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Administering Cisco QOS for IP Networks

AVVID (Architecture for Voice, Video, and built-in Data), the most recent improvement from Cisco platforms is redefining the best way companies speak. AVVID permits companies to transmit voice, facts, and video over a unmarried built-in structure, while some time past 3 separate platforms have been required.

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Sample text

While it has been proven that voice services can be offered over the Internet, there is still work to be done to make this as robust as the traditional networks we use today. Of course in the end it may not really matter to the key buyers of communications services. The younger generation does not accord service reliability as high a priority as their parents, as demonstrated by their choice not to own a landline at home. They are perfectly content using their cell phone for all their needs, even if the service quality is not the same as what they could get from landline service.

The ATM protocol answered the primary need for all operators: Quality of Service (QoS). By laying ATM on top of a SONET fiber backbone, operators can realize a very robust packet-based backbone capable of moving all of their aggregate traffic. However, ATM is not the best protocol for voice and video for many reasons. Developers realized that if they developed a protocol specifically for voice and data, it would consist of smaller packets delivered much quicker to the end points. This theory does not work, however, for data networks.

Wireless provides a good model for this discussion because of the planned and methodical approach taken by GSM operators to evolve the networks to support packet-based services. GSM operators first added an overlay network to their existing infrastructure for data traffic. The base station controllers (BSCs) moved packet data traffic away from the mobile switching centers (MSCs) to this packet data network (the General Packet Radio Service, or GPRS). The GPRS network then provided IP facilities into the Internet and other IP-based networks.

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