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ATM Telephony Integration an abstract |
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To accommodate effective communication within an organization, it is necessary to install a computer network and a separate network for voice communication. The technology needed to merge data networks and voice networks has arrived. Asynchronous Transfer Mode (ATM) networks are capable of carrying both data and voice traffic. In this project, we will implement a computer based Private Branch Exchange (PBX) system. The design includes a PCI card that connects to a PC connected to the ATM network. The card will have an interface connector to an ordinary PSTN telephone handset. At the heart of the PCI card is the TMS320C3x DSP. It will handle all telephony-related processing such as DTMF detection, tone generation, and ringing. Aside from that, the TMS320C3x will be used to implement voice compression to efficiently use the bandwidth. ITU-T Recommendations G.728 Low-Delay Code Excited Linear Prediction (LD-CELP), a 16 kbps speech compression method, will be used in this project. The ATM network has the capability of easily implementing additional PBX features such as call forwarding, voice mail and others. Overall, the system will be similar to the usual PBX except for the single media that is being shared for data and voice traffic. |
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