A customer brings you a previously completed site survey for the initial wireless implementation from 12 months ago. The customer currently has six access points deployed in the warehouse. The survey shows that the
installed coverage provides for a 15-percent overlap between cells at 5.5 Mbps, and a 5-percent overlap at 11 Mbps. This solution has proved to provide adequate coverage and roaming capabilities for the data applications.Why would this site survey not be adequate for a VoIP application?