primary rate interface
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English[edit]
Noun[edit]
primary rate interface (plural primary rate interfaces)
- (telecommunications) an ISDN service delivered over T1, E1 or J1 datalines, with delivery of connections between 1472 kilobits per second and 1984 kilobits per second (kibibits)
Usage notes[edit]
In Europe, the PRI is delivered via E1 lines (2048 kb/s capacity), with 30 B-channels and 1 D-channel, all of 64kb/s, giving a payload rate of 1984 kb/s and a service rate of 1920 kb/s.
In North America, PRI is delivered via T1 lines using DS-1 signalling (1536 kbs capacity), with 23 B-channels and 1 D-channel, all of 64kbps, giving a payload rate of 1536 kbps and a service rate of 1472 kbps.
In Japan, PRI is delivered via J1 lines, with the same characteristics as North American lines.
Synonyms[edit]
- PRI (abbreviation)
Coordinate terms[edit]
- basic rate interface, BRI
- integrated services digital network, ISDN
- non-facility associated Ssgnalling, NFAS
Translations[edit]
Translations
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