Voice over Internet Protocol transfers voice through IP packets through the Internet. VoIP changes analog (human voice) to digital use an ADC (analog to digital converter). Then, it digitalizes voice in data packets and transmits it. Finally, it reconverts them in voice at destination...

For briefly overview please go through the VOIPIntroduction.ppt. For more details please see Introduction of Voice over IP.doc.

Pulse Code Modulation (PCM) is a digital scheme for transmitting analog data. It is the process of changing/converting signals from one form (analog) to the other (digital)...

There are many protocols support Voice over IP, for overview of these protocols please see VOIPProtocols.ppt. For more details please see the documents below.

RTP is the Internet-standard protocol for the transport of real-time data, including audio and video. Applications typically run RTP on top of UDP to make use of its multiplexing and checksum services...

This is the ITU-T’s (International Telecommunications Union) standard that provides the technical requirements for voice communication over LANs. The standard encompasses both point to point communications and multipoint conferences...

MGCP is a control protocol (just like SIP), allowing a central operator (generally, a server) to monitor and analyze events in IP phones and gateways and instruct them to send media to specific addresses...

RTSP, the Real Time Streaming Protocol, is a client-server protocol that provides control over the delivery of real-time media streams. It provides "VCR-style" remote control functionality for audio and video streams, like pause, fast forward, reverse, and absolute positioning...

The network delay and Quality of Service are the most hindering factors in the voice-data convergence. The most promising solution has been developed by IETF viz., RSVP...

This protocol is used for advertising the multicast conferences and other multicast sessions...

SDP is intended for describing multimedia sessions for the purpose of session announcement, session invitation etc...

Hardware is the fundamental element to build the VoIP network. This section shows the basic hardware contained in the VoIP network.

When a voice conversation is passed across a network using packet switching, the voice “data” becomes the payload of a packet or frame, which is subsequently packet-switched across the network according to the technology or protocol used...

Since VoIP is a real-time service and is sensitive to delay and packet loss, Quality of Service (Qos) becomes an important issue to VoIP.

There are numerous threats to a VoIP network. This leads VoIP another important issue, security issue.

This end of semester report and presentation gives the basic techniques needed to implement VoIP.

PLANET is on of VoIP product vendors. This report search the whole network solutions for office use include VoIP.

The user brief is based on the user side of view. When the users willing to have new services (such as install new system or upgrade their system), they first provide a list (User Brief) to the supplier to tell them what they want. Then the supplier should try their best to get the users requirements. This is the first step of doing a project.

This report is based for the project brief. This research report how the services VoIP can provide compare width PSTN and some functions it can provide.

Project proposal is the second step of doing a project. It is for a company to first analysis the project.

Generally there are three options the user can choose to use VoIP, third party, software or hardware. This report provides the differences, advantages and disadvantages between them.

This report provides the different VoIP vendors and their product features.

This report provides the implementation plan for the CNZ Company. The time lines shows the time planning for this project.

This final report and presentation summarize this VoIP project.