6 ms·the transmission medium is a voice callby 867-5309 7y agothe transmission medium is a voice callPiskvorrr 7y agoEven worse, if you're going IP-over-VoIP, the "physical" layer is pessimized for data transfer. I would assume worse performance than through PSTN.867-5309 7y agoindeed, but it serves as proof of concept / experimental, rather than practical application