how many timeslots available in one E1 ?
how many can be used to carry traffic ?
let’s say 26 TS available for traffic
and let’s say you are talking about the A interface, where there is only 1 channel per TS (1 channel = 64kb/s)
There you go:
BHT = “unknown”
lines = 27
blocking % = 0.5% (0.005)
click on “calc”
BHT = 16.55 erlang