DIA gives your business a private, symmetric internet circuit that isn't shared with anyone else. It's more expensive than shared broadband — but for some businesses, it's non-negotiable.
Dedicated Internet Access (DIA) is a type of business internet circuit in which your bandwidth is reserved exclusively for your organization — it's not shared with neighboring businesses or tenants. The bandwidth you pay for is the bandwidth you get, 24 hours a day, regardless of what others in your building are doing.
This is distinct from most broadband and even most business cable connections, which use shared network architectures. With shared infrastructure, speeds are advertised as "up to" a maximum — because during peak hours, you're competing for capacity.
| | DIA | Shared Broadband | |
| Bandwidth | Guaranteed, symmetric | Variable, asymmetric |
| Contention ratio | 1:1 (dedicated) | 20:1 to 100:1 typical |
| Upload speed | Equal to download | 10–30% of download |
| SLA uptime | 99.99% typical | 99.5–99.9% |
| MTTR | 4-hour response typical | 24–48 hours |
| Cost | $300–$2,000+/month | $80–$500/month |
| Install time | 30–90 days | 1–2 weeks |
| Best for | Mission-critical operations | Standard offices |
Most broadband connections are asymmetric — downloads are fast, uploads are slow. This made sense in the era of web browsing and email, where you mostly received data. Modern business applications are bidirectional:
For businesses running these workloads at scale, asymmetric broadband creates bottlenecks that symmetric DIA eliminates.
DIA is delivered over several physical technologies:
Fiber DIA (most common): A dedicated fiber strand to your building, connected to the carrier's backbone. Offers the highest speeds (100 Mbps to 100 Gbps), lowest latency, and strongest SLAs. Requires the carrier to have fiber present in or near your building.
Ethernet over Copper (EoC): DIA delivered over copper telephone lines using bonded VDSL technology. Speeds are lower (10–100 Mbps typical) but available in buildings where fiber isn't present. Cheaper than fiber DIA.
Fixed Wireless DIA: Point-to-point wireless link to a carrier tower or rooftop antenna. Fast installation (days, not months). Good for temporary locations or where fiber isn't available.
4G/5G DIA: Dedicated cellular-based internet with guaranteed throughput. Improving rapidly with 5G rollouts, but still more expensive per Mbps than fiber.
High-stakes, real-time applications. VoIP, video conferencing, and real-time financial data all degrade badly under packet loss or jitter. DIA's consistent performance and SLA-backed quality is the right infrastructure for these workloads.
On-premise servers serving remote users. If employees or customers connect to systems hosted in your building, your upload bandwidth is their download bandwidth. Asymmetric broadband throttles this.
Compliance and audit requirements. Certain regulated industries (financial services, healthcare, government) have infrastructure requirements that shared broadband doesn't meet. DIA with documented SLAs often satisfies these requirements.
High-value e-commerce or transaction processing. If your internet going down costs you $2,000/hour, the price premium for DIA is justified. Do the math.
DIA isn't necessary for every business. A 20-person professional services office using cloud SaaS applications with modest upload needs — email, document editing, video calls at normal volume — will be well served by quality business fiber broadband at a fraction of DIA cost.
The decision hinges on:
1. What applications depend on internet connectivity
2. What your real downtime cost is per hour
3. Whether you can tolerate peak-hour performance variability
DIA pricing varies dramatically by location and carrier. A 100 Mbps fiber DIA circuit might cost $400/month in a well-served urban building or $2,000/month in a suburban office park that requires a new fiber build. Getting multiple quotes is essential — carrier pricing for DIA varies by 50–100% for the same service at the same address.
A telecom broker can check availability and pricing across multiple DIA providers simultaneously, often uncovering options that direct carrier sales teams don't proactively offer.
---
Free analysis — we compare 300+ providers at your exact address.
Get a Free Quote