Historical
ANSI T1.117-1991 (R1997)
Digital Hierarchy Optical Interface Specifications (Short Reach)
The purpose of this standard is to establish optical parameter specifications optimized for a short reach optical transmission interface. This standard complements ANSI T1.105-1988 and T1.106-1988 by providing optical parameters specifications optimized for the shorter distances between network elements, such as may be found in an intrabuilding environment.
Alliance For Telecommunications Industry Solutions [atis]