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NBX Group - your source for all 3Com phones.

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What Ports are used by the NBX?

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  • The IMAP4 protocol uses port 25 (SMTP) to send mail, but an IMAP4 server uses port 143 to listen for mail.
  • To allow IP telephones and Analog Line ports to download, open the following ports through the firewall: UDP 2093 - 2096.
  • To access NetSet remotely, open port 80.
  • To use ConneXtions use ports 1025 - 5000 for TCP traffic.
  • To use ConneXtions use ports 8000 - 8099 by default for UDP traffic.
  • Port 1720 is used to negotiate and must be preserved.
  • TCP ports 1040 through 1044 and UDP 2093 through 2096 for NBX behind firewalls.
  • TCP port 1040 (used for call setup)
  • NBX_CALL_CONTROL_UDP_PORT = 2093
  • NBX_AUDIO_UDP_PORT = 2094
  • NBX_INTER_NCP_SIGNALING_UDP_PORT = 2095
  • NBX_DIRECTORY_SERVICES_UDP_PORT = 2096