reply to potato
Re: My VoIP Service Provider Requirements - Recommendations? Anveo has three PoPs: sip.anveo.com, sip.de.anveo.com, and sip.ca.anveo.com.
Ping will help you to diagnose poor internet routing between you and your service provider's PoP. Look at your ping times and see if they're all around the same number. If you see a variation in ping times such as 80, 85, 90, 80, that is known as jitter and can probably be handled by the jitter buffer in your VoIP hardware. If you see 40, 60, 20, 250, 375, 250, you have severe jitter and are probably going to experience poor audio quality due to packets arriving at their destination out of order.
Since ping only measures the latency between you and your service provider's PoP, it cannot diagnose audio quality issues that are not related to your internet routing. But between you and your service provider is the place most likely for audio quality issues to arise.
As for latency, 55ms round trip is quite good, but keep in mind that there is no way to measure the latency between a service provider and their carrier. However, 55ms leaves you lots of room for additional latency introduced by normal call routing or things like cell phones.
The bottom line is that though ping is a good first step, your ear is the best test.