Ordering an Internet Leased Line is not like signing up for home broadband. There is a feasibility check, a customer application form, a set of company documents, and often some work inside your building before the link goes live. None of it is difficult, but missing one document or one permission is the most common reason a leased line takes three weeks longer than it should.
This guide covers the documents Indian carriers usually ask for, the installation process step by step, and what you can prepare in advance. If you are still deciding whether you need a leased line at all, start with our comparison of leased line vs business broadband.
Documents required for a leased line connection
Leased lines are business connections, so carriers verify the company as well as the person signing. The exact list differs a little between providers, but most will ask for the following.
Company documents
- Customer Application Form (CAF), filled in, signed by an authorised signatory and stamped with the company seal
- Company PAN card
- GST registration certificate, which you can download from the GST portal if you do not have a copy to hand
- Proof of business registration: certificate of incorporation for a private or public limited company, the LLP agreement for an LLP, the partnership deed for a partnership firm, or a Shop and Establishment certificate or similar for a proprietorship
- Purchase order or signed quotation confirming bandwidth, contract term and price
Installation address documents
- Proof of address for the installation site, usually a rent or lease agreement, a recent electricity bill or a property document in the company's name
- Building permission or NOC, if your landlord or building management controls how cables enter the building and where equipment can sit. Many commercial towers in Gurgaon, Noida and Mumbai have a facility team that must approve fibre work in advance
Authorised signatory documents
- Board resolution or authorisation letter naming the person allowed to sign on behalf of the company
- Photo ID and address proof of the signatory, such as PAN, Aadhaar or passport
- Passport-size photograph of the signatory
Some carriers also ask for a short undertaking about how the connection and its IP addresses will be used, for example that the bandwidth will not be resold. This is routine for business internet in India and is simply signed along with the CAF.
Tip: scan everything as clear PDFs before you start. Blurry phone photos of documents are the second most common cause of an order being sent back.
The leased line installation process, step by step
Here is how a typical order moves from first conversation to a working link.
- Requirement discussion. How many people use the internet, which applications matter most, whether you need static IPs, and whether a backup link is required.
- Feasibility check. The provider checks whether its fibre already reaches your building (an "on-net" building) or how far the nearest point on its network is.
- Site survey. An engineer may visit to find the cable entry route, the location for the termination equipment and the path to your server room or rack.
- Proposal and paperwork. You receive the commercial proposal, then submit the CAF, documents and purchase order listed above.
- Order processing. The carrier verifies the documents and books the order. Static IP addresses are allocated at this stage.
- Last-mile work. If fibre is not already in the building, the carrier lays it from the nearest network point. This can involve digging permission from local authorities and coordination with your building.
- Equipment installation. Fibre is terminated in your premises and the carrier's equipment is installed and powered. The hand-off to your network is usually an Ethernet port or an optical port.
- Configuration and testing. Your router or firewall is configured with the WAN IP details, and the link is tested for speed and stability.
- Acceptance and handover. You confirm the link works as ordered and receive the circuit ID and support contacts. Billing normally starts from this point.
How long does leased line installation take?
The single biggest factor is whether fibre already reaches your building.
When the building is already on-net
If the carrier already has fibre and capacity in the building, installation is mostly paperwork, internal cabling and configuration. Delivery in one to two weeks after documents are cleared is common.
When new fibre has to be laid
If fibre has to be laid from the street or from a nearby network point, timelines depend on distance, digging permissions and building access. Three to six weeks is a realistic range, and sites that need long cable runs or difficult approvals can take longer.
That is why we always confirm feasibility before quoting a date. A provider that promises seven-day delivery without checking your exact address is guessing.
What to prepare in your office before installation
A little preparation stops the engineer's visit from turning into two or three visits.
- Space and power. Keep a spot in your rack or server room with a power socket on UPS for the carrier's equipment.
- A router or firewall. The leased line needs a device on your side to route traffic and protect the network. If you do not have one, plan it with your provider. Our managed firewall and security service covers this.
- Internal cabling. Make sure there is a cable path from the point where fibre enters to the room where your network equipment lives.
- A named contact. Someone who can let engineers in, deal with building management and approve test results on the day.
- Building permission in writing. If your facility team needs a work permit for cabling, apply early. It can take several days in larger towers.
Common reasons leased line orders get delayed
Most delays come from a handful of avoidable issues.
- Name or address mismatch between the CAF, GST certificate and address proof
- The signatory's authorisation letter missing or unsigned
- Building management not informed, so engineers are turned away at the gate
- No rack space, power or UPS ready when equipment arrives
- Right-of-way or digging approvals taking longer than expected for new fibre
Sorting out the first four before the order is placed can save a surprising amount of time. The fifth is out of your hands, which is another reason to choose a carrier that is already in or near your building.
Planning a backup from the start
If the internet going down would stop billing, dispatch or customer support, plan a second link while the first is being ordered. The backup should ideally come from a different carrier and enter the building through a different route, so a single cable cut does not take both down. Our guide to dual-carrier failover explains how this works in practice.
How Adapt India Network helps
We handle the leased line process end to end for businesses across Delhi, Gurgaon, Noida and the rest of India, on the enterprise networks of Tata Tele Business Services and ACT Fibernet. We check which carriers already reach your building, prepare the paperwork with you, coordinate the site work and stay involved until the link is accepted. See our Internet Leased Line service or contact us for a feasibility check at your address.
