1. E.g., ORIEL Corporation products (Stratford, Connecticut)
2. E.g., Spectra-Physics, Inc.
3. “Ohio Bell Lights Up FO Trouble Spots,”;Aulicino;Telephony,1986
4. “Photon Probe - An Optical-Fiber Time-Domain Reflectometer,”;Personick;Bell System Technical Journal,1977
5. “Optical Time Domain Reflectometer for Single-Mode Fibers,”;Horiguchi;Transactions of the Institute of Electronics and Communication Engineers, Japanese Sect. E.,1984