In reply to Postmanpat:
I would check a few other things as in my experience Skype is very reliable. If you're just using it as a phone line, perhaps its the conference bridge you're dialing into that isn't great.
I spend about 6 hours a day on conference calls (I'm on one, with video right now with London, Warsaw and Berlin) and my company uses a corporate-tailored version of Bluejeans. The beauty is that it's all web-based and no plugins to download (although there's a phone app which works well but kills the battery).
It's really easy to start a conference and I've got my own bridge number (as has everyone) which I can dial straight into without having to 'set up' a conference. It has international dial in numbers so I can call in from the phone if I'm in the car for instance. Lots of good features but I've no idea of the cost or whether you're looking for something for business or personal use.
The document sharing features and multiple video feed features work quite well.