O carrier

This article is about the carrier system in general. For the carrier system in the Connections Museum Seattle, see CMS:OA Carrier.

O Carrier is a 16 channel short haul open wire carrier system designed to expand capacity of existing open wires, particularly in rural areas. The 16 channels are divided into four groups: OA, OB, OC, and OD.

Principles of O carrier and N carrier are combined in ON carrier.