What does T1 E1 mean?
T1 is the North American term whereas the E1 is the European term for the transmission (digital). The data rate of E1 is about 2 mega bits per second. It has 32 channels at the speed of 64 Kbps. It is important to know that 2 channels among the 32 are already reserved.
What is the capacity of E1?
E1 is the European variant of T1. It was defined by the European Conference of Postal and Telecommunications Administrations and provides for a link speed of 2.048 Mbps. This enables each user channel to have 64 Kbps of usable bandwidth. E1 links can simultaneously carry 32 voice calls.
What is T1 interface?
T1 is the basic physical layer protocol used by the Digital Signal level 1(DS1) multiplexing method in North America. A T1 interface operates at a bit rate of 1.544 Mbps and can support 24 DS0 channels.
What bandwidth are T1 and E1 links?
E1 is the European format for DS1 digital transmission. E1 links are similar to T1 links except that they carry signals at 2.048 Mbps. Each signal has 32 channels, and each channel transmits at 64 Kbps. E1 links have higher bandwidth than T1 links because it does not reserve one bit for overhead.
What is an E1 line?
E1 is the European counterpart of the North American T1 line, which transmits at 1.544 Mbps, and E1 and T1 lines can be interconnected for international use. An E1 line uses two wire pairs (one for transmit, one for receive) and time division multiplexing (TDM) to interleave 32 64-Kbps voice or data channels.
What is T1 used for?
A T1 line is a communications transmission service that uses 2 twisted pair copper wires to transmit and receive data or voice traffic. This early form of data connectivity was developed by the Bell System to bring data connectivity to the vast majority of businesses.
How many bits is an E1?
Each E1 frame consists of 256 bits. These bits are arranged in 32 timeslots of 8 bits each. The frame repetition rate is 8,000 per second. Hence data rate supported by each timeslot is 64 kbps.
What is the maximum capacity of T1?
1.544 Mbps
T-Carrier and E-Carrier
| Name | Capacity (maximum data rate) | T1 multiples |
|---|---|---|
| T1 | 1.544 Mbps | 1 |
| T2 | 6.312 Mbps | 4 |
| T3 | 44.736 Mbps | 28 |
| T4 | 274.176 Mbps | 168 |