these are the ports.
Phone Manager uses the following IP ports for communication with the IP Office. If a firewall is placed between the user PC and the IP Office, traffic on these ports should be allowed.
• Port 69 on the IP Office and the Phone Manager PC- TFTP
This is used by the Phone Manager to obtain data from the IP Office such as user name lists and the switch directory. TFTP is also used during the application log on.
• Port 50796 on the IP Office - IPO PC Partner
This port is used by Phone Manager and Soft Console applications to establish communication with the IP Office for call signalling, configuration changes, etc.
• Port 50799 on the Phone Manager PC - IPO BLF Updates
Used by Phone Manager to receive status updates for internal speed dial icons. These are sent from the IP Office using the 255.255.255.255 broadcast address.
• VoIP
Phone Manager Pro PC Softphone uses ports 1719 and 1720 for H323 Gatekeeper discover and then a range of ports for VoIP. Therefore, we can only recommend Phone Manager Pro PC Softphone operation across a firewall when using VPN to tunnel the connection.
See what my brain does when it's not thinking about phones.