We were skeptical when we first heard of voice over frame relay. It is one thing to hear the miracle of dial tone over frame relay at a trade show, but it is quite another to trust your voice traffic on a real network.
Several vendors insist it is.
To view the Report card. Nuera Networks and Memotec, two players in voice over frame relay, were regrettably absent from our testing. And though Memotec elected to participate and met our testing criteria, we were unable to resolve technical difficulties in time for our tests. Because all of the FRADs tested support these standards, we eliminated the PBX as a variable in our test infrastructure and connected our analog telephone lines directly to the voice ports of each unit. Data performance is easy to test, but sound quality is largely a matter of perception.