Inter-tandem transit meaning

Inter-tandem transit is a wholesale telecoms interconnection route in which traffic is conveyed via two tandem switches with a single inter‑tandem transmission link between them, typically where the originating and terminating networks connect to different tandem nodes. In practice it is a descriptive industry term, not generally defined in legislation or case law; its scope, technical parameters and pricing are set out in operators’ reference interconnect offers (RIOs) and standard interconnection agreements, and referenced in Ofcom and ComReg market reviews and price controls for transit/conveyance services. Key legal features include distance‑related charging—commonly divided into three distance bands—together with specified quality‑of‑service metrics, routing and resilience obligations, and billing and recording requirements. It is frequently engaged when drafting or interpreting interconnection schedules, negotiating wholesale transit charges, and resolving billing or routing disputes, particularly where a provider with significant market power supplies conveyance between two tandems. Usage and legal significance are broadly consistent across England & Wales, Scotland, Northern Ireland and Ireland, though the precise banding thresholds, tariffs and service descriptions are those in the relevant operator’s RIO or any applicable regulatory direction.