Our consultancy has just taken over management of IT services for a company who uses RingCentral. Our client has three geographical locations, with 6 SIP phones at one site, three at another, and one at the last location. The three offices operate within the context of a VPN. There is no reason for a VPN, other than the last consultant advising RingCentral requires a VPN for its phone network to operate satisfactorily. Since this is a cloud-based service, this surprises us. Bearing in mind our customer has your basic product offering (about 20-25+/- per month), is there a reason why our clients would enhance their service by using a VPN?