From: John (jgarrison1@austin.rr.com)
Date: Thu Jul 03 2008 - 14:45:22 ART
Thanks all,
So this begs the question, which speed should I use? I like the 1536
because it's the actual speed
----- Original Message -----
From: "Scott Morris" <swm@emanon.com>
To: "'John'" <jgarrison1@austin.rr.com>; <ccielab@groupstudy.com>
Sent: Thursday, July 03, 2008 10:53 AM
Subject: RE: T1 speed
> The technical throughput for data is 1.536M (24 channels * 64000 bps each
> =
> 1536000 bps). In an ESF format (common framing these days) there is an
> additional 8k in framing bits (1 bit every 192 bit superframe). So 193
> bits
> * 8000 cycles per second = 1544000 bits per second.
>
> That 193rd bit is basically unusable for data which begs the question why
> Cisco routers default to that bandwidth. So it all boils down to your
> level
> of technical accuracy or anal-retentive attention to detail.
>
> ;)
>
> HTH,
>
>
> Scott Morris, CCIE4 #4713, JNCIE-M #153, JNCIS-ER, CISSP, et al.
> CCSI/JNCI-M/JNCI-ER
> Senior CCIE Instructor
>
> smorris@internetworkexpert.com
>
>
>
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>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> John
> Sent: Thursday, July 03, 2008 11:55 AM
> To: ccielab@groupstudy.com
> Subject: T1 speed
>
> The speed that I've always known is 1544 kbs. Now in almost all of the IE
> labs it's 1536 kbs. I've searched (probably in the wrong places) and all
> I
> get is 1544. Where in the heck are they coming up with 1536.... EU-T1?
>
>
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