PBX Networking to New Voice Networking

The next slides graphically illustrate the migration from traditional circuit-switched voice networking to the new packet-switched integrated data/voice/video networking.

Here you see two offices… one in Vancouver and one in Toronto. Each has a PBX to handle the office but all calls inter-office go through the PSTN.

By adding voice-capable routers to the existing data network, connecting them to the existing PBXs, the company can first do toll bypass. This represents bandwidth no longer needed for voice traffic that is now going through the routers.

The PBX tie line also goes away now that its function has been replaced by a path between the voice-capable routers.

You can see here the end result. A much simplified network and considerable cost savings.

– Summary –

As we have seen today, companies are interested in data/voice/video integration for very basic business reasons:

Reduce costs: Phone toll charges; cost of multiple management methods and multiple types of expertise required to support multiple types of networks; capital expenditures on multiple networks

Enable the new applications needed for business growth:
 Multimedia (data/voice/video) applications require technologies based on multimedia standards

Simplify network design:
 Through strategic convergence of data, voice, and video networks

And decision-makers have come to the conclusion that recent technical advancements have brought the benefits of voice/data integration within reach, such as: H.323 standards; gateways; voice-compression, silence-suppression, and quality-of-service technologies.

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