FTTCFTTB

FTTCFTTB is a hybrid broadband deployment concept that combines Fibre to the Cabinet (FTTC) with Fibre to the Building (FTTB). In this approach, fiber is extended closer to end users by bringing a fibre feed to street cabinets and, in selected buildings, into the building itself, while the final connection to individual units may run over existing copper or Ethernet inside the building. The arrangement aims to improve throughput relative to traditional FTTC by reducing the length of copper in the critical last mile.

In practice, an operator may install fibre to the roadside cabinet serving multiple premises (as in FTTC). For higher-demand buildings, a fibre link is then run to a basement or telecom room within the building (FTTB). From that point, the last leg to each dwelling uses the building's internal wiring: either VDSL/G.fast over copper lines or an Ethernet-based intra-building network, with an optical network terminal or network termination device at the building entry.

Performance depends on the final link; FTTC portions use VDSL2 (often with vectoring) and are limited by the copper distance to the cabinet. The FTTB portion can deliver higher performance due to shorter copper runs inside the building or by using Ethernet. Overall, the service can range from tens of megabits per second to several hundred megabits per second per user, with potential for higher speeds in well-planned in-building networks.

Advantages include lower cost and faster deployment than full FTTP, while enabling improved performance over pure FTTC in some buildings. Limitations include variability due to in-building copper lengths, dependence on building access, and less future-proof potential compared to native FTTP.

FTTCFTTB is commonly considered for multi-dwelling units, dense urban neighborhoods, and areas seeking a staged upgrade path to fibre while leveraging existing copper or internal building networks.