1. VOIP
BY: PAUL MAKRAM FARES
Presented TO: Prof. Shawkat K. Guirguis

2. AGENDA
 What is VoIP
 Why Migrate to VoIP
 General VoIP Configuration
 Advantages
 Disadvantages

3. DISCLAIMER
 This presentation is presented at a very high
level overview of the technology used to
provide a basic understanding of IP Telephony
commonly know as “VoIP”.
 The information presented is taken from
previously release
 DoD and DISA documentation regarding the
integration and the deployment of VoIP
technology.

4. What is VoIP?
 VoIP stands for “Voice over the Internet
Protocol” and is also referred to as IP telephony.
This technology enables users to:
 Make calls by moving packets of information
over the Internet using broadband network
connection to make phone calls to other VoIP
and regular phone users and ”Public Switched
Telephone Network (PSTN)” or analog
telephones

5. VoIP Overview
  Telephony is a process that enables the
IP
transfer of voice data over a packet switched
network as opposed to the traditional circuit
switched network.
  The transmission of voice packets over the
Internet Protocol (IP) is known as VoIP and is
implemented properly holds the promise of
converged networks and unified
communications

6.  The Joint Chief of Staff (JCS) Military
Communications Electronics Board (MCEB)
endorsed three near term major operational
drivers for the introduction of VoIP services to
support network centric warfare:
 Convergence of secure desktop services at
major command.
 Small footprint and highly mobile
 Investment many Military Departments and
Agencies have deployed VoIP

7. Emerging Technology
 Voice Over Internet Protocol (VoIP) is an
emerging
technology that is a critical component of
network centric warfare.
 All major common carriers and
telecommunications switch vendors plan to
migrate to VoIP.
 This is the key concept to effective Net
centric warfare

8. VoIP Configuration
 Although a very different technology and approach to
providing voice services, some of the same component
concepts that make up the PSTN are also found in VoIP
networks.
 VoIP networks must perform all of the same tasks that the
PSTN does, in addition to performing data and signaling
gateway functions to the existing public network.
 There are four major components :
 The IP network
 Call processor/controllers
 Media/signaling gateways
 Subscriber terminals

9. Convergence
 A VoIP network can be viewed as one
logical switch in distributed form.
 The IP infrastructure must ensure smooth
delivery of voice and signaling packets to the
VoIP elements.

10. IP Centric
 An IP Centric VoIP architecture is designed
around an IP based core switching system.
 Centric solutions have
 distributed IP devices that work together to
perform the functions of a TDM based circuit-
switch.

11. VoIP Advantages
 Low cost
 Use existing infrastructure
 Scalability
 Call forwarding
 Voice mail and fax applications
 Call waiting
 Caller ID
 3 way calling
 Send documents and/or pictures while you talk
at the same time

12. VoIP Disadvantages
 Lack of continuous service during a power
outage
 Emergency calls (911) (Problem of locating call)
 Sound quality and reliability
 Vulnerable to same attacks as IP data networks
 Vulnerable to spam (Spam over Internet
Telephony)
 Toll fraud (Call spoofing)
 Possibility of data loss.

13. Conclusion
 Voice Over Internet Protocol (VoIP) is an
emerging technology that is a critical
component of network centric warfare, and is
associated with potential command center
desk top convergence, mobility
enhancements, infrastructure reduction,multi-
media collaboration, and cost avoidance.