VoIP Tutorial by Gary Brown

NACT VoIP Industry Tutorial ® ® ®The fifth and last section describes the NACT VoIP 7 network m odel. This discussion uses NACT IPAX gateways with VoIP 7 signaling in a In the – PSTN Circuit - switched Model 6 – H.323 Gateways in a Point to Point Configuration 7 – H.323 Gatekeeper/Gateways in a Point to Multipoint Configuration 8 – Multiple H.323 Gatekeepers in a Multipoint - to - Multipoint Configuration 9 – ISC/IETF Network Model 10 – NACT VoIP 7 Multipoint - to - Multipoint Network Model 11 – NACT VoIP 7 Carrier Signaling Interconnection and IP Network Transport 12 – NACT VoIP 7 Carrier Network Signaling Portals 13 Confidential and Proprietary 11 April 2001 1 Page NACT Telecommunications. Inc........... ................................ ................................ ................................ ................................ - Figure 8 .............................. ................................ ................................ - Figure 7 ............................. ................................ ................................ ................................ - Figure 6 ................ ................................ ................................ ................................ ................................ ................................ Figure 5 ..... ................................ ................................ ................................ Figure 4 ............. ............. ...