Celcom Timur (Sabah) Sdn. Bhd. ("CT Sabah") was established as a joint venture company with the purpose of providing fibre optic transmission services in Sabah.
In tandem with its main business in providing the physical fibre cable transmission service primarily to telecommunication network operators, CT Sabah had completed its trunk fibre optic network in Sabah, including submarine cables, making it the only company currently having a comprehensive trunk fibre network in Sabah. The fibre optic network spans from Labuan to Tawau.