Is it difficult to change over from an old PSTN PABX to a VoIP enabled one?
Migrating from an old PSTN type PABX to a VoIP PABX should not be of a problem. If you will be using a software based VOIP enabled PABX, you can simply setup the new PABX and use already installed network cabling for the phones. Once all is setup, you can simply switch off the old PABX. Support departments of software companies who develop software based IP PABX’s, usually help you and support you with the changeover, so you can be able to finalize the change over as smooth as possible without any downtime, if possible.