TCP ports used by AlphaPro
From Zenitel Wiki
Depending on server type (AlphaCom or ICX) and the AlphaPro version, AlphaPro is using different TCP ports when communicating with the server.
ICX-AlphaCom server
AlphaPro settings
When using AlphaPro to configure an ICX-AlphaCom system, make sure that Node Type is set to "ICX" in Exchange & System > System: