of course it's fine to oversubscribe like that ( except maybe in a busy VoIP
environment )

but that doesn't help the telco bottom line ;->

Chuck


""McCallum, Robert""  wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> I have seen circuits built and have been working absolutely perfectly with
> 5:1 contention.  For this scenario I would easily suggest a 2 or 3:1
> contention.  Lets face it what are the chances of the three buildings
> loading 14 MB each at the same time???  I say nil
>
> -----Original Message-----
> From: Chuck Larrieu [mailto:[EMAIL PROTECTED]]
> Sent: 01 February 2002 19:34
> To: [EMAIL PROTECTED]
> Subject: Re: frame relay question [7:34090]
>
>
> Some telcos have some basic oversubscription requirements, designed more
so
> that they can sell you more bandwidth than as a real practical
requirement.
>
> Here in California, for example, the local telco permits no more than a 2
> for 1 oversubscription.
>
> So if you have 20 spokes, each at 256K CIR, then you MUST have a minimum
> 2.56 megabit CIR at your center ( fractional DS3 or ATM ), for example.
>
> I believe the reasoning is that the telco does not want a lot of calls
> complaining about their circuits when the problem is overutilization of
> bandwidth. And they want to sell you more, of course. ;->
>
> Chuck
>
>
> ""Patrick Ramsey""  wrote in message
> [EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> > I usually use the 1 to 8 rule....  for every 8mb you think you need,
order
> 1
> >
> > Will each facility be pumping a solid 14mb across the wan all day long?
> >
> > If so, one ds3 (45mb) will suffice at the HQ....then purchase shaped DS3
> > circuits for the WAN... (15mb shape)
> >
> > -Patrick
> >
> > >>> "Yatou Wu"  02/01/02 01:20PM >>>
> > Hi,
> >
> > if there are one central site and three remote sites. all the remote
sites
> > need to connect to the central site. now I need to decide the access
> circuit
> > and port speed for the central site. the CIR requirement are following:
> >
> > Remote site A: 14M
> > Remote site B: 14M
> > Remote site C: 14M
> >
> > how many T3 access Circuits and ports are needed for the central sites?
> >
> > any advise is highly appreciated!
> >
> > yatou
> >
> >
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