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

[jonc at nc.rr.com]

VoIP uses a control stream (SIP, SCCP, MGCP, AIX) and a voice stream (RTP). The voice stream is compressed and transmitted using the Codec.  The control stream is digital and is used for DTMF as well as CallerID and other functions.

To make our lives easier at the connection with the PSTN we use PRI connections which send Voice down one channel and Data down a separate channel. So DTMF always stays in the Data stream and Voice always stays in it's own separate stream - even at our interconnects with the Public Switched Telephone Network. :-)

Jon

---- Tanner Lovelace <clubjuggler at gmail.com> wrote: 
> On Wed, Jun 4, 2008 at 10:20 AM,  <jonc at nc.rr.com> wrote:
> 
> > 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
> 
> How does FeatureTel support the user sending DTMF tones while using G729?
> 
> Cheers,
> Tanner
> -- 
> Tanner Lovelace
> http://wtl.wayfarer.org/
> (fieldless) In fess two roundels in pale, a billet fesswise and an
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