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 The following check list offers some general settings that apply to most routers. These settings should create an optimal environment for VoIP interoperability. 

** DISABLE SIP ALG **

- Disable Application Layer Gateway (AKA – “SIP Awareness”) 

- Set UDP window timeout to 60 seconds

- Disable STUN, ICE or any other local NAT traversal settings 

- Enable QoS for local devices. By IP address , By MAC address, By VLAN ID 

- Enable Bandwidth QoS (if available) 

- Set the upload speed of the internet connection. 

  Router will prioritize based on the available bandwidth. 

Firewall Requirements

If you have a firewall on a customer's site, you need to ensure that the below IP range and ports are open so our servers can properly communicate with the devices:

VoIP Traffic

IP Range:  162.252.248.0/22

Port Ranges:  5060, 7000, and 16384 - 32768

Transport Protocol:  Both UDP and TCP

Provisioning Server

Server IP: 23.253.155.189 

Port Ranges:  21, 22, 69 (FTP and TFTP)

Transport Protocol: TCP

HTTPS Fax Solution (AudioCodes ATA)

Server IP: 104.239.177.119 

Port Ranges: 443, 50, 51, and 52

Transport Protocol: TCP

If your router is connected to broadband MODEM supplied by your internet service provider, it is possible that some or all of the above settings should be set within the supplied device as many Modems act as firewall/router devices .