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PBX to VoIP Migration Checklist

By Benjamin Post


An old technology T1 Internet connection can support a PBX and provide broadband for office use. At a speed of 1.5 Mbps up and down, it was a considerable improvement over Dialup and early DSL offerings, which were problematic in their ability to support voice.  Many Telephony firms seized on the opportunity by selling T1 connectivity and PBX services together in three year packages to areas without other high speed alternatives.


For about $700 per month, a small business could now get T1, PBX, handsets, and phone service. However, when you compare even that cost to a VoIP installation, fully amortized over three years, then virtually any business can save thousands of dollars with a faster and more flexible solution.  Of course, getting out of an existing T1/PBX contract isn’t easy so the end of contract is a good time to consider replacing an IT/PBX solution with lower cost VoIP solutions.


Even if you’re still in an IT/PBX contract, however, planning ahead can amount to substantial savings and better overall voice and data services when you’re ready to make the switch.  Here is a short checklist to get you started and finally make the migration to a VoIP alternative:


  1. Get quotes for ADSL2 and Cable broadband connections
  2. Order and switch to new broadband connection with single Network Address Translation (NAT)
  3. Test new broadband connection allocated for each concurrent voice line
  4. If necessary, separate VoIP and data with a firewall VLAN of separate circuits
  5. Order VoIP in advance of old service expiration
  6. Call forward number to VoIP service
  7. Plan the switch-over and number porting before expiration of the contract
  8. Terminate the old service within the termination period (often a narrow window)


As you can see, a migration form T1/PBX to VoIP does take some planning and IT support but the savings are worth it.  If IT support is an issue then there are many well-experienced consultants and firms who can guide you through the process.  Perhaps the most important thing when it comes to installing VoIP is planning well ahead with plenty of time for testing and porting of the old phone numbers.  



About the Author:

Benjamin Post of POST TECH is an IT consultant with over 20 years of experience in supporting small and medium size firm with IT strategies and implementation planning and rollout. Ben holds a BS in engineering from Alfred University and an MBA from The University of Tennessee. Employment history, US Army - 1LT, Aladdin Industries - Process Engineer, Pelikan - Product Development Manager, Pilot- GM, Ribbon Equipment Manufacturing (REM) - VP Marketing, Simplified Software - Sales, POST-TECH - President.