Recommendation I.430 (11/1988): Basic user-network interface - Layer 1 specification
superseded recommendation/international standard from the International Telecommunication Union
ITU Telecommunication Standardization Sector
Basic user-network interface - Layer 1 specification
Recommendation G.117 (11/1988): Transmission aspects of unbalance about earth (definitions and methods)
Recommendation G.701 (11/1988): Vocabulary of digital transmission and multiplexing, and pulse code modulation (PCM) terms
Recommendation G.960 (11/1988): Digital section for ISDN basic rate access
Recommendation G.961 (11/1988): Digital transmission system on metallic local lines for ISDN basic rate access
Recommendation I.112 (11/1988): Vocabulary of terms for ISDNs