Electrical Engineering Department EE-430

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Electrical Engineering DepartmentEE-430

• IP Telephony
• Presented by
• Adeeb Al-Harbi
• ID233201

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What is the IP Telephony?

• Transmission of voice traffic over data network
• Also known as VoIP (Voice over Internet
  Protocol)
• And Internet telephony, Broadband telephony.
• VoIP carry telephony signals as digital audio.
• Typically reduced in data rate using speech data
  compression
• techniques, encapsulated in a data packet
  stream over IP
• VoIP is especially popular with long-distance
  calls
• The cost is the main reason for people that are
  using VoIP
• Most people use it for free.

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Why Do We Use IP Telephony?

• IP Telephony has some features that are not
  available with a traditional
• phone
• It can reduce the cost.
• We can make international call with less cost
  rather than the tradition
• telephone
• -You can take your VoIP phone every where you go
  and just connect it to
• the broadband internet and you will receive
  your incoming calls.
• VoIP can also be able to transmit more than one
  telephone call down
• in the same broadband-connected telephone line
  

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How do we use the Voice over IP?

• We have three ways for doing calling over IP
• ATA or Analog Telephone Adaptor, is the famous
  way of using VoIP
• The ATA change the analog signal that your
  home phone use into
• digital signals that can be sent over the
  Internet.
• The IP Phone is just looks like a normal phone,
  with all the same
• pattern. But it has an Ethernet connector
  instead of a normal wall
• jack connector.
• The Computer-to-computer calls are entirely free
  by using some
• service, that mean there is no need for any
  calling plans. The only
• things you need are the software , a good
  internet connection, a
• microphone, speakers and a sound card

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IP Telephony Challenges

• UDP doesn't ensure that packets arrived
  correctly
• Faces problems with Latency and Jitter ,
  variation in delay
• Emergency calls are one of the problems because
  VoIP can't
• find the nearest center geographically.

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Thank you for listening
Adeeb Al-Harbi 233201