Low Voip I Use Skype And It Runs Sloppy At 5k Down And 2 K Up, Is There A Better VOIP At Such Low Speed?

I use Skype and it runs sloppy at 5k down and 2 K up, is there a better VOIP at such low speed? - low voip

1 / 2 weeks I am using a cable modem and a high bandwidth, the other half of the week I am making available through a DSL router public. I want to block when it comes to calls. My speed 3 to 5 km, and it is not bad, but my speed is what kills my conversations. I hear, but they struggle to do what I say. Is there a better compression VoIP or somthing in that direction?