From: Volkov, Dmitry (Toronto - BCE) (dmitry_volkov@ca.ml.com)
Date: Wed Nov 06 2002 - 21:01:52 GMT-3
Check here:
http://www.acterna.com/united_states/technical_resources/downloads/white_pap
ers/fund_ds3.pdf
Dmitry Volkov
CCIE # 10292
> -----Original Message-----
> From: Charles Huang [mailto:routing@icharles.no-ip.com]
> Sent: Wednesday, November 06, 2002 8:29 PM
> To: Peter
> Cc: CCIE
> Subject: RE: How many DS3 frames per second ?
>
>
> Peter,
>
> Thank You for your information.
> But I found that the 1 DS3 frame has 4760 bits. (4703 bits
> for data, 56 bits
> overhead)
> And the bandwidth for DS3 is 44.736Mbps.
> 4760 * 8000 just doesn't add up up 44.7M
> but on DS1, 193 bits/frame * 8000 frames/sec does equal to 1.544Mbps
>
>
> Charles
>
>
> -----Original Message-----
> From: Peter [mailto:g4bbu@whittle-systems.demon.co.uk]
> Sent: Wednesday, November 06, 2002 1:57 PM
> To: Charles Huang
> Cc: CCIE
> Subject: Re: How many DS3 frames per second ?
>
>
> Charles,
>
> There are 8000 per second. In the Telco world everything is
> keyed into
> voice requirements. Speech needs some 3 - 4 kilohertz
> bandwidth, Nyquist
> theorem states that you need to sample at atleast twice the highest
> frequency => you need 8000 samples per second.
>
> This applies to DS0, (8000 x 8bits = 64 k), DS1, DS3, STM-1
> (OC3), STM-
> 4, STM-16, or even STM-64 (10 GBits/S).
>
> There are always 8000 frames per second, what changes as you go up the
> higher-archie in speed is the size of the frame.
>
> Hope this helps
>
> Peter
>
> In message <MOENKIKMFEOHGBMMOGLPIEBECJAA.routing@icharles.no-ip.com>,
> Charles Huang <routing@icharles.no-ip.com> writes
> >All,
> >
> >I know that there are 8000 DS1 frames per second.
> >Does anybody know how many DS3 frames are there per second?
> >
> >
> >Thanks
>
> --
> Peter
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