Port forward all outside traffic coming in on port-5060 (UDP/TCP) to the IP address of the IP office.
- Please ensure that only Digitcom’s IP Subnets 184.108.40.206/24 and 220.127.116.11/24 are port forwarded on your firewall to your IP Office to prevent unauthorized access from any other internet IP addresses.
- Please open RTP ports for audio. Please note, default IP Office ports should be 46,750 – 50,750. Otherwise, check your PBX for audio ports.
- Please make sure that there is no SIP inspection/SIP Transformations enabled depending on your firewall.
- Please turn off ALG (Application Layer Gateway).
For more information about Firewall settings and SIP, Please visit this page: Routers SIP ALG.