Premium Rate Services
http://www.safaricom.co.ke/index.php?id=1112
Premium Rate Services (PRS) also known as Third Party Content Services are services that provide recorded information or live conversation for callers. These services are usually channeled through sms short codes or special numbers leased by network operators to PRS providers.
Main Categories

Bulk SMS Business Messaging Solutions allow you to communicate quickly and directly with your target audience at an extremely affordable price. If you need to send out high volumes of text messages in one go e.g. running competitions and marketing campaigns, sending notifications to employees, notifying customers of deals, promotions and events etc, then the bulk SMS service is for you.

SMSs are received almost immediately by the recipient and can be read quickly, allowing for instant communication.

The result is an extremely cost effective and efficient, bi-directional communication tool that enables you to communicate with your customers and staff on an on-going basis.

Connection Process To provide the bulk SMS service, one has to be a licensed Premium Rate Service Provider or use the services of an existing Premium Rate Service Provider.
http://www.safaricom.co.ke/index.php?id=1112