An advantage emerging from the utilization of dark fiber networks is redundancy. Redundancy is extremely important to businesses that view their communication networks as mission critical. For many businesses, if telecom services are lost, business is virtually shut down. Redundancy as it relates to telecommunications is the ability to receive services (telephone, internet, and/or networking) from more than one, unrelated source. Newly lit dark fiber can often be an excellent source of redundancy because it often does not route through central telephone offices like traditional T1 and DS3 do. If all sources of business bandwidth run through the central office, then when that central office goes down, all businesses served by this central office, lose their ability to communicate. Because dark fiber routes often bypass central offices, they serve as an excellent source of redundancy. Most major businesses seek telecom redundancy to prevent the huge losses that are incurred when telecom circuits go down.