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What is the difference between BRI and PRI Port?

Asked by: Interview Candidate | Asked on: Sep 6th, 2006
Showing Answers 1 - 10 of 10 Answers

Answered On : Sep 9th, 2006

View all answers by aghumade

i want answer

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Answered On : Sep 12th, 2006

BRI PORT -2B Chan1D Chan(Basic rate Interface)


         1D ----16Kbps

PRI Port----24Bchan 1D chan(primary rate Interface)


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D. Vignesh

Answered On : Sep 25th, 2006

Both BRI (Basic Rate Interface) and PRI (Primary Rate Interface) provide multiple digital bearer channels over which temporary connections can be made and data can be sent.


ISDN BRI services 2 B channels (64 kbps) and one D channel (16 kbps). The total bandwidth is 144 kbps.

In North America ISDN PRI service is PRI T1 total bandwidth 1.544 Mbps ( 23 B channel with 64 kbps + 1 D channel with 64 Kbps)

In Europe  ISDN PRI service is PRI E1 total bandwidth 2.048 Mbps (30 B channel with 64 kbps + 1 D channel with 64 Kbps)

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Answered On : Jan 22nd, 2007


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Kurt Cobain

Answered On : Feb 9th, 2007

View all answers by Kurt Cobain

BRI ( Basic Rate Interface) 2B+1D i.e 2 bearer channels of 64 kbit/s and 1 data channel of 16 kbits/s . The B channels are used for voice or user data, and the D channel is used for any combination of: data, control/signalling and X.25 packet networking. The two B channels can be bonded together giving a total data rate of 128 kbit/s. BRI is the kind of ISDN interface most likely to be found in residential service.PRI (Primary Rate Interface) This type of interface carries multiple number of voice and data transmission (T1 23B +1D) & (E1 - 30B+1D). These are geographically divided as in T! is used in North America and Japan wheares Europe, Australia andrest of the world uses E1. More higher capacities are available in the form of T3 & E3.So the basic difference between BRI & TRI in simpler terms is for usage as in residential connections use BRIs and medium to large scale enterprises use PRI.

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Answered On : Feb 7th, 2008

View all answers by sutheeshcb

2 and 32 channel

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Answered On : Jul 18th, 2008

View all answers by Cybergeek004

ISDN comes in two speeds BRI and PRI, BRI has a max bandwidth of 128k over two 64K B channels. PRI has a maximum or 1.544 Mbps over 23 channels each of which support 64k

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Answered On : Jan 23rd, 2009

View all answers by brijesh_p2003

Basic rate interface, it is a only two channel of 64 kbps, BRI using only video conference system,

PRI.... primary rate interface its is a 30 channel,

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Answered On : Jul 30th, 2009

View all answers by priyakalai

PRI: Expensive
BRI: Less cost
PRI: Large scale service suitable for companies
BRI: Small service suitable for home and small business

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Richard Cooper

Answered On : Oct 11th, 2012

View all answers by Richard Cooper

I think there is one significant difference: PRI provides greater bandwidth. That is why it is usedwith telephone systems, like Ozeki Phone System XE. I was thinkin about to use this telephone system, Ive read a lot of good things about it.
I provide you a page where you can get more info on PRI. I really hope it helps.

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