DS-1 is media agnostic. It can operate over any medium, including fiber, copper and microwave. DS-3, however, because of its higher speeds, requires fiber, terrestrial microwave, or satellite-based microwave.
Telephone companies use T-1 and T-3 over microwave for hard-to-cable areas such as across rivers and canyons, and cellular providers use microwave as one choice between antennas and mobile COs (Central Offices) in cellular carriers' networks.
T-1 on fiber is more reliable than T-1 over copper. Because of decreasing costs of fiber and the lower cost to maintain it, telephone companies deploy fiber to new sites. Fiber is now commonly in place directly to medium and large business premises. When fiber is brought into a user's premises, the end-user must supply the electricity for the equipment on which the fiber terminates. If there is no backup power, customers lose their T-1s and T-3s when they lose power.
Subscribe to:
Post Comments (Atom)
Posts
No comments:
Post a Comment