Figure 20 shows an entry in the Contact list. The contact is assigned to a specific Site with the expected contact information. There are two points of interest in this record. The Photo URI for the photo.png file is stored in the Extension Manager File Store, as identified by the em:// prefix. The ringtone in this example specifies a standard Android ringtone. Custom ringtones can be assigned using the same import process used for the photo. The customer administrator can create a ringtone, upload it to the Extension Manager File Store, and reference it using the em:// prefix.