Alliance Implementation of IP TELEPHONY Voice over IP (VoIP)

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Alliance Implementation of IP TELEPHONYVoice
over IP (VoIP)

• Saeéd Hesami

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Project Guiding Principles

•      To achieve the business benefits
•      Make decisions with the constituents and
  for them
•      Provide continuous communication and
  document candid feedback
•      To ensure the Voice over IP, video
  conferencing, and high transmission speed are
  within scope, schedule, and budget

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Project Objectives

• Develop and test the business case and technical
  feasibility.
• Established a hardened end-to-end network utility
• Provide a converged voice and data network.
• Workstation to workstation or executive to staff
  multicast video conferencing over IP
• Provide a network that has the ability to
  transmit data over one GB/Per second

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What is IP Telephony?
Compression to less than 32Kbps
Transfers through Routers, LAN Switches etc,
using their Protocols
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Why VOIP?

• Cost reduction for Voice Traffic
• Convergence of Voice and Data leverages
  infrastructure investment
• Big cost reduction for intra-site fax traffic
• Enables new multimedia applications to
  increase productivity
• VoIP can save you real money.

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Why VOIP, Cont.

• Toll reduction
• Not only site to site, use packet network to
  bypass long distance network, and place calls
  from local point of presence

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Benefits of VOIP

• Low Cost of public Internet
• Long distance call for the price of local PSTN
• Integration of voice and data applications
• Internetaware telephones
• Intranet Telephony
• Trivial implementation of existing services
• Video conferencing
• Voice traffic on data networks- 40 reduction in
  costs

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VoIP Placement

• Telephone Replacement
• IPHONE, Ethernet Phone
• Transmission Substitution
• Tie Line, Trunk, Loop
• Switching Alternatives
• PBX, CO, CENTREX

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Convergence

• Adding Voice, Video, Fax to Data Network
• Unified Messaging
• Centralized Communication Services
• Email, Telephony, Multi-media
• Common Protocol (IP)

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Voice To/From IP
Voice
Analog
CODEC Analog to Digital
Compress
Create Voice Datagram
Add Header (RTP, UDP, IP, etc)
Digital
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Voice To/From IP
Digital
Process Header
Re-sequence and Buffer Delay
Decompress
CODEC Digital to Analog
Analog
Voice
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Traditional Network Characteristics
Voice
Data

• Short Delay
• Constant Delay
• No Loss
• No Retransmission
• Direct Pass Through

• Low Error Rate
• Reasonable Delay
• Variable Delay
• Packet Loss
• Retransmission
• Uses protocols

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Voice Over Networks
VPN
An Intranet

• Inherited
• Environment
• No Goals
• No Guarantees

• Controlled
• Environment
• Performance Objectives
• Designed to perform

VPN Virtual Private Networks
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Voice Over Requirements

• Compression
• Reduced bps vs. Quality
• Silence Suppression
• Assumptions
• Signaling
• Functions
• Speed

• Echo Control
• Local
• Quality of Service (QoS)
• Toll quality
• Voice Enhancements
• Directory services
• Feature CLID, Call waiting

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Conclusion

• VoIP is a new technology that enables voice/fax
  to be delivered using IP.
• The driving force for the technology is to avoid
  long distance charges in PSTN.
• VoIP is becoming a hot topic in relation to
  voice/data integration.
• Because of the rapid growth of data network it is
  possible to have voice over IP
• An alternative to Public Switched Telephone
  Network.

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Conclusion, Cont.

• It offers Alliance exciting new added values like
  telephony distance learning, phone directories,
  voice web browsing, multicast conferencing.
• Internet-aware telephones are on the horizon.
• VoIP is a growing technology and very practical
  for medium and large companies and organizations.

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QUESTIONS?