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What is PRI & BRI?

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

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Question added by MOHIDEEN ABDUL CADER , SENIOR PROJECT ENGINEER , PKE GULF WLL
Date Posted: 2017/10/08
Jogesh Thandayan
by Jogesh Thandayan , Managing Director , Thinkit Technical Solutions FZCO

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.  

 

 

MICHAEL Hackett
by MICHAEL Hackett , Sr Consultant/Engineer , Infrastructure Architects Group, Ltd

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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