HOW TO GUIDE: INEXPENSIVE INTERNET PROTOCOL TELEPHONY SOLUTION Created by: Cameron Adkisson Eastern Kentucky University

PURPOSE  Create a full IP phone system at a fraction of the cost  Intended audience is network managers for small or cost cutting companies. Even suitable for the weekend hobbyist who wants to learn VoIP systems.  I’ve made this project possible by implementing FreePBX server software which is an open-sourced Linux based software.

TECHNICAL JARGON  Voice over internet protocol (VoIP) – General term for phone service through the internet instead of public telephone lines  Session initiation protocol (SIP) – Protocol that is used to initiate and control multimedia communication  Private branch exchange (PBX) – Private telephone network used within your company or local network  Public switching telephone network (PSTN) or Plain old telephone service (POTS) – The phone network that connects landlines and cellphones all around the world  Power over Ethernet (PoE) – Technology that allows network cables to carry electrical power for connected devices

REQUIRED HARDWARE -content/uploads/2010/12/VOIP- Network-Diagram.png Server’s minimum requirements - 700Mhz Pentium III with 512M of RAM IP telephone – preferably SIP enabled but also can be MGCP, H.323 and IAX Router or Switch – Any type of modern switching hardware, power over Ethernet (POE) enabled to power the phones is a big plus PC - For configuration via web interfaces and also using the softphone application

FREEPBX SERVER SOFTWARE  FreePBX is a complete OS that includes software bundles to handle and configure all IP phone traffic. This OS is built on Linux and uses Asterisks as its PBX software.  Features a command line and web interface 

CORTELCO PHONE & X-LITE SOFTPHONE  Cortelco 2757 IP Phone = $17.50  Cheapest IP Phone I could find but surprising good quality and features  SIP enabled  Has web interface for remote configuration  X-LITE Softphone Application = Free  Uses SIP just like a regular IP desk phone  Even includes an instant messaging feature

BRIEF CONFIGURATION DETAILS  Set your router’s IP address to (AKA default gateway)  Set your router’s DHCP address to  When prompted for the IP address during the FreePBX install, set it to static  X-LITE account setup  User ID = extension  Domain = FreePBX IP address  Password = SIP Password set for that extension  Cortelco 2757  SIP Proxy Address = FreePBX IP address  SIP Proxy Port = 5060 (port that FreePBX uses)

FINAL PRODUCT 

FUTURE WORK  Subscribe to a internet service provider that is able to offer SIP and enable outbound and inbound calling  Implement numerous security features and such as a firewall like pfSense or Smoothwall  Connect more clients and phones to the network

REFERENCES  Asterisk & FreePBX Basic Admin Overview. (n.d.). Retrieved from  Mombrea, M. (2010, December 10). Setting up a small office or home office VOIP system with Asterisk PBX - Part 1 - Cypress North. Retrieved from small-office-or-home-office-voip-system-with-asterisk-pbx-part-1/  Eli the Computer Guy. (2011, February 17). Introduction to Telephone Systems. Retrieved from  Lewis, T. (2015, November 16). FreePBX Distro First Steps After Installation - PBX Platforms - Documentation. Retrieved from Installation  Cortleco Inc. (n.d.). Cortleco 2757 VoIP Phone Users Guide. Retrieved from