voip呼叫是否安全？
yes. the protocols that power voip calls establish high-grade security in each of your business’s calls.
团结专门为smbs设计，意思是在100-900名员工的任何地方的企业。 
it has had particular success in the following industries: architecture/engineering, manufacturing, it, healthcare, legal and financial.
it’s especially ideal for those that need a high level of customer support and training.  
请注意，它还提供经销商程序。