Includes synchronization interface standards for digital networks. Describes and specifies type of digital network interfaces carrying synchronization references and synchronization performance specifications for DS1 and SONET optical carrier (OC-N) references at network interfaces. This standard was first listed for public review in the March 26, 1999 issue of Standards Action. It is being resubmitted due to substantive changes.To obtain an electronic draft: URL Address: ftp://ftp.t1.org/pub/ansi/bsr8/lb736-d.pdf