About John L. White Expertise I can explain telecommunications concepts and terms and offer practical suggestions for deployment of systems. I have over fourteen years experience in designing voice and data networks for corporate customers.
Experience My company, Salient Networks, is based in San Diego, CA. We provide consultation, project design, and implementation of complex voice and data networks. We are a preferred solutions vendor for Avaya Communication, formerly the enterprise networking division of Lucent Technologies.
Expert: John L. White Date: 7/12/2001 Subject: T1 screened cable
Question Hi
What is the maximum specified distance for a screened twisted pair cable when transporting T1(GR303)at 1.5Mbit/s?
Is unscreened cable the same?
Thank you
Answer You must mean shielded twisted pair? I asked our cable expert, and he said that 100 meters (327 feet) is the standard length for copper wire. There would be limited applications for shielded over unshielded, for example elevator equipment, transformers, uninterrupted power supply. The same standards apply for shielded versus unshielded. For data transmission, if a longer run is required, optical fiber might be run up to the building, with copper completing the run. The recommended lengths for various conductive media are published in the TIA/EIA 568-A publication of 1995. This stands for Electrical Industry Association/Telecom Industry Association. Thanks for asking, as I learned something, too. –John White.
