Cisco, Network Equipment manufacturer / supplier in China, offering 6-Line Carrier-Grade IP Phone GRP2616Grandstream GRP2616 | 6-Line Carrier-Grade IP Phone 5" Touchscreen with Glove Mode, 10-line Carrier-Grade IP Phone GRP2615, Grandstream GRP2614 | 4-Line Carrier-Grade IP Phone | MIL-STD-810H & IP66 Certified | -40°C to 75°C Operation | ATEX Zone 1 Explosion-Proof | 7-Year War and so on.