Fiber, Carriers and Internet Redundancy in an Office Building

A team whose compute lives in the cloud depends on its office connection for almost all productive work. Buying service from two providers feels like protection, and sometimes it is. Often it is not.

Carriers frequently share physical infrastructure. Two providers may lease capacity on the same underlying fiber, enter the building through the same conduit, land in the same basement room and ride the same riser to your floor. A single excavation accident in the street, a flood in that room or damage in that riser takes both down together.

• Carrier diversity means service from two independent companies, so a billing dispute, a network outage or a failure inside one provider does not disconnect you.
• Path diversity means the two services reach you over physically separate routes: different street approaches, different building entrances, different risers.
• Equipment diversity means the two services do not converge on one piece of hardware, one power source or one closet inside your suite.

Real redundancy needs all three. Marketing sheets list carrier names. The questions below get at the routes.

When a landlord says a carrier "serves the building," that can mean several things.

• On-net or lit: the carrier already has fiber and equipment in the building and can deliver service by extending it to your suite.
• Near-net: the carrier has fiber in the street or a nearby building and would have to construct a connection into yours.
• Serviceable: the carrier is willing to quote, which says little about how or when service would arrive.

The difference shows up in cost and time. Service from an on-net carrier usually involves riser work inside the building. Service from a near-net carrier may require street construction, permits and a new building entry, and the carrier may pass some of that cost to you or ask for a longer contract term to justify it.

Do not rely on the building’s list. Ask each carrier to confirm in writing whether it is on-net at the address, what work is required to reach your floor, and its estimated delivery interval. Your IT lead or a telecom consultant should make those calls during the search, not after the lease is signed.

These questions go to the landlord’s property manager or chief engineer, and in some buildings to a riser management company the landlord has hired to control telecom pathways.

• ✓Which carriers are on-net with their own fiber in the building today?
• ✓How many separate points of entry does the building have, and on which sides of the building are they?
• ✓Where is the main telecom room, and is it protected from water, secured and on backup power?
• ✓How many vertical risers serve our floor, and are they physically separated from each other?
• ✓Is there spare conduit or pathway in each riser, or would new pathway have to be built?
• ✓Who manages the risers, and what fees apply for access, cross-connects or pathway use?
• ✓Does the landlord have access agreements in place with the carriers we want, and are any carriers excluded?
• ✓Is there an exclusive or preferred provider arrangement that limits our choice?
• ✓Is there existing fiber or copper to our suite from a prior tenant, and who owns it?
• ✓How good is mobile coverage on our floor, and does the building have an in-building system to improve it?
• ✓Is rooftop space available for a fixed wireless or satellite antenna, with a pathway down to our suite?

Then walk the route. Have your IT lead or consultant see the entry points, the main telecom room and the riser closets on your floor. Drawings tell you what was designed. A visit tells you whether the second riser exists, whether the closet is shared with a slop sink, and whether anyone has kept it organized.

A carrier cannot simply pull fiber into a privately owned building. It needs the owner’s permission, usually in a written access or license agreement that covers where the carrier may place equipment, how it reaches tenants and what it pays, if anything.

This matters to tenants in two ways. First, if the carrier you want has no agreement with the landlord, your order waits while their lawyers negotiate one, and you have no control over the pace. Second, some landlords have arrangements that favor particular providers or charge others fees that end up in your price.

Ask early whether an agreement exists for each carrier you plan to use. If one does not, ask the landlord to commit in the lease to cooperate and sign a commercially reasonable access agreement promptly.

Furniture can be expedited and paint dries quickly. Fiber installation runs on the carrier’s schedule and depends on things neither you nor the landlord controls: the carrier’s construction queue, municipal permits for street work, access agreements and riser availability.

A common pattern is that connectivity is ordered after the lease is signed and the build-out is under way, on the assumption that it is a utility like electricity. Then the office is finished and the circuit is not. For a team that cannot work without the network, that turns a finished office into an unusable one, and it can push a move past the old lease’s expiration.

1. During the search, get written serviceability and delivery estimates from at least two carriers for each shortlisted building.
2. Weigh those estimates when you choose the building, alongside rent and layout.
3. Place orders as soon as the lease is signed, or earlier if the carrier allows an order contingent on lease execution.
4. Ask the landlord for early access to the suite and telecom rooms so the carrier can work during construction.
5. Give the carrier a single point of contact on your side and have that person check status regularly.
6. Arrange an interim connection, such as a fixed wireless or cellular service, in case the primary circuit is late.
7. Test both connections and the failover between them before move-in day.

Treat the carrier’s delivery date as an estimate until the circuit is installed and tested. Plan the move around a fallback connection.

Connectivity is mostly a matter of diligence, but several rights belong in the lease so the landlord cannot block or tax your choices later.

• The right to use the telecom providers of your choice, with the landlord agreeing to give them reasonable access.
• The right to use building risers, conduits and telecom rooms to connect your suite, on a described pathway, without a separate charge or at a stated one.
• The right to use your own cabling contractor, subject to reasonable building rules.
• Rooftop rights for a backup antenna, with the location, any fee and the pathway to your suite stated.
• Early access before the commencement date for telecom installation, without triggering rent.
• Protection of your pathway and equipment from relocation or disturbance by the landlord or other tenants.
• A clear statement of what cabling you must remove at the end of the term.

Landlords generally disclaim responsibility for interruptions in telecom service, since they do not provide it. That is reasonable for carrier outages. It should not excuse damage or disconnection caused by the landlord’s own staff or contractors in the risers, and your attorney can address that distinction.

Tenant Advisory Group represents tenants and buyers, and for technology companies we collect carrier and pathway information from each building during the proposal stage so that connectivity is part of how spaces are compared and not a surprise after signing.