The following script will create a new phonebook entry in Swyx. You’ll need the IpPbx PowerShell modules installed first. Oh, and be sure to replace [servername] with, well, the name of your server.

Import-Module IpPbx
Connect-IpPbx [servername]
New-IpPbxPhonebookEntry -Name "NAMEHERE" -Number "NUMBERHEREWITHPAPREFIX" -Description "POWERSHELL IMPORT" | Add-IpPbxPhonebookEntry