1.E1 is of 2mbps,bco’z it is defined in its standard….having 32 time slots of 64k….while T1 is of 1.54mbps…having 24 time slots of 64k…mostly e1 is used…
2.in 1 e1 max 13 trx r possible,see the trafic manager for detail..where u define 14th one?
4.e1/t1 is used when we want to drop or bypass physical channel in bts,..like when fiu is used,e1/t1 card is required….