T1 lines are some of the fastest data transmission mediums in normal use. There are over three million T1 Circuits in use in the United States. There are some transmission systems providing much faster data transmission but T1 lines have been steadily expanding in use since the adoption of the thorough in the late 1950s/early 1960s. The introductory T1 bandwidth was carefully by empirical data generated by At&T tests in Chicago. The data came from pushing data rates higher until error rates became unacceptable, then backing down sufficient to leave an thorough margin.
With more modern technology, the actual data throughput could be higher but changing the thorough would obsolete existing infrastructure. The European thorough (E1) uses distinct frame rates and other differences to deliver higher bandwidth. The thorough for T1 bandwidth is 1.544 Mbps. The actual, usable bandwidth is reduced by framing requirements to 1.536 Mbps. A T1 can be combined in up to three pairs (six lines) to deliver up to 9.216 Mbps. Point to Point, Data, Voice, Bonded, Multi Site, Vpn, or Internet backbone connectivity services are all available from T1 line providers. Up to 24 phone lines or up to 192,000 bits per second from one unchannelized T1 line. These services are full-duplex; meaning data in practically any form is transmitted and received at the same time.
High Bandwidth
The T1 bandwidth can be matched by a full speed Dsl line. Dsl service degrades over distance from the local phone company's switching center and has service capability usually specified as "best effort". This means service outages can increase over hours or even days. While this may be thorough to a residential user, enterprise users that depend on phone/internet service for wage cannot tolerate long outages. T1 line leases often comprise T1 service agreements that cut the providers' fees significantly any time a T1 service becomes unavailable. The outages are measured in minutes, development it foremost to the victualer that service is restored quickly.
Less high-priced implementations of the T1 technology are available to businesses that do not wish the full T1 bandwidth. Fractional T1 service utilizes only part of the full T1 capacity and allows reduced costs. This is marketed as "point-to-point" service by some carriers. The cost allowance is not proportional. There is a obvious whole of fixed cost complicated in T1 line service. These costs are not reduced as bandwidth is reduced so a fractional T1 with 50% of full T1 bandwidth will cost only 15%-20% less than the full T1. One advantage is that fractional T1 is de facto and fast upgraded to full bandwidth when a business's requirements certify the added expense.
Burstable T1 lines and metered T1 Circuits offer mountainous cost savings to businesses that wish full T1 bandwidth only a few times a month. Metered service charges the buyer only for the bandwidth used. Burstable T1s are capable of full T1 bandwidth when required but cut available bandwidth when full capacity is not needed. The guaranteed reliability of T1 line service is more foremost to many businesses than the actual T1 bandwidth. Dsl can come close to matching T1 speeds but cannot coming the reliability. Bonded T1's can multiply the available bandwidth up to a point. Beyond that, the T3 line becomes attractive. Some carriers offer fractional T3 service to keep costs within reach of mid-sized businesses.
Exploring T1 Line Bandwidth Limits and Choices
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