Speaking of evil test creators, the one I've always wondered about is actual
T1/DS1 throughput. I believe serial lines are full duplex. So NOW what is
the REAL bit rate? ;->
Chuck
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of
Brian
Sent: Saturday, October 28, 2000 4:52 PM
To: Patrick Bass
Cc: [EMAIL PROTECTED]
Subject: Re: total bit rate for BRI
On Sat, 28 Oct 2000, Patrick Bass wrote:
> In Cisco internetworking Technology Overview it states...
>
> "BRI also provides for framing control and other overhead, brining its
> total bit rate to 192 kbps."
>
> In Cisco Internetwork Design it states...
>
> "The D channel signaling protocol comprises Layers 1 through 3 of the OSI
> reference model, brining its total bit rate to 144 kbps."
>
> If I'm taking a Cisco certification exam and the question is "What is the
> total bit rate of a BRI" and the answers are a) 128 b) 144 c) 192 d)
> whatever.......what's the correct answer? Is it 144 kbps or 192 kbps?
You won't have those two answers :)
This is sort of like the argument is a T1 1.544 or 1.536. Only the most
evil test creator would put both those answers on a test...........
You seem to understand it quite well. 192 is with framing, 144 is just
2B+D. You can actually use the D channel, but you can't use the framing
bits.
>
> I realize that it is 192 kbps when you take the 48 kbps for framing into
> account.... but considering the fact that two Cisco sources give different
> totals for "total bit rate" what am I to answer if I wish to get the
answer
> correct?
>
>
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-----------------------------------------------
Brian Feeny, CCNP, CCDP [EMAIL PROTECTED]
Network Administrator
ShreveNet Inc. (ASN 11881)
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