Cable boxes | telephone junction box | Audio transfer box | telephone wiring boxes | speed transfer case | of large number of communications cable boxes specifications are single 100 pairs and 200 pairs, 300 pairs and 400 pairs, 600 pairs and 800 pairs, 900 pairs 1200 pairs, 1500 pairs, 16 pairs, 2000 pairs 2500 pairs. Duplex 800 pairs 1200 pairs, 1800 pairs 2400 pairs, 3000 pairs 3200 pairs, 4000 pairs 5000 card type communications cable boxes, using advanced technology in accordance with international advanced standards of production status 80s cable wiring devices, for local, trunk cable and distribution cable transfer of the use of urban telecommunications networks. is a high capacity of transfer sub-line equipment for overhead, floor, wall mounting.