Tele-Communication (Telecom) Terms Glossary and Dictionary
OC48: Optical Carrier 48
Optical Carrier 48 (OC48 or OC-48) is a fiber optic line with a SONET rate of 2488.32 Mbit/s (payload: 2405.376 Mbit/s; overhead: 82.944 Mbit/s) or 48 times the basic SONET signal transmitting at 51.84 Mbit/s. OC-48 connections are used as the backbones of many regional ISPs. OC-1 is equivalent to STS-48 (Electrical level) and STM-16 (SDH).