ANSI T1.646-1995

Broadband ISDN - Physical Layer Specification for User-Network Interfaces Including DS1/ATM (Supercedes ANSI T1.624-1993)

This standard provides physical layer specifications for optical and electrical signals appearing at customer installation interfaces and the network interface (NI) for broadband (rates above DS1) and wideband (DS1) access to a broadband integrated services digital network (B-ISDN). This standard provides interface compatibility information and is not intended to be an equipment specification. This B-ISDN user-network interface (UNI) document supersedes American National Standard for Telecommunications - Broadband ISDN User-Network Interfaces - Rates and formats specifications, ANSI T1.624-1993, which only specified UNI rates and formats. The contents of ANSI T1.624 and additional physical layer specifications have been incorporated in this document to provide a singular B-ISDN UNI standard.