Download - VOIP Pros & Cons
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