Intelligent 1U4E1PCM30 has 4 E1 ports, 30 channels. All of the 128*128 time slots can be cross-connected flexibly. this function. Can make 1 E1 of 30 channels of voice data into other 3 E1 ports and merger unsaturated time slots which are from some other E1 ports. Generally speaking, it makes the single E1 interface card of the county bureau come to 3 E1 interface cards in order to give numbers to sub-branch agencies.
