Tightly integrated voice gateways encode and decode voice signals, and the Cisco low-latency packet network supports the QoS that voice services require. Call Control Layer processes call requests and instructs the Connection Layer to establish the appropriate bearer connection. Today, H.323 call-control standards are used. All this provides complete interoperability between legacy TDM environments and packet networks. Service Application Layer applies the service logic.
Developers can therefore create new applications at Internet speeds.
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