標準號：ANSI/TIA-664-503-B-2007
中文標準名稱：無線特征描述.隱含呼叫前轉(CFD)
英文標準名稱：Wireless Features Description: Call Forwarding - Default (CFD)
標準類型：M19
發布日期：1999/12/31 12:00:00
實施日期：1999/12/31 12:00:00
中國標準分類號：M19
國際標準分類號：33.070.50
適用范圍：Call Forwarding - Default (CFD) permits a called subscriber to send incoming calls addressed to the called subscriber's Directory Number to the subscriber's designated voice mailbox or to another Directory Number (forward-to number), when the subscriber is engaged in a call, does not respond to paging, does not answer the call within a specified period after being alerted or is otherwise inaccessible (including no paging response, the subscriber's location is not known, the subscriber is reported as inactive, Call Delivery not active for a roaming subscriber, Do Not Disturb active, etc).