stc provides point-to-point protected and unprotected DWDM wavelengths on all of the primary inter-city networks in the Kingdom of Saudi Arabia with 2.5G and 10G offerings available. stc offers four 2.5Gbps DWDM network services on four major long-distance fiber network rings in the KSA. These rings include: Northern (3,328 Km), North Eastern (2,337 Km), Central (2,357 Km) and Southern (2,744 Km) networks. Each network offers 16 wavelengths. Its 10Gbps DWDM network services include three long distance network rings divide into Western (1,149 Km), Central (2,358 Km) and Eastern (1,032 Km) rings. Each of these networks offers 40 channels.