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Cisco CIT 642-831 - Serial Links


This course details how to troubleshoot serial links and the protocols used on serial links. Techniques for troubleshooting serial links, including CSU/DSU Loopback Testing and common serial link troubleshooting commands, are presented. In addition, the c

This lesson is part of our Cisco CIT 642-831 online training series which contains over 18 hours of self-paced courseware. Our web-based training provides 6 months of unlimited access.


After completing this course you will be able to:

  • Troubleshoot Frame Relay and X.25 problems
  • Troubleshoot serial link problems
  • Determine whether serial link problems are hardware or software issues
  • Perform a local or remote loopback test
  • Troubleshoot IOS serial link configuration issues
  • Use IOS commands that will aid in isolating problems


  • Serial Link Symptoms
  • Troubleshooting Techniques for Serial Link Problems
  • CSU/DSU Loopback Testing
  • Serial Link Troubleshooting Commands
  • Troubleshooting Frame Relay
  • Frame Relay Troubleshooting Commands
  • Troubleshooting X.25
  • X.25 Troubleshooting Commands

This course is for anyone who wants to get the most out of using Cisco CIT 642-831.

Prerequisites: None:

Technical Requirements:

  • Internet connection
  • Browser: Internet Explorer, FireFox, Chrome, Safari, Opera or any standards compliant browser.
  • Authorware and Macromedia Flash player recommended but not required.
  • JavaScript must be enabled.

Retake any or all of our computer training as often as you want. Our online tutorials allow you to learn anywhere, anytime from any computer with internet access. All courses allow for 6 months of unlimited access (1 user), includes a variety of features and all courses qualify for Continuing Education Unit credit.

StaffKit is an e-learning leader in providing computer training tutorials and online education. We have satisfied customers in over 75 countries using our online training courses. We have been a leading provider of self-paced web based training for the past 10 years.

Total Courses: 9
Total Time: 18+ hours
Only $99.95
Available in Package only
Total Courses: 853
Total Time: 1723+ hours
Only $249.95
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