I'm researching VOIP solutions for our company's two locations (50 users + 50 users) connected via WAN link.
1. What are the top 3 or 4 providers of cloud VOIP I should investigate and consider?
2. Broadview Networks boasts they use their " own unique technology and SilNet™, instead of SIP or open source". Is that a good thing or a bad thing?
3. Any good independent places to get up to speed on cloud VOIP?