This router runs the same firmware that the Arris DG860A router uses and the configuration is the same.
While this device does have the ability to turn off SIP/ALG and DNS Proxy, recent testing has shown that this does not resolve the overall issue.
This device lacks the ability to maintain UDP session integrity and therefore cause general call quality issues.
Since this device is also managed by the Internet Service Provider, neither the customer nor VoIP provider are made aware of ISP changes.
If this device is reset by the Internet Service Provider, original issues will return.
In light of the above issues, it is therefore recommended that these devices be bridged to a recommended router.