Working with ISPs / Internet Providers
AT&T / DSL / U-Verse
Required Settings: - Phones must use TCP instead of UDP - Disable SIP ALG - Disable IPv6
Frontier / Verizon Fios
Verizon Fios and Frontier use consumer-grade fiber optics to deliver services to their customers. Required Settings: - Disable SIP ALG (if possible). - Phones are highly recommended to use TCP instead of UDP. - If you have your own firewall, disable ...
Xfinity / Comcast
Xfinity/Comcast uses various cable modems to connect their customers to their internet services. They do allow their customers to purchase their own equipment. Good/Preferred Modems: - Netgear CM500 - Netgear CM600 - Netgear CM1000 - Arris SURFBoard ...
Spectrum / Time Warner Cable
Spectrum (formerly Time Warner Cable) uses various cable modems to connect their customers to their internet services. Good/Preferred Modems: - Arris DG1670 - Netgear CM500 - Netgear CM600 - Netgear CM1000 - Arris SURFBoard SB8200 - The new ...
Non-Approved Routers and Modems
This is an ongoing list of routers/modems known for their lack of VoIP reliability. If you would like to see a list of approved routers, please view the article called "Approved Routers / Quality of Service". Cisco RV Series These are not ...
Approved Routers / QoS Settings
The following Quality of Service values are used with all phones registered to the PrimeVOX infrastructure. All router models by these manufacturers are supported by our VoIP services. SIP Signaling: 26 / AF31 / 0x68 (UDP or TCP) RTP Audio: 46 / EF / ...