A VoIP software architecture has been described for the interworking of legacy telephony systems and packet networks. Some of the key features enabling this application to function successfully are as follows:

• an approach that minimizes the effects of delay on voice quality
• an adaptive playout to minimize the effect of jitter
• features that address lost-packet compensation, clock synchronization, and echo cancellation
• a flexible DSP system architecture that manages multiple channels per single DSP

Carrying VoIP networks provides the most bandwidth-efficient method of integrating these divergent technologies. While the challenges to this integration are substantial, the potential savings make the investment in a quality implementation compelling.