The last mile is the final segment of a telecom network: the connection that runs from a provider’s network to a customer’s building. It may be fiber, coaxial cable, copper telephone wire, fixed wireless, cellular or satellite. Despite the name, it can be a few hundred feet or many miles long. It is often called the local loop, a term from the telephone era. For most business sites, the last mile is the part of a connection that most affects what services are available, how much they cost and how long they take to install.
At a glance
- The last mile is the access link from the provider’s nearest network point to your building, not the provider’s backbone.
- It is often the most expensive and slowest part of a network to build, because each building needs its own connection.
- Whether a provider’s network already reaches the building (on-net) drives price and lead time.
- A provider may own the last mile or lease it from another carrier, which affects who fixes faults.
- It is a common shared point of failure, so true redundancy depends on separate last-mile paths.
What problem it solves
Backbone networks connect cities and data centers with high-capacity fiber, but each business site still needs a connection from that network to its own front door. The last mile is that connection. Without it, no amount of backbone capacity reaches the site.
For buyers, understanding the last mile explains several common frustrations: why only one or two providers can serve a building, why installation can take months, why two “different” connections fail together, and why a circuit’s repair can bounce between companies. Asking the right last-mile questions early avoids surprises when opening a site or designing a backup.
How it works
Technologies. Common last-mile media include fiber, which offers the most capacity and is typical for dedicated internet access and other dedicated services; cable (coaxial) and copper DSL, which deliver most broadband; and fixed wireless, cellular and satellite, which avoid trenching and are often used where wired options are limited or as a diverse backup.
On-net, near-net and off-net. If a provider’s network already reaches the building, service can usually be installed relatively quickly. If it is nearby, the provider may build a lateral, which involves construction and permits. If it is not, the provider may lease access from another carrier through a carrier interconnection and deliver its service over that circuit.
Entering the building. The last mile ends where the provider’s cable enters the building, at the minimum point of entry (MPOE) or demarcation point. Getting from there to your suite is inside wiring, which may be the landlord’s or the tenant’s responsibility.
Shared risk. Multiple providers may share the same conduit in the street, the same poles or the same building entrance. If one backhoe or pole failure cuts them all, redundancy on paper does not help.
Our dedicated internet access page covers how to compare on-net and off-net last-mile options for business circuits.
When it matters for buyers
- Choosing an office. Check which providers have fiber in the building, and the lead time for others, before signing a lease.
- Designing redundancy. Ask how each connection enters the building and whether any section of the path is shared.
- Comparing quotes. Off-net or newly built last-mile access often carries construction charges, longer terms or higher monthly prices.
- Troubleshooting. When an ISP resells another carrier’s last mile, repairs involve both companies.
- Rural or new-build sites. Limited last-mile options may make fixed wireless or cellular the practical primary or backup.
Questions to ask vendors
- Is our address on-net, near-net or off-net for you?
- If off-net, which carrier provides the last mile, and who owns troubleshooting end to end?
- What construction is required, who pays for it, and what is the realistic lead time?
- What technology delivers the last mile, and what route does it take into the building?
- Does this path share any conduit, poles or building entrance with our other connection?
- Where is the demarcation point, and who is responsible for wiring from there to our suite?
How it differs from the minimum point of entry (MPOE)
The last mile is the provider’s connection from its network to your building. The minimum point of entry (MPOE) is where that connection crosses into the building, typically the first point at which the provider’s cable meets building wiring. The last mile ends at or near the MPOE; the wiring from the MPOE to your suite is a separate responsibility, often handled by the landlord or by the tenant’s own cabling contractor. Many installation delays happen in that gap, after the last mile is built but before the circuit reaches your equipment.