basics of ip telephony sam lutgring director of informational technology services calhoun...
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Basics of IP Telephony
Sam LutgringDirector of Informational Technology Services
Calhoun Intermediate School District
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What are we here to talk about?
VoIPIP PBX
PoE
Converged Networks
Telepresence
VoIP Gateway Central Office
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Evolution of Communications
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Basic Terminology (1 of 3)
PSTN – Public Switched Telephone Network PBX – Private Branch Exchange CO - Central Office Centrex or Hosted/Virtual PBX POTS – Plain Old Telephone Service FXO - Foreign Exchange Office FXS - Foreign exchange Station Channel Bank
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Basic Terminology (2 of 3)
Digital Circuit T1 – Digital Network Interface PRI – Primary Rate Interface IP - Internet Protocol Convergence or multiservice networking Unified Messaging VoIP – Voice Over Internet Protocol VoIP PBX
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Basic Terminology (3 of 3)
VoIP Gateway VoIP Service provider SIP - Session Initiation Protocol CODEC G.711 ulaw IVR – Integrated Voice Response PoE – Power Over Ethernet
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Basics of a PBX
Establishing and maintaining connection (call) between end devices
All the call features– Conferencing– IVR– Transfer– Call pick-up
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What is VoIP?
Voice Over Internet Protocol– Allows voice to become simply another piece of
data (packet) riding the network– Takes advantage of existing data networks by
combining components of data and voice networks
– Transports voice packets using Internet Protocol (IP)
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What is VoIP?
Both a technology and a service– The technology is Internet Protocol (IP) allowing
the packets to be transferred across the data network
– The service is the voice portion, allowing voice to be transferred across the network
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What is VoIP?
Three Common Types– Geek-to-Geek – Gateway/Switch-to-PSTN– PSTN-to-PSTN
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Why is it Catching On?
Integration and application management One physical layer one infrastructure
(single wiring closet)– Simpler and less expensive to install and
maintain– Leverage common data network and
equipment Simplification
– Single network management system– Moves, adds, and changes for phones– Deployments
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Why is it Catching On?
Flexible IP address assignment Increased system redundancy Backup consolidation Customized end user experience Cost (in some cases)
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What is the Future?
WIFIGateway
IP PhoneIP PBX
FaxGateway
SmartPhone
Video
`
DesktopLaptop
(Soft Phone)IP Network
PDAWIFI
CellPhone
A3sip:[email protected]
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What do I need to know?
Requires a robust data network Network outages/issues impact voice
network Redundancy/Failover Emergency Services Connecting to traditional phone services Voicemail/e-mail integration
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QUESTIONS?www.voip-info.org