Transcript Voice over IP (VOIP)

By
Asma Hamad Alharbi
what is Voice over IP
 Voice over IP (VOIP) is a term that describes a
technology that can carry voice, video and instant
messages, voice email or any media through
Internet Protocol.
Components
 Components required for Voice over IP
 1) PBX system (real time server):Private Branch
Exchange server is responsible for connecting PSTN
and VoIP telephony system that are used in the
company.
 Functions
creating connection between users, maintain, and end
the connections
hosted PBX
 hosted PBX :
Premise PBX
 Premise PBX:
VoIP Clients
 Hard phone or voice over IP phone:
 It has telephone-like shape as but it function as a real
computer system.
 Each client must have three things: password, username,
extension number
 Softphone:
 software that install in the laptop or PC to enable VoIP
communication e.g. Skype software
VoIP Clients
 Ordinary phone:
 The normal telephone can use Voice over IP services if it
connected to a special device ATA that enables converting
from analog to digital signals.
Components
3) Analog Telephone Adapter (ATA):
 It is a small, high dedicated computer which enables the use of
ordinary telephone over the Internet. ATA.
 Functions:
 It provide analog interface for the telephone to communicate via
Voice over IP.
 It is responsible for converting analog signals from ordinary
telephone to digital form that used in data network and vice
versa.
How VOIP works
Advantages and disadvantages
 Advantages :




Low Cost
The voice and data send in the same network.
Features:
Free feature not like ordinary telephone (pay for each service)
 Disadvantages:
 No service during a power outage
 In case no electricity no VOIP communication.
 Voice over IP does not support emergency calls
no trace to the location for the person using VOIP
Thank you