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Firewall/Router Settings with Digitcom HostedPBX

Enable RTP-UDP (port range is 10,000-20,000).

  • Enable SIP-UDP/TCP port 5060.
  • Make sure that there is no SIP inspection/SIP transformations enabled depending on your firewall.
  • Turn off ALG (Application Layer Gateway).
  • To automatically instruct the phone with the provisioning URL you need to program ‘option 66′ on your DHCP server with the following address "".
  • Apply QOS on your firewall or router

    Firewalls with Known Issues

    Hitron CGN3 (Rogers):
    Compatibility: NOT Compatible
    Status: This router does not have the ability to disable SIP ALG and is not compatible with VoIP. This router will need to be replaced with a router that is compatible. If you check the Hitron web site they suggest it is possible to place a phone on the DMZ, but, this is not advisable as it will compromise the security of the phone.

    Cisco Routers (general)
    Compatibility: Compatible
    Status: Cisco is the most common router available. These routers may require some changes (see above).

    Motorola Surfboard
    Compatibility: Compatible after changes
    Recommendation: Disable SIP ALG and ensure appropriate firmware (see below)
    Status: The following changes (or checks) are required:
    1) Must be running firmware v3.3 or above
    2) Must disable SIP ALG