Review of Literature
This chapter presents the concepts, facts, and studies related to the present study.
Related Literature
Voice-over-Internet Protocol is an interesting fact that makes a change in the world of telecommunications. It has almost banished the traditional phone lines from the business and home use all over the globe.
Definition and Services of Voice-over-Internet Protocol
VoIP or Voice-over-Internet Protocol is a protocol that makes the transmission of voice via internet connection possible or to other networks which uses packet switching method. It works through broadband and uses the internet to direct its calls. Packet – switching works in sending data packets through a network down into thousands of possible paths. VoIP converts the voice signal from the caller into digital signal before the recipient answers the call.
According on an internet site, (http://www.whichvoip.com/voip/articles/voip_ history.htm) VoIP technology begun in the mid 90’s when the Voltech Company released the software called Internet Phone which was designed to run on a home PC and uses the H.323 protocol instead of an SIP (Session Initiation Protocol) protocol that is used today; and was utilized by a microphone, which is commonly called headphone today, speakers and sound cards. This software represents as the first internet phone.
The site (http://en.wikipedia.org) held, VoIP transmit telephone calls over the same broadband connection. It has advanced telephony features such as call routing, screen pops and IVR implementation. VoIP are portable and work in any location with strong broadband signals and connections; and can access a phone line from many places. VoIP offers unlimited local and international calls with a fixed price; and can allow the consumer to have more than one phone number. There is almost zero charge for its conference calls, call forwarding, automatic redial, and caller IDs.
VoIP is an interesting technology with interesting services. The common services it offers are the following from the site (http://communication.howstuffworks.com/ip-telephony11.htm):
1. ATA (Analog Telephone Adaptor)
2. IP Phones
3. Computer to Computer
The first service allows connecting the ordinary telephone to the computer with internet connection in order to use VoIP. ATA converts the analog signal into digital signal before it is being sent over the internet. The IP phones are specialized phones for use with IP calls. It uses RJ-45 Ethernet connector which connects directly to the internet router and has the necessary software and hardware devices that enable an IP call. The VoIP service over computer-to-computer is the easiest way to use VoIP as long as the in internet connection is present; and the necessary hardware equipments are present such as the microphone, speakers and sound cards. Call cost is totally free no matter the distance in this type of VoIP service.
But there is also a limitation with the services offered by VoIP. According on the site, (http://www.onguardonline.gov/topics/ voip.aspx) in VoIP, there is no need to change for another phone number when the consumer wanted to keep its old regular phone number; but the processing is time costly. Temporarily, the consumer will take the option of using a new phone number. However, Phone numbers of VoIP is not included in a telephone directory listing unlike with that of a telephone registered to a local phone company. Thus, the VoIP user does not have an access to any directory assistance service.
With VoIP service, it is possible to call to an ordinary telephone connected to an adaptor, to a special VoIP phone, or directly from the computer to another computer. With that, anyone can call the number from any regular phone without using any special software and equipment.
Finally, from an internet site, (http://articles.directorym.com/VoIP_Phone_ Service_Vermont-r800278-Vermont.html#8001277) whether the computer is turned off, as long as the connection in the internet is active, VoIP is still available for access and usage. Whether in travel, VoIP can also be in use as long as the adapter or the special software and hardware is present, and the connection to the internet is activated.
This chapter presents the concepts, facts, and studies related to the present study.
Related Literature
Voice-over-Internet Protocol is an interesting fact that makes a change in the world of telecommunications. It has almost banished the traditional phone lines from the business and home use all over the globe.
Definition and Services of Voice-over-Internet Protocol
VoIP or Voice-over-Internet Protocol is a protocol that makes the transmission of voice via internet connection possible or to other networks which uses packet switching method. It works through broadband and uses the internet to direct its calls. Packet – switching works in sending data packets through a network down into thousands of possible paths. VoIP converts the voice signal from the caller into digital signal before the recipient answers the call.
According on an internet site, (http://www.whichvoip.com/voip/articles/voip_ history.htm) VoIP technology begun in the mid 90’s when the Voltech Company released the software called Internet Phone which was designed to run on a home PC and uses the H.323 protocol instead of an SIP (Session Initiation Protocol) protocol that is used today; and was utilized by a microphone, which is commonly called headphone today, speakers and sound cards. This software represents as the first internet phone.
The site (http://en.wikipedia.org) held, VoIP transmit telephone calls over the same broadband connection. It has advanced telephony features such as call routing, screen pops and IVR implementation. VoIP are portable and work in any location with strong broadband signals and connections; and can access a phone line from many places. VoIP offers unlimited local and international calls with a fixed price; and can allow the consumer to have more than one phone number. There is almost zero charge for its conference calls, call forwarding, automatic redial, and caller IDs.
VoIP is an interesting technology with interesting services. The common services it offers are the following from the site (http://communication.howstuffworks.com/ip-telephony11.htm):
1. ATA (Analog Telephone Adaptor)
2. IP Phones
3. Computer to Computer
The first service allows connecting the ordinary telephone to the computer with internet connection in order to use VoIP. ATA converts the analog signal into digital signal before it is being sent over the internet. The IP phones are specialized phones for use with IP calls. It uses RJ-45 Ethernet connector which connects directly to the internet router and has the necessary software and hardware devices that enable an IP call. The VoIP service over computer-to-computer is the easiest way to use VoIP as long as the in internet connection is present; and the necessary hardware equipments are present such as the microphone, speakers and sound cards. Call cost is totally free no matter the distance in this type of VoIP service.
But there is also a limitation with the services offered by VoIP. According on the site, (http://www.onguardonline.gov/topics/ voip.aspx) in VoIP, there is no need to change for another phone number when the consumer wanted to keep its old regular phone number; but the processing is time costly. Temporarily, the consumer will take the option of using a new phone number. However, Phone numbers of VoIP is not included in a telephone directory listing unlike with that of a telephone registered to a local phone company. Thus, the VoIP user does not have an access to any directory assistance service.
With VoIP service, it is possible to call to an ordinary telephone connected to an adaptor, to a special VoIP phone, or directly from the computer to another computer. With that, anyone can call the number from any regular phone without using any special software and equipment.
Finally, from an internet site, (http://articles.directorym.com/VoIP_Phone_ Service_Vermont-r800278-Vermont.html#8001277) whether the computer is turned off, as long as the connection in the internet is active, VoIP is still available for access and usage. Whether in travel, VoIP can also be in use as long as the adapter or the special software and hardware is present, and the connection to the internet is activated.
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