... PRI ,V5.2 signalling and SIP protocol; Description:NC-MG800-208 which is the largest capacity Media Trunk Gateway contains 2 ... SIP, H323, SS7, PRI,V5.2,CAS etc. NC-MG800-208, a new generation media transform device which is designed by ... carrier-grade embedded operating system and module structure, NC-MG800-208 is flexible, easy to install, cost effective features; and users ...