What is mean by E1 using in telecom?

Answer 1

E-1 is the European standard for T-1. It is a circuit capable of data transfers of 2.084 Mbps or handling 30 voice channels. As you can see, it is a bit higher of a standard compared to a T-1 but it is the standard hierarchy for the region.

Answer 2

E1 refers to the multiplexing and transmission technology of digital data over a pair of wires used by European carriers.

When you have to send multiple digital data from different user/ sources over a long distance then you have to first multiplex it into a single data stream. This is multiplexing and then you have to transmit it over a single transmission media, which is a pair of wires. The maximum number of multiple data stream that can be multiplexed in E1 is 31. Suppose there are 31 different users. These 31 signals will be multiplexed by a multiplexer device into a single data signal and transferred over a channel at the rate of 2.048 Mbps.

This technique as a whole is called E1. The similar technology used in US,Canada is called T1 with 23 user data supported.

Answer 3

Have a look at below details from wikipedia. http://en.wikipedia.org/wiki/E1_carrier Cheers!