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Scenario

Enterprise hosts an H.323 IP-PBX locally in the corporate network. There may be multiple IP-PBXs, or the same IP-PBX may be shared by multiple sites. In this model the IP-PBX appears as a peer gateway to the service provider network.

Figure 1: H.323 in an Enterprise IP-PBX


Description

  • Enterprise hosts an IP-PBX locally in the corporate network.
  • The carrier may offer additional features and functionality via an AS or a feature server in the network. However, the calls may be routed directly to the final destination and not via the AS.
  • Peering 
    Spacevars
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     (or Media gateway) is used to break calls out to other networks.