Understanding the end-to-end delivery workflow of a BTnet leased line helps IT decision-makers manage project timelines.
The installation process involves a coordinated effort between BT and Openreach, moving through distinct phases: site feasibility, legal permissions, civil engineering, and final network configuration.
While the standard lead time is often quoted as 60-90 working days, the reality depends heavily on the specific hurdles identified during the initial survey. This guide breaks down the technical and logistical steps of the BT leased line installation process, detailing how diversity options, wayleave agreements, and CPE selection impact your go-live date.
| Phase | Responsible Party | Key Activities | Common Delay Factors |
|---|---|---|---|
| Site Survey | Openreach | Feasibility assessment, diversity checks, circuit path planning | Complex site geography, waterways, motorways |
| Planning Permissions & Wayleaves | Openreach / Landlord | Wayleave agreements, listed building permissions, environmental checks | Landlord negotiations, legal term adjustments, incomplete paperwork |
| Civil Engineering | Openreach | Trench digging, duct work, fibre pulling/blowing, splicing | Street works licence delays, road closures, burst water mains |
| CPE Installation | BT | Router selection, device configuration, IP addressing | Equipment availability, complexity of configuration |
| Circuit Configuration & Testing | BT | Bit error rate testing, latency measurement, routing protocol setup | Internal network configuration issues |
| Security & Firewall Setup | BT / Customer | IPS configuration, firewall rules, malware scanning setup | Custom security policy requirements |
Once you have ordered your leased line service, Openreach will be requested to complete an initial site survey to understand the work required to connect your site through to the local BT PoP. At this point in the order journey, you are able to cancel the order if the site survey shows significant work is required that might delay your order and subsequently add costs to your leased line.
The site survey will also determine whether or not any requested diversity options are deliverable. For example, if you have ordered Secure Plus (which provides dual tail circuits and diverse PoP locations), Openreach will need to check the feasibility of delivering the required solution. In some instances, road closures may be required, or it may actually be impossible to deliver the separation mandated. Depending on where you are located, there could even be waterways or motorways that stop your circuit from progressing quickly. You may also need a street works licence before certain civil works can commence. Whatever the results of your survey, BT will work to plan your circuit path and routing to ensure the quickest possible installation of the service. In conclusion, the initial site survey is an essential component of the BT leased line installation process. It aims to ascertain the project’s feasibility, pinpoint potential hurdles, and gather vital information for planning and carrying out the installation.
| Survey Check | Purpose | Potential Outcome |
|---|---|---|
| Circuit path feasibility | Determine physical route from customer premises to local BT PoP | Route confirmed or alternative path required |
| Diversity option assessment (e.g. Secure Plus) | Verify dual tail circuits and diverse PoP locations are deliverable | Diversity confirmed, modified, or deemed undeliverable |
| Geographical obstacles | Identify waterways, motorways, or terrain issues affecting routing | May require road closures or extended civil works |
| Street works licence requirement | Determine if public highway excavation permits are needed | Licence application may extend lead time |
| Excess construction charges | Estimate additional costs for non-standard installation work | Customer may cancel order if costs are prohibitive |
Planning Permissions and Wayleave Agreements
Planning and wayleave requirements typically arise when cables must be laid across any area that demands a structural alteration. For example, permission is required for the installation of poles, masts, or other structural alterations to listed buildings. There are numerous guidelines here, including ensuring there is no negative impact on the environment.
The biggest delays typically occur when a landlord is required to sign wayleave agreements to begin work – there is often a need to adjust legal terms and conditions, and the landlord will want to consider the implications.
Importance of obtaining planning permissions and wayleave agreements, if needed, before installation can proceed.
Openreach will apply for the relevant planning permission before any work to physically install the leased line can take place. This planning process is critical for moving forward as soon as possible to avoid significant delays caused by planning compliance disputes, or simply by incomplete paperwork. Although the process is not controlled by the customer, speaking to your landlord will help to alleviate any concerns. Further guidance on wayleaves is available from Openreach’s official wayleave guidance.
| Scenario | Permission Required | Typical Delay Risk |
|---|---|---|
| Cable laid across third-party land | Wayleave agreement signed by landlord | High – legal terms often require negotiation |
| Installation of poles or masts | Planning permission | Medium – depends on local authority processing times |
| Structural alteration to listed buildings | Listed building consent | High – heritage regulations apply |
| Environmental impact areas | Environmental compliance checks | Medium – must demonstrate no negative environmental impact |
Civil Engineering Work
Civil works can include digging trenches to contain cabling and fibre-optic lines. Applying for the relevant permissions to excavate pavements, roads, and even private land can be problematic and time-consuming, particularly where public highway works require a formal permit or licence such as a street works licence. Once permission is granted, civil work can also take time to organise and plan, with delays often caused by other issues that may occur, such as burst water mains.
Fibre-optic cables are pulled or blown through existing ducts connecting the BT exchange to the customer premises. Adding a second circuit for diversity and resilience can be time-consuming; to ensure diversity, cabling may be required across poles, or additional routes may need to be created, depending on whether or not the customer is willing to pay excess construction charges. The splicing of existing fibre to new fibre is also required, but the extent of this work will be outlined within the site survey process.
