In telecommunications, where a single physical wire can be used to carry many simultaneous voice conversations, worldwide standards have been created and deployed. E-carrier system, which is revised and improved version of the earlier American T-carrier technology.
Now it is widely used in almost all countries outside USA, Canada and Japan. The line data rate for E1 is 2.048 Mbit/s (full duplex) which is split into 32 time slots, each being allocated 8 bits in turn. It is a ideal for voice traffic because voice is sampled at the same 8khz rate so E1 line can carry 32 simultaneous voice conversions.
What is T1?
A T1 is a term for a digital carrier facility used to transmit a DS-1 formatted digital signals at 1.544 megabits per second. This is made up of 24 digital channels. This requires a digital connection device (CSU/DSU {customer switching unit/digital switching unit}) to connect to four wires to carry the information. Most small Internet providers have a T1 (or a fractional T1) line as their connection to the Internet. A Full T1 should accommodate from one to over 200+ users and other services from an Internet provider. Unlike the modem that is in most computers a T1 line requires a CSU/DSU and the connection. The modem that is in your computer is analog. The newer 56K modems are a transition from analog to user affordable digital technology. The newer ISDN modems are digital to allow for the higher speeds.
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What is E1?
What Is T1?
What is a T1 Line?
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