Transcript Basics of IP Telephonyx
Basics of IP Telephony
Sam Lutgring Director of Informational Technology Services Calhoun Intermediate School District
What are we here to talk about?
Central Office
Evolution of Communications
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
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
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
Basics of a PBX
Establishing and maintaining connection (call) between end devices All the call features – Conferencing – IVR – Transfer – Call pick-up
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)
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
What is VoIP?
Three Common Types – Geek-to-Geek – Gateway/Switch-to-PSTN – PSTN-to-PSTN
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
Why is it Catching On?
Flexible IP address assignment Increased system redundancy Backup consolidation Customized end user experience Cost (in some cases)
What is the Future?
Cell Phone IP Network PDA WIFI (Soft Phone) WIFI Gateway Video IP PBX IP Phone
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
QUESTIONS?
www.voip-info.org