primary rate interface (PRI)

primary rate interface (PRI): An integrated services digital network (ISDN) interface standard (a) that is designated in North America as having a 23B+D channels, (b) in which all circuit-switched B channels operate at 64 kb/s, and (c) in which the D channel also operates at 64 kb/s. Note: The PRI combination of channels results in a digital signal 1 (T1) interface at the network boundary.

This HTML version of FS-1037C was last generated on Fri Aug 23 00:22:38 MDT 1996