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Lesson 1: Networking Basics

Lesson 2: OSI Reference Model

Lesson 3: Introduction to TCP/IP

Lesson 4: LAN Basics

Lesson 5: Understanding Switching

Lesson 6: WAN Basics

Lesson 7: Understanding Routing

Lesson 8: What Is Layer 3 Switching?

Lesson 9: Understanding Virtual LANs

Lesson 10: Understanding Quality of Service

Lesson 11: Security Basics

Lesson 12: Understanding Virtual Private Networks

Lesson 13: Voice Technology Basics

Lesson 14: Network Management Basics

Lesson 15: The Internet

 

 

 

Lesson 13: Voice Technology Basics

Convergence of Voice and Data | Voice Technology Basics | Voice over Data Transports | Applications |

Sample Migration

Sample Migration

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The PBX tie line also goes away now that its function has been replaced by a path between the voice-capable routers.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