Cisco 4-Port ISDN-BRI Network Module

Unanswered Question
Dec 7th, 2008

Cisco 4-Port ISDN-BRI Network Module

what does the BRI mean?

I have this module in a 2600 series router. Can it be used for basic LAN connection (like a hub)?

I have this problem too.
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scottmac Mon, 12/08/2008 - 06:31

First, to answer your question: No, you cannot.

ISDN is a Telco technology and protocol suite.

"BRI" stands for "Basic Rate Interface," also described as "2B+D" for two Bearer channels and a "D" channel, which is used for control signaling in some configurations, and additional bandwidth in others.

Max throughput is either 128K (2 X 56K or 64Kbps per channel) or 144Kbps (2B+16K that may be available in the D channel depending on your config.

ISDN requires an intermediate telco-style switch between the clients and can't be used back-to-back directly.

Good Luck


Richard Burts Mon, 12/08/2008 - 15:04


To supplement the good answer from Scott, you ask:"Can it be used for basic LAN connection". Scott correctly responds that it can not. This is because BRI (and ISDN in general) is a WAN technology and not a LAN technology.




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