LevelOne SIP IP PBX VOI-9300 - Manual (Page 60)

2007-11-21 60 6
9. Applications
Applications of IP PBX under Firewall with DMZ
This will protect corporate network security while allowing VOI-9300 to work as IP-PBX for VoIP
applications. When VOI-9300 IP-PBX is operating under the corporate firewall, remember to
enable and open the following service port numbers for VoIP applications.
TCP Port：22, 80, 1723 for Telnet, Http, and PPTP.
UDP Port：5060, 1194, 10000-20000 for SIP, OPENVPN, and Voice RTP Range.