Primary Rate Interface
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Primary Rate Interface - (PRI) A type of ISDN connection. In North America and Japan, this consists of 24 channels, usually divided into 23 B channels and 1 D channel, and runs over the same physical interface as T1. Elsewhere the PRI has 31 user channels, usually divided into 30 B channels and 1 D channel and is based on the E1 interface.

PRI is typically used for connections such as one between a PBX (private branch exchange, a telephone exchange operated by the customer of a telephone company) and a CO (central office, of the telephone company) or IXC (inter exchange carrier, a long distance telephone company).

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No references found			They are also known as Basic Rate Access and Primary Rate Access. General Information About ISDN by John Grant / Computers and Internet community For a larger location, where services could also include PBX-CO circuits, voice-grade private lines and higher-speed data, the primary rate access will prove economical for as few as five to 10 lines, depending on the mix of services, the distance to the office and the type of transmission. The World's Entering the Era of the Integrated Services Digital ... by Gifford, W. / Communications News Cologne Chip, founded in 1994, develops and manufactures ISDN controller ICs for basic rate and primary rate access. OCP-IP Announces Six New Members by Business Wire			primary low primary magma primary management domain primary measuring element primary member primary meristem Primary Metal primary mineral primary optic axis primary orogeny primary partition Primary Party Organization primary phase primary phase region primary phloem primary photocurrent primary plasticizer primary pollutant primary porosity primary power cable primary producer Primary Production primary radar primary radiation primary rainbow Primary rate access Primary Rate Interface primary reference fuel primary refrigerant primary register primary relay primary reserve primary rocks primary root primary scattering Primary School primary sedimentary structure primary service area primary sewage sludge Primary Sex Characters primary skip zone primary standard primary storage primary stratification primary stratigraphic trap primary stress primary stress field primary structure primary subcontractor primary submodule primary succession			Primary Protection System Primary Proximal Gastric Cancer primary proximal RTA Primary Pserous Carcinoma of the Peritoneum Primary Pulmonary Arterial Hypertension Primary pulmonary hypertension Primary pulmonary hypertension primary pulmonary lobule primary purpura primary purpura primary purpura Primary Qualified Beneficiary Primary qualities Primary qualities of bodies Primary Quality Assurance Organization primary quill Primary quills primary radar Primary Radar Controlled Approach primary radiation primary radiation primary radiation primary radiation primary rainbow Primary Rainforest Primary Rainforest Primary Rat Kupffer Cells Primary Rate Primary Rate Primary Rate Primary rate access Primary Rate Card Primary rate interface Primary rate interface Primary Rate Interface Board Primary Rate ISDN OSI Office Facilities primary reaction Primary Reaction Control System Primary Reactor Coolant Pump Primary Reactor Coolant Pump Trip System primary receiving a primary receiving a primary receiving a primary receiving a primary receiving a Primary Reference Clock Primary Reference Fuel Primary Reference Fuel Primary Reference Receiver Primary Reference Source primary refrigerant primary register Primary reinforcement Primary reinforcement Primary reinforcement Primary reinforcement primary relationships primary relay primary renal azotemia primary renal azotemia primary renal azotemia

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Primary Rate Interface (redirected from Primary rate access)

Primary Rate Interface
(redirected from Primary rate access)