VoIP : PROS & CONSSUMIYA KHANAM 15-005NADIA SHAHRIN CHANDNI 16-044ZAKARIA HASAN 17-006NUSA FARHA 18-041SUCHISMITA BARUA 18-079

What is VoIP? Voice over Internet Protocol It is a method of making calls via

internet protocol networks It is also known as Internet telephony,

IP telephony, broadband telephony It is the ability to transmit and receive

voice telephone calls over an Ethernet data connection

VoIP converts the voice signal from our telephone into a digital signal that travels over the Internet

How Does VoIP Work?Human voice must be packetized

Uses circuit-switching mechanism

Voice packetization involves appending headers with routing information

Multiple voice samples are combined into a packet

Voice packet is switched hop-by-hop through the network

Protocols of VoIP H.323 Media Gateway Control Protocol

(MGCP) Session Initiation Protocol (SIP) H.248 (also known as Media

Gateway Control (Megaco)) Real-time Transport Protocol (RTP) Real-time Transport Control

Protocol (RTCP) Secure Real-time Transport

Protocol (SRTP) Session Description Protocol (SDP) Inter-Asterisk eXchange (IAX) Jingle XMPP VoIP extensions Skype protocol Teamspeak

The H.323 protocol was one of the first VoIP protocols that found widespread implementation for long-distance traffic, as well as local area network services

Network Design for VoIP Step 1: Identify the services you plan to sell. Step 2: Identify the type of carriers or providers with

which you plan to interconnect. Step 3: Determine the interconnection types you

plan to use. Step 4: Determine the call topologies you plan to

use. Step 5: Identify the appropriate deployment

scenario. Step 6: Identify the functional areas you require. Step 7: Identify the required hardware and software

components. Step 8: Identify design and scalability issues. Step 9: Configure and provision components.

Quality of Service (QoS) in VoIP Systems Delay Jitter Packet loss Echo Throughput

Advantages of VoIP

i. Cost savingsii. Rich media serviceiii. Portabilityiv. Low Taxesv. Low Cabling costvi. Featuresvii. Flexibilityviii. Video-Conferencing

ix. Human Resource Leveraging

x. Scalexi. Diversityxii. Single Network/Cablexiii.Remote Maintenancexiv. Connecting to Internetxv. Computer telephony

integrationxvi.Multiple Linesxvii.User Control Interfacexviii.No geographical boundary

Disadvantages of VoIPi. No service during a

power outageii. Emergency callsiii. Reliabilityiv. VoIP Voice Qualityv. Securityvi. Shared Bandwidthvii. Bandwidth Dependencyviii.Compatibilityix. Internal issues

x. Network integrity & QOS

xi. Disadvantages of VOIP to Big Business

xii. Other