[TriLUG] OT - TWC bandwidth caps on the way?

[Rob Lockhart]

On Wed, Jun 4, 2008 at 10:20 AM, <jonc at nc.rr.com> wrote:

> 40GB won't endanger any VoIP carrier that I've ever heard off... VoIP
> requires continuous low latency connections, but very little bandwidth.
>
> Vonage: 1hr = 300Mb (max)
> FeatureTel: 1hr = 100Mb (max)
>  "max" means all talking all the time - no pauses (like listening to music)
>
> Vonage uses G711 codec which maxes out at 87 Kbps
> FeatureTel defaults to G729 codec (voice only - no noise) which maxes out
> at 31 Kbps
>
>
Hi, Jon.   Vonage has three tiers of bandwidth you can provision: 30, 50,
and 90kbps.  So, if we assume worst-case, 90kbps, one hour (bidirectional)
traffic:
90E3*2*3600/8 = 81 MBytes.  Did I do the math right?  I assume 90kbps to
take into account the signaling and framing overhead, etc.
Now multiply that by 24 hours/day, 30 days/month you get 58 GBytes.
Whoops!  So don't talk on the phone all month long.  :-)

I thought G.711 would require the same bandwidth if background noise is sent
from the far-end.  You're probably more familiar with whether Vonage's
implementation of G.711 requires bandwidth for silences.

I think I saw that the cap was on both upstream and downstream (aggregate).