The Second Edition of this handy and accessible guide has been greatly updated to encompass the many changes that have taken place in telecommunications, including the various forms of digital networks and their testing aspects.Troubleshooting Communications Facilities comprehensively covers all aspects of measurements and tests on data and telecommunications circuits, with an emphasis on practical troubleshooting of operating systems. It describes the correct analysis of frame errors, CRC errors, pattern, and other logic errors. The text also contains a greatly expanded fiber optic section that includes discussion of SONET line and section and path performance monitoring. Discussion of optical-loss test sets is also included, as is the use of Maximum Time Interval Error and Time Deviation of jitter and wander measurements are discussed. A new appendix covers buyers' guide type information on vendors and test measuring equipment, including vendor addresses, telephone numbers, email addresses, and Web site URLs. The text provides correlation between test procedures and types of test and measuring equipment to be used. ATM and MPLS are discussed as well. This book is an invaluable guide for technical professionals in the telecommunications industry.