"FOREWORD This Telecommunications Systems Bulletin (TSB) is published to assist the users of TIA/EIA Fiber Optic Test Procedures (FOTPs) to identify appropriate test procedure references in the most expeditious manner. It also serves to identify the publication status of the various documents as of the publication date of TSB63. For document prices and ordering information@ the user is referred to the latest edition of the annual ""Catalog of EIA and JEDEC Standards and Engineering Publications@"" published in the spring of each year by EIA. Since TSB63 is not revised on the same schedule as the catalog@ there may be documents listed here that are not listed in the EIA catalog@ or there may be documents listed in the catalog that do not appear here@ depending upon the relative publication dates. (Refer to EIA Publications Department for prices of affected documents.) Suggestions for improving this publication (or for improving any of the documents referenced in this publication) are always welcome and may be submitted directly to TIA@ marked for the attention of the ""Director - Fiber Optics."""