Making the migration over from PSTN to VoIP requires careful planning and checks to ensure a smooth and seamless transition. Although the migration process depends considerably on the size of your network, there are some basic guidelines to follow to help make the move as smooth as possible.
Ensure your current PBX support SIP
If your existing PBX supports Sip then you should provide the make and model number to your telecoms provider. They can verify the compatibility of the PBX with the SIP service. If your PBX doesn’t support SIP then you would need to purchase either a voice gateway, to connect the PBX with the SIP, or replace the whole PBX with a VoIP PBX.
Audit all lines and associated numbers
When migrating from a PSTN to VoIP, you will most likely move the existing numbers to a SIP provider (also known as local number portability). In this case, it is very important to ensure all company numbers are included in the migration. Failure to do this will result in a strong possibility of the numbers being cancelled by the PSTN provider.
Test, test and test again
It is strongly advised to move a single line across first – preferably a test number. This will provide you with the necessary time to test your new SIP provider and ensure the line quality meets the high standards your business warrants. Once the SIP line has been extensively tested, you can then safely proceed with moving all other lines across.
Parallel Installation if possible
If migrating to an IP PBX, it is advisable to move the new VoIP infrastructure parallel to the existing one. This isn’t always possible but using this strategy will allow more time for users to adapt to the new system and discover any possible problems or issues they may encounter. This tends to be where bottlenecks and high latency issues are found.