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INTEGRATED SERVICES DIGITAL NETWORKS (ISDN), CHANNEL-ASSOCIATED SIGNALING (CAS)
Primary Rate Interface (PRI)
Primary Rate Interface (PRI)
Introduction
Primary Rate Interface (PRI) is an ISDN interface to primary rate access. Primary rate access consists of a single 64-kbps D channel plus 23 (T1) or 30 (E1) B channels for voice or data.
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