This image is a graphical representation of the Oracle Voicemail & Fax hierarchy. It shows the Oracle Voicemail & Fax group at the top of the hierarchy. Below this is the PBX-Application Cluster level, below which is the Voicemail & Fax Application level. Beneath the Voicemail & Fax Application level are the 11 services that comprise the application. These services are the Telephony Monitor, Routing, Retrieval, Recording, Message Recovery, MWI, Call Transfer, IVR, Fax Receiving, and Message Delivery. Each service is connected to instances by the same name. This hierarchical relationship can be repeated multiple times beneath the Oracle Voicemail & Fax group.