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Originally Posted by Bifta
Currently VoIP quality is complete sh*t, not sure why .. it just is, dialpad used to be one of the best providers but it's impossible to hold a conversation with people and the calls are not that cheap anymore. However, if you want to hold high quality conversations between other PC users, try SkyPE, better quality than any phone, currently only works to other SkyPE users though.
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VoIP is a bit pants over the internet and thats due to the way that the internet is run. Currently all forms of data, whether that be voice, video or normal data is handled the same way, and no one protocol or service is given priority over the other. This then means that the internet, or more specifically the path from the A Party to the B Party has to have enough bandwidth to handle all the traffic and quickly otherwise you will get excessive delay or dropped packets.
In order to ensure good transmission of voice, the internet would need to be QOS (quality of service) enabled in order to ensure that voice takes priority over everything else and thats not going to happen soon.
Sometimes you end up missing words or parts of words, usually because the information has been lost or more likely arrived too late. Think about it - if your talking to someone and a packet of "speech" gets sent via a different router it may arrive sooner or later than the preceding one, if its much later the packet is dropped and a gap in the speech is heard, otherwise you would hear words all mixed up and sentences in the wrong order.
Any delay above 150ms between the A and B party is noticeable too, which can cause long pauses between sentences and have people speaking over each other - and then theres echo...
Anyhoo, I'm boring you now...
lets just say its going to be a while before speech on the net becomes viable.