[Asterisk-Users] Channelbank Recomendation and GS102 question

[Steven Critchfield]

On Fri, 2003-12-05 at 08:34, Jim Flagg wrote:
> ---- Original Message ----- 
> From: "Ariel Batista" <abatista at avionica.com>
> To: <asterisk-users at lists.digium.com>
> Sent: Friday, December 05, 2003 8:52 AM
> Subject: Re: [Asterisk-Users] Channelbank Recomendation and GS102 question
> 
> 
> > 
> > > > >>  We have an installation with 9 inbound voice channels (one is the
> > > > >>fax) and 768K data.  It is a Hybrid PRI.  It terminates into a
> > > > >T100P.  It is working great!  The >cost was better than the
> > > > POTS plus data.
> > > > >
> > > > >Can I ask what Telephone/Internet service provider you are
> > > > getting this from?
> > > > >Does anybody else have a setup like this?
> > >
> > > > I, too, would be interested in hearing from what vendor you are
> > > > getting such a service.
> > > >
> > > > JT
> > 
> > Just wanted to say our PRI provider here in South Florida has this Hybrid
> > system too!  They are suppose to be offering this setup all over the US.
> > There's is 6 voice channels and 512K Data!  There called Allegiance Telecom,
> > Inc.  We have a full PRI from them.  But out sister company has there
> > Hybrid!  Works great!
> 
> Yes, I am aware of these types of setups.  I have used http://www.cbeyond.com.
> They are one of the few that dynamically vary the bandwidth between voice and
> internet based upon how many calls are in progress.  If no calls are in progress
> the whole 1.5Mb is available for internet connections.
> 
> The part that intrigued me was, "It terminates into a T100P", implying that there are
> no channel banks between the ISP provided equipment and the T100P.  I strait
> digital T1 connection.  It seems like this would require some modifications to Asterisk
> and some coordination with the telephone/internet provider.  That's what I was
> interested in.

Basically it works like having ISDN dialup with a lot of bonding. When
asterisk notices more than X lines idle, it dials up the other side and
sends it off to ZapRAS to bond the channels in. If asterisk notices less
than X channels free, it disconnects one of the ZapRAS channels.
Bandwidth is then in units of 64K connections.
-- 
Steven Critchfield  <critch at basesys.com>