Actually, the total bandwidth depends on the line coding and framing on a T1
circuit.
b8zs with esf gives you 64k per channel
use ami with sf (sometimes called d4), and you loose bandwidth to signaling,
so you just get 56k per channel
This is the way I learned anyway..I could always be wrong.
It happens :)
Richard A. Holland
Voice/Data Integrator
Telec, Inc.
http://www.telecinc.com
CCDA,CCNP,MCSE
-----Original Message-----
From: Edward Watson <[EMAIL PROTECTED]>
To: NetEng <[EMAIL PROTECTED]>
Cc: Cisco List <[EMAIL PROTECTED]>
Date: Thursday, September 28, 2000 12:20 PM
Subject: RE: PRI vs T1
>PRI has 23B+1D. T1 (also called a "channalized" T1) has 24 B-channels.
>Therefore, you have a 64k bandwidth difference. The book is correct
because
>only T1 has 1.544MB (usable) bandwidth.
>
>Both use a T1 circuit. The difference can be important if you're using the
>circuit for dial-up modem users. If you have 48 modems in an AS5300 with
>two PRIs for the dial-up, only 46 modems can be used concurrently. If you
>have two T1s, all 48 modems can be used concurrently.
>
>Edward Watson, CCNA
>Consulting Engineer
>Info Avenue
>3545 Centre Circle Drive
>Suite A
>Fort Mill, SC 29716
>803.802.6507 (voice)
>888.662.5835 pin-15309 (pager)
>[EMAIL PROTECTED]
>www.infoave.net
>
>
>-----Original Message-----
>From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of
>NetEng
>Sent: Thursday, September 28, 2000 10:44 AM
>To: [EMAIL PROTECTED]
>Subject: PRI vs T1
>
>
>Is there a difference between a PRI and a T-1? What has 23B + 1D? What one
>has 24B? The reason I ask is I have a practice question that asks, "what
>provides 1.544Mbs bandwidth." PRI and T-1 are answers, but only PRI is the
>correct answer (according to the test). What's the final answer????
>
>
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