What happens when a remote site can’t afford to lose connectivity, even for a second?
For operators at the edge of terrestrial telecom connectivity, the network is not just IT infrastructure. It is the operational lifeline that keeps voice, video, telemetry, and safety systems running simultaneously, often across a mix of satellite and terrestrial links. When bandwidth is constrained and traffic types compete, the consequences of a misconfigured or underperforming network are measured in terms of productivity loss, safety risks, and costs.
The promise of multi-orbit connectivity and platforms like Telesat Lightspeed is compelling. But for the service providers designing and delivering those services, the real question is not what is possible. It is whether it actually works under real-world pressure.
That is exactly what Telesat and XipLink, an SD-WAN and optimization solutions provider, set out to validate.
A test that reflects reality
Working with the Telesat Lightspeed Network Emulator, XipLink’s objective was straightforward, but the stakes were not. Could multiple satellite links behave like a single, reliable, high-performance connection in real-world conditions, or would performance degrade under load, congestion or failure scenarios?
The test environment simulated a remote deployment with four user terminals, each representing a distinct remote, connected to an SD-WAN appliance operating in Layer 2 mode. Traffic was generated using an EXFO traffic generator configured to replicate the kinds of applications that matter most in demanding environments: VoIP, video streaming, and bulk data transfers, each assigned appropriate quality-of-service parameters.
Fibre-like results
The first results were clean and compelling.
With all four links active, the terminals delivered a combined 292 Mbps of forward throughput with zero packet loss. At the same time, average latency remained approximately 51 milliseconds, firmly within the range of terrestrial-like performance. Traffic was distributed evenly across all links at the committed information rate (CIR), demonstrating that the system was not simply aggregating bandwidth. It was using it efficiently.
From the end user’s perspective, the complexity disappears. What remains is a single high-throughput connection that behaves as expected.
Automatic failover when a link goes down
Another important insight came when things started to break, because this is where most networks struggle.
When one of the four links was taken offline, traffic was automatically rebalanced across the remaining three links. The transition was immediate and, critically, invisible to the end user. There was no interruption, no degradation, and no manual intervention required.
When that link was restored, the system detected its return and redistributed traffic across all four terminals instantaneously, again with no disruption to aggregated throughput at the point of presence.
Even in a two-link failure scenario, where congestion began to build on the remaining connections, prioritized traffic was protected. The system did not attempt to treat all traffic equally. Instead, it ensured that mission-critical applications continued to perform, even under constrained conditions.
Layer 2 – clean handoffs and maximum flexibility
Beyond performance, one of the most important outcomes of this validation is the simplicity it enables for service providers.
The SD-WAN solution was validated in Layer 2 mode, aligning directly with how Telesat Lightspeed delivers Carrier Ethernet services. Telesat Lightspeed adheres to Mplify/MEF 3.0, the globally adopted telecom standard for enterprise-grade networking. This allows us to provide a virtual fibre network that can be delivered to any point on the globe.
For integration, a Layer 2 interface means a clean handoff. There is no Layer 3 routing or IP address management imposed. Service providers retain full control over how those layers are designed and managed within their own networks. For operators building services on top of a wholesale connectivity layer, that separation reduces complexity and simplifies integration.
How it works in practice: an offshore company running private 5G
Consider an oil and gas operator running a private 5G network at a remote extraction site. The connectivity demands at that site span an enormous range. Operational telemetry, safety monitoring, and real-time control systems require the lowest possible latency while meeting stringent service-level agreements (SLAs). Crew morale, welfare, and recreation traffic, including streaming, social media, and personal communications, is vital to the people on site, but does not carry the same urgency or performance requirements.
With validated SD-WAN link aggregation over Telesat Lightspeed, a service provider can design exactly that kind of differentiated service. Mission-critical traffic is assigned to the highest-priority tier and guaranteed its lane, regardless of what else is happening on the network. Recreational traffic moves over a separate channel without competing for the highest level piece of the pipe. The system makes those routing decisions automatically, in real time, based on application type, latency, and link conditions. No manual intervention is required.
This is application-aware routing and dynamic path selection working as designed, proven in the lab before it reaches the field.
A natural evolution
What makes this validation particularly significant is that it extends beyond today’s networks.
The XipLink architecture validated here was built on GEO satellite links, because that is where most service providers operate today. But the lab results extend well beyond the current moment.
As Telesat Lightspeed comes online, service providers will have the opportunity to augment existing GEO deployments with LEO capacity or support LEO-to-LEO configurations as the technology matures. The same SD-WAN framework, the same aggregation logic, intelligent delivery and failover behavior carry forward through each stage of that evolution.
Telesat enables its service provider partners to offer multi-orbit connectivity to their customers, combining GEO capabilities with low-latency LEO performance across whatever mix of links a given deployment requires. Telesat provides the high-performance, SLA-backed wholesale layer as it has always done. The service provider designs and delivers the offering.
The question at the start of this validation was whether multi-network, multi-link connectivity could perform as promised under pressure. The results show that it can.
See it for yourself
As you explore multi-orbit services and/or are evaluating how link aggregation could fit into your network architecture, the best way to understand the impact is to experience it directly. Explore what is possible with the Telesat Lightspeed Network Emulator.
