As Frame Relay was introduced in the early 1990s, data technology was not originally designed to carry voice. Despite a numerous amounts of valid uncertainties about the reliability of voice over frames, the promise of "free voice" eventually proved too glamorous. It wasn’t long before the modern world began to see users conducting experiments trying to transport voice over their Frame Relay devices, while equipment vendors worked overtime to make the promise of quality voice over Frame Relay (VoFR) a reality. According to the http://www.pro

With impending technology and having the extensive knowledge of the technology in the world today, one may ask by would we need VoIP, or more simply why internetworking? Given that comprehensive standards haven’t been produce to govern the technology, it’s not practical expect the emergence of interoperability standards between technologies in the near future. Internetworking solutions have thus become proprietary, such as Cisco, NORTEL Networks and Lucent Technologies, which offer customers total networking solutions using there equipment and technology. It is essential that the interoperability be transparent to the users, who want to communicate through the network efficiently and without concern for the technological issues involved. Thus, technology continues to evolve to allow effective and efficient communication.

VoIP consists of four basic components to make it function: Voice Processing, Call Processing, and Packet Processing,.

The Call processing utilized the existing public switch network (PSTN) to establish connections. Next a unique number is established for connection purposes. The signal is then processed in several management and maintenance functions which all maintain the integrity of the signal. The Packet processing converts the codec stream to a packet format. Within this process transport headers are added such as the destination physical and logical address. Lastly the protocol is changed from Telephony to packet signaling.

Integrated inside the VoIP structure several processes contribute to receiving a clear signal. First of those is Prioritization techniques which are used differently from those employed by Frame Relay access devices. Prioritization is directly related to QoS. The key IP QoS protocol was RSVP, which allowed the sender to request a certain set of traffic-handling characteristics for traffic flow, but was not widely adopted. (http://www.protocols.com/voip.htm)

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