Already you will have seen fields when adding units onto the system for recording subscription details (see Mobile Device Fields). When the Subscription Type field is set to 'Paid Subs' or 'Trial' the rest of the subscription fields are used in conjunction with the billing run that is usually performed at the end of each month.
When a billing run is performed, a procedure is run against the database to produce a report of devices that will need to billed for the following month, for example if a billing run is performed at the end of July, only devices that are to be billed at the start of August will be picked up in the billing run. The report that is generated is then used to produce billing statements on a per customer basis, itemising the devices to be billed along with a total. The report will include 'Billing References' that are automatically assigned to each new statement, and are used in the Statements page of the extranet.
The Billing sub menu provides the following functionality:
To access these Billing functions simply expand the 'Billing' sub menu by clicking the 
button, this reveals the sub menu items within the Billing sub menu as shown in the image below:
Billing Menu Expanded