[olug] OT: Bandwidth Requirements for VOIP

Justin Reiners justin at hotlinesinc.com
Sun Dec 23 18:43:43 UTC 2012


The only way we could switch to VoIP reliably with Cox (in their words) was
switch to optical internet. Then they would be able to do QoS on it.
On Dec 23, 2012 12:34 PM, "Dave Thacker" <dthacker at bluestrain.net> wrote:

> On Sunday, December 23, 2012 10:45:43 AM Dan Linder wrote:
> > I'll second Lous comments.  Even at five calls times 60k is well below
> the
> > 1MB of the low end data rate plans.  If you dont have Internet for them
> > yet, look at the low end business class options from Cox.  Their SOHO
> > option I had the past couple years was only  $30/mo than regular home
> > internet, but the QoS was separate from the Cox home users so snow days
> > didn't affect performance.  Another plus is your a business so you get
> > priority in the repair queue.
> >
> > Dan
>
> The office is currently on a Cox Business Plan.  We're looking how to
> match up
> capacity with future use.
>
> DT
> >
> > On Dec 23, 2012 9:36 AM, "Lou Duchez" <lou at paprikash.com> wrote:
> > > When you say "VoIP", do you mean you'll be using Vonage, or Asterisk,
> or
> > > what?  Is there a particular goal you're trying to meet by switching to
> > > VoIP?
> > >
> > > The minimum bandwith is pretty much a function of the compression -- a
> > > call can take 10k or 60k, depending.  Also, faxes don't tend to work
> that
> > > well over VoIP, and certainly not with G.729 compression (the low
> > > bandwidth kind).
> > >
> > > And if you're using DSL or cable modem for both VoIP and Internet
> > > traffic, you may experience dips in quality if the VoIP is competing
> > > with downloads.
> > >
> > >  QoS can help, but it can really only help with the outbound part of
> the
> > >
> > > call; the prioritization of traffic coming down the pipe is decided by
> > > your ISP.
> > >
> > > I find that VoIP can be as reliable as regular phone service, but to
> > > really do it right you need a business-grade VoIP product provided by a
> > > carrier like XO, and it will likely involve buying a phone system.
>  Cheap
> > > VoIP over a DSL can work pretty well, for the most part; but if your
> > > business is utterly reliant on your phones, hiccups and problems caused
> > > by cheap VoIP may hurt your business more than you save.
> > >
> > >  I'm looking at moving my wife's office over to VOIP this year. There
> are
> > >
> > >> currently 2 lines supporting 4 users.   Fax traffic is less than 20
> > >> pages a
> > >> week in/out.   Talk time can be sometimes be quite lengthy when
> dealing
> > >> with
> > >> the IRS or clients.   What would you recommend as a good bandwidth
> level
> > >> to
> > >> support the office?  Are the other questions I should be asking?
> > >>
> > >> Thanks!
> > >> Dave Thacker
> > >>
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