Enterprise communications audits are also called voice audits,[15] but the term is increasingly deprecated as communications infrastructure increasingly becomes data-oriented and data-dependent. The term "telephony audit"[16] is also deprecated because modern communications infrastructure, especially when dealing with customers, is omni-channel, where interaction takes place across multiple channels, not just over the telephone.[17] One of the key issues that plagues enterprise communication audits is the lack of industry-defined or government-approved standards.