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PRI is Primary Rate Interference. Which is havingB+2D. B is Bearear signal have kbps and D is common supportive signal with Kbps. Totaly nearly2GB speed of voice, Data communication in ISDN network taking Place.
BRI. is Basic Rate Interference. Which is a low speed and having2B+D
These are ISDN (Intergrated Services Digital Network) interfaces. ISDN is a circuit switch network based system.
Basic Rate Interface (BRI), which consists of two 'B channels', each with bandwidth of 64 kbps, and one 'D channel' with a bandwidth of 16 kbps. Together these three channels can be designated as 2B+D.
Primary Rate Interface (PRI) - ETSI standard contains 30 B channels, 1 D channel of 64 kbps and 164 kbps channel for timing and alarm. Total capacity of PRI is 2Mbps.
North American Standard for PRI is 23B+D 1.544Mbps.
These are old ISDN specs.
BRI - Basic Rate Interface with @ channels 128Kbps
PRI - Privatre Rate Interface = 2.94Mbps with Dual s
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