to Your Microwave Network?

Fiber changes the role of microwave. It does not automatically eliminate it.

For many electric utilities, fiber has become a foundational investment in communications modernization. It offers high capacity transport for substations, control environments and other critical infrastructure, and it can support the growing volume of data associated with increasingly connected grid operations.

Once that investment is in place, another question often follows: what should we do with the microwave network we already own?

It is tempting to treat this as a simple technology transition. Fiber is newer and has more capacity, so microwave must be redundant. But that view overlooks one of the most important considerations in utility communications planning: the value of a network is determined by the role it plays in the overall architecture, not simply by whether another network has been deployed.

Future Technologies' Operational Connectivity Architecture reflects this principle. Modern utility connectivity is not built around one network. Fiber, microwave, fixed wireless, public and private cellular, satellite, SCADA communications and other technologies can serve different operational roles within the same environment.

Modernizing one network does not modernize the entire architecture

Utilities have accumulated communications assets over decades. Some networks were built for SCADA. Others were introduced for AMI, field operations, substations or grid modernization programs. Fiber may have been added later to increase capacity or create a more robust transport backbone.

Each project can be successful on its own while still leaving a broader architectural question unanswered: how should these networks work together? That question matters most when it comes to microwave.

A microwave route that is physically and geographically independent from a fiber path may offer significant value as a secondary or backup communications route. If construction damages the fiber path, a storm affects a corridor or other physical infrastructure fails, a separate microwave route can help maintain communications to critical locations.

In that case, microwave is no longer simply an older primary network waiting to be retired. Its role has evolved into part of the utility's resilience strategy.

Resilience requires more than another connection

This distinction matters because redundancy and resilience are not the same thing. Two fiber connections may look redundant on a network diagram, but they may share conduit, poles, power, facilities or geographic exposure. A single physical incident could affect both. A microwave route can create a genuinely different failure domain.

That does not mean microwave should automatically be maintained everywhere. It means the decision should be based on what each link contributes to operational continuity. Utilities should ask:

• Which substations or operating locations require diverse communications paths?
• Where does microwave provide true geographic diversity, not just a second line on a diagram?
• Is the existing equipment capable of supporting current and expected traffic requirements?
• What infrastructure would need to be modernized to extend its useful life?
• Where is the network creating cost without providing meaningful operational value?

The answers will be different across a service territory, and that is expected.

Think in terms of retain, modernize, repurpose or retire

A practical microwave strategy does not start with a blanket decision to keep or remove the network. It starts with an asset-by-asset and route-by-route evaluation.

Some microwave links remain well suited for their current role and should be retained. Others provide important geographic diversity but need equipment, capacity or infrastructure modernization. Certain routes can be repurposed from primary transport to resilient backup. And some no longer provide enough operational value to justify continued investment.

This approach protects valuable existing infrastructure while avoiding the opposite problem, which is maintaining legacy assets simply because they already exist. It is consistent with Future Technologies' broader philosophy of preserving fit-for-purpose infrastructure while introducing new connectivity layers where operational requirements justify them.

The bigger question is not fiber versus microwave

As grid operations become more distributed and dependent on communications, utilities need networks capable of supporting outage response, field safety, automation, grid-edge visibility and long-term resilience.

That creates a broader planning question: what role should each communications asset play in the architecture we need going forward? For microwave, the answer may be very different today than it was when the network was first built. But different does not mean obsolete. It means the network deserves to be evaluated based on the operational value it can provide next.

Where to start

Future Technologies helps electric utilities assess existing communications environments and determine what to retain, modernize, integrate or replace as part of a broader Operational Connectivity Architecture.

If your utility has invested in fiber and is deciding what comes next for microwave, start by evaluating the two networks together, not independently. Schedule a conversation with a Future Technologies utility expert to identify where connectivity is limiting grid modernization and define a practical path forward.