Historical
ANSI T1.231-1997
Digital Hierarchy - Layer 1 in-Service Digital Transmission Performance Monitoring
This standard provides performance monitoring functions and requirements applicable to Layer 1 digital transmission signals for the covered levels of the North American digital transmission hierarchy. This standard provides functional requirements to support maintenance and is not meant to be an equipment specification.
CONTENT PROVIDER
Alliance For Telecommunications Industry Solutions [atis]
Alliance For Telecommunications Industry Solutions [atis]