VigorBX 2000 - Changing SIP Ports

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The Voice over IP protocol SIP (Session Initiation Protocol) is typically used on UDP port 5060 to control the initiation and handling of SIP based VoIP calls both internally and received or made through the ITSP (Internet Telephony Service Provider).

The audio of a call is sent in a separate UDP packet stream on a port that is arranged when the session is initiated via SIP, this uses RTP (Real-time Transport Protocol).

The DrayTek VigorBX 2000 PBX system has SIP port configuration options both for SIP handset registration and for individual SIP trunks:

  • SIP Registration service, which manages the registration and call handling of SIP Extensions / Phones that are registered with the PBX, uses UDP port 5060 in the default configuration.
  • SIP Trunk service ports are separate by default, each SIP Trunk sends outbound SIP packets on UDP port 5060 and listens for SIP packets on UDP port 5070.

Some ITSPs may require that the PBX system listens for SIP Trunk traffic on UDP 5060, which would conflict with the PBX system's SIP Registration port.
To resolve this, either notify the ITSP that their system must send SIP packets to UDP 5070, or if that's not possible, change the PBX system's SIP Registration port and the SIP Trunk listening port.

Please Note that changing the VigorBX 2000's SIP Registration port will require changing the SIP port that each SIP handset is registering with the PBX system on, from the default of UDP 5060 to the new port number.

SIP Registration Port

To set the port that SIP extensions register with, either locally or remotely, go to [IP PBX] > [PBX System] > [SIP Proxy Setting]:

On that page, set the SIP Local Port to the required value:

Click OK to apply this setting and the IP PBX will ask to restart. Click OK to restart the PBX system and when the VigorBX 2000 is back online, it will be using the configured SIP port for extension registrations.

Once this setting has been changed, it will be necessary to change the SIP port that extensions register with.

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