I have a customer with IP Office 403 with Voicemail Pro. I have Voicemail Pro running on a server. Does anyone know what network port(s) the IP Office uses to access the server? I'm having an issue where voicemail isn't working and the SysMonitor shows error "No Free Voicemail Ports." I think it's a firewall issue and I want to have the network administrator open up the port(s). Thanks.