Voice over IPVoice over IP(VoIP)(VoIP)

Hani Al Ruwaili 221942 - Abdulkrem Al Zhrani 232701Hani Al Ruwaili 221942 - Abdulkrem Al Zhrani 232701

Prepared forPrepared forDr. Samir Ghadhban

What is VoIP ?What is VoIP ?

It is the technology that allows us to have phone service over the Internet.

VoIP Protocol & OSI LayersVoIP Protocol & OSI Layers

Application LayerApplication Layer

Soft Phone ( Skype,Net2phon )Soft Phone ( Skype,Net2phon ) Audio cardAudio card Firewall OFFFirewall OFF

Presentation LayerPresentation Layer

CodecsCodecs• PSTN – PCM (Pulse Code Modulation)PSTN – PCM (Pulse Code Modulation)• VoIP compressionVoIP compression• Free Codecs (speex,GSM)Free Codecs (speex,GSM)

Session LayerSession Layer

Session Initiation Protocol (SIP)• Authentication• Communication type• Take care of IP addresses and ports

numbers while transmitting data

Transport LayerTransport Layer Real Time ProtocolReal Time Protocol

• Monitors the quality of the data distribution and provides control information

• RTP header compression saves bandwidth by compressing packet headers

• Provides a separate flow from RTP for UDP transport use

VoIP HardwareVoIP Hardware

Soft PhoneSoft Phone VoIP telephones 100~300 $VoIP telephones 100~300 $

• BandwidthBandwidth• Friendly Interface (WAP)Friendly Interface (WAP)• Audio PortAudio Port

PSTN interface cardsPSTN interface cards Analogue Telephone Adaptors (ATA)Analogue Telephone Adaptors (ATA)

PSTN interface cardsPSTN interface cards

Analogue Telephone Adaptors (ATA)Analogue Telephone Adaptors (ATA)

Quality of ServiceQuality of Service

Latency Latency ((DelayDelay))• High PriorityHigh Priority

JitterJitter• Jitter BufferJitter Buffer

ConclusionConclusion

For people who adopting For people who adopting communications with, VoIP can save communications with, VoIP can save on infrastructure costson infrastructure costs

THANK YOUTHANK YOU

Questions any one?