Wholesale: Products & Services


Course Description

This self-directed, web-based course provides you with knowledge of the CenturyLink™ Integrated Services Digital Network (ISDN) Primary Rate Service (PRS) product. You will learn how ISDN PRS, also referred to as ISDN Primary Rate Interface (PRI), works and about all the options available.

Primary Rate Service is a digital service offering which provides a four-wire, full duplex transmission path (DS1) between ISDN compatible Customer Premise Equipment (CPE) and an ISDN-equipped CenturyLink central office (CO). It provides a T-1 service that is multiplexed in the central office down to 24 channels.

For information about creating and submitting a service request, please review the Wholesale ASR Private Line training.

Course Objectives

Upon completion of this training course, you will be able to:

  • Explain what ISDN-PRS is and how it works
  • Describe the components and features of ISDN-PRS
  • Determine configurations and options
  • Determine compatibility of Customer Premise Equipment
  • Describe the benefits of ISDN-PRS



The target audience for the training is primarily CLECs and External Customers, but the training is available to anyone that would like an overview of the subject. We believe this training will assist you in gaining a better understanding of the product and processes, and will allow you to be more effective in working with the CenturyLink Sales and Service Team.

Course Length

This course takes approximately 3 hours to complete.

Course Registration