I b
Ib: The 4-wire (2-pair) bidirectional primary rate (PR) interface point on the user side of the termination equipment (i.e., NT1 and NT2), including the equipment connecting cord or equivalent on the network side of the interface cable. [T1.408-1990]
This HTML version of Telecom Glossary 2K was last generated on Wed May 8 15:36:48 DT 2002.