Question

please tell very important
what is this e1 e2 e3 meaning?
what does it want to say​​​

Answer 1

Answer:

To see the relationship between the E-carrier system, the T-carrier system, and DS0 multiples, see digital signal X. ... E2 (E-2) is a line that carries four multiplexed E1 signals with a data rate of 8.448 million bits per second. E3 (E-3) carries 16 E1 signals with a data rate of 34.368 million bits per second.