| 摘要 |
<p>Systems and methods of monitoring activity are provided. Activity at a subscriber location is determined using data which is accessible to a provider of a product or service to track the provision of the product or service to a subscriber at the subscriber location. The product or service may be provided to subscriber premises, such as utility products provided to a subscriber's home or office, or to equipment such as a mobile telephone which is associated with the subscriber.</p> |