The end goal is to connect an ONT (Optical Network Terminal) within the customer’s premises, which is the final point in the process.
| Activity | Description | Permission Required |
|---|---|---|
| Trench digging | Excavation to lay cabling and fibre-optic lines beneath pavements, roads, or private land | Street works licence (public highways), landowner consent (private land) |
| Fibre pulling/blowing | Fibre-optic cables pulled or blown through existing ducts from BT exchange to customer premises | Duct access (typically existing Openreach infrastructure) |
| Diversity circuit installation | Second circuit routed via separate path using poles or alternative routes for resilience | May incur excess construction charges payable by customer |
| Fibre splicing | Joining existing fibre to new fibre along the circuit path | None (engineering task defined during site survey) |
| ONT installation | Optical Network Terminal fitted at customer premises as the circuit termination point | Customer premises access |
Customer Premises Equipment (CPE) Installation
The decision on which router to use depends on bandwidth (throughput) and features (security and Wi-Fi). BT offers standard Cisco small business routers alongside the more feature-rich Cisco networking solutions including secure SD-WAN and Meraki appliances. Configuration of the devices is undertaken by the BT installation team based on the initial required setup. Customers choose Meraki because of the built-in Wi-Fi together with endpoint threat protection, malware scanning, and web content filtering. The initial setup will also include any IP addressing and any other configuration options.
| Feature | Cisco Small Business Router | Cisco Meraki Appliance |
|---|---|---|
| Built-in Wi-Fi | No | Yes |
| Endpoint threat protection | No | Yes |
| Malware scanning | No | Yes |
| Web content filtering | No | Yes |
| SD-WAN capability | No | Yes |
| IP addressing and configuration | Yes | Yes |
| Configured by | BT installation team | BT installation team |
Circuit Configuration and Testing
Prior to handing over customer leased lines (including IP address assignment), BT support engineers will conduct handover tests that include bit error rate testing, latency measurements, and throughput of IP packets. Internal work will also need to be completed, including configuration of routing protocols to propagate your network through to the Internet.
| Test | What It Measures | Purpose |
|---|---|---|
| Bit error rate testing | Rate of errors in the data transmitted across the circuit | Confirms fibre and circuit integrity |
| Latency measurement | Round-trip delay of data packets across the network | Validates performance meets SLA thresholds |
| IP packet throughput | Volume of data successfully delivered per second | Confirms bandwidth matches ordered capacity |
| Routing protocol configuration | Correct propagation of customer network to the Internet | Ensures full end-to-end connectivity |
Security and Firewall Implementation
Intrusion Prevention Systems (IPS) are another critical security option that identifies and prevents malicious activities that may exploit vulnerabilities in your network. BTnet and Meraki offer built-in firewall and IPS options to detect and block threats, including malware and viruses.
Both BTnet and Meraki offer easy installation and configuration of these options via user-friendly interfaces, allowing even those with limited technical knowledge to set up their security system efficiently.
| Security Feature | Function | Available On |
|---|---|---|
| Intrusion Prevention System (IPS) | Identifies and prevents malicious activities exploiting network vulnerabilities | BTnet and Meraki |
| Built-in firewall | Detects and blocks threats including malware and viruses | BTnet and Meraki |
| User-friendly management interface | Allows configuration with limited technical knowledge | BTnet and Meraki |
Ongoing Support and Maintenance
The ongoing support and maintenance of BT leased lines involve the following tasks:
| Task | Description | Key Detail |
|---|---|---|
| Monitoring | Bandwidth, latency, and packet loss tracking | Basic monitoring on Cisco Managed CPE; granular reporting available with Meraki Dashboard upgrade |
| Troubleshooting | Diagnosing and resolving hardware failures, software bugs, and connectivity problems | Covered under the BTnet Service Level Agreement (SLA) |
| Upgrading | Increasing or modifying bandwidth via a modify order | BTnet provisioned by Openreach using dedicated fibre infrastructure |
| Capacity planning | Regular assessment of bandwidth requirements to right-size the service | Prevents overspending on unnecessary resources |
| Backup and disaster recovery | Establishing backup systems and disaster recovery plans | Minimises data loss and downtime during system failure or natural disaster |
| Performance optimisation | Fine-tuning settings, upgrading hardware and software components | Continuous activity by maintenance teams to maintain optimal performance |
Monitoring
BTnet offers some basic bandwidth monitoring tools when using the standard Cisco Managed CPE. For enhanced reporting options, the customer should upgrade to Meraki, which offers granular bandwidth measurements in addition to latency and packet loss through the Meraki Dashboard documentation.
Troubleshooting
Whenever an issue arises, BT engineers are responsible for diagnosing and resolving it as quickly as possible. This might include addressing hardware failures, software bugs, or connectivity problems, which are all defined within the BTnet Service Level Agreement (SLA).
Upgrading
As businesses use more bandwidth over time, upgrading BTnet is completed by submitting a modify order. BTnet is provisioned by Openreach using dedicated fibre infrastructure to deliver guaranteed speeds and reliability.
Capacity planning
Regularly assessing the bandwidth requirements of a business helps to determine if the leased line’s capacity needs to be increased or decreased. This ensures that the business has sufficient bandwidth to support its operations without overspending on unnecessary resources.
Backup and disaster recovery
Establishing backup systems and disaster recovery plans is a vital task to minimise data loss and downtime in the event of a system failure or natural disaster.
Performance optimisation
Maintenance teams work continuously to optimise the performance of BT leased lines, which may include fine-tuning settings or upgrading hardware and software components to maintain optimal performance and ensure customer satisfaction.
