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No article in the knowledge graph for Leased Line Network yet.
Who is Leased Line Network?
A leased line network is a private, fixed-bandwidth, point-to-point or multipoint telecommunications circuit provisioned by a service provider for the exclusive use of an enterprise customer.
- Dedicated, uncontended connectivity services for enterprise Wide Area Network (WAN) and site-to-site networking
- Symmetrical bandwidth options for data, voice, and video transport
- Support for Layer 2 and Layer 3 network architectures over fiber or copper access
- Service Level Agreements (SLAs) covering availability, latency, and fault repair windows
- Integration with managed services such as Multiprotocol Label Switching (MPLS) Virtual Private Network (VPN) (WAN connectivity), internet access, and cloud on-ramps
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More About Leased Line Network
A leased line network is a connectivity service model in which an operator or carrier provides a reserved physical or logical circuit between customer locations, typically using fiber or high-capacity copper access, for exclusive use by a single enterprise tenant.
Enterprises use leased line networks to interconnect headquarters, branch offices, data centers, and cloud access points with predictable bandwidth and performance, often as part of a broader WAN architecture.
Service providers deliver leased lines using technologies such as Ethernet over fiber (LAN/WAN connectivity), Synchronous Digital Hierarchy (SDH) or SONET (TDM transport), and occasionally legacy interfaces like E1/T1, but current deployments focus on Ethernet-based services at various capacities.
At Layer 2, leased line services often present as point-to-point Ethernet virtual circuits, which enterprises can integrate into their own routing domains, Virtual LAN (VLAN) designs, and Quality of Service (QoS) policies, treating the carrier network as a transparent transport layer.
At Layer 3, leased line access may be used as the underlay for MPLS VPN (WAN connectivity) or IP-VPN services, where the provider manages routing, Traffic Engineering (TE), and sometimes security policies, reducing operational overhead for the customer.
Leased line networks differ from broadband or shared internet access in that bandwidth is not contended across multiple customers on the same access link, which supports more deterministic latency, jitter, and throughput characteristics under defined SLAs.
Typical SLAs for leased line networks include metrics for uptime, mean time to repair (MTTR), packet loss, and latency, with associated credits or remedies, which align with enterprise requirements for hosting business applications, voice over IP, and real-time collaboration workloads.
From a topology perspective, enterprises may combine multiple leased lines into hub-and-spoke frameworks, partial mesh, or full-mesh designs, sometimes using dynamic routing protocols such as Border Gateway Protocol (BGP) or Open Shortest Path First (OSPF) at the customer edge to manage path selection and resilience.
Leased line networks are commonly positioned in marketplace taxonomies under enterprise connectivity, dedicated internet access, Ethernet Private Line (EPL), Ethernet virtual private line (EVPL), and private WAN services, often forming the underlay for Software-Defined Wide Area Network (SD-WAN) (WAN edge) overlays.
These services are used by sectors such as finance, healthcare, manufacturing, and public institutions where deterministic performance, traffic separation from public internet, and contractual SLAs are core selection criteria for network design and procurement.
Our description of Leased Line Network. Updated December 2025.
