[asterisk-biz] How Realistic is Hosted VoIP for SMBs?

[GlobalOfficePhone]

I appreciate the thoughts posted on the this thread. If I may, I would like
to rephrase the question about hosted VoIP for SMBs:

Can Asterisk allow direct media (audio) between two end points that are
behind a NAT (typical SMB scenario) that is different than the the NAT where
Asterisk server is located (hosted VoIP)?

According to *Olle E. Johansson, *Asterisk guru,
(http://lists.digium.com/pipermail/asterisk-doc/2004-June/000547.html)

Canreinvite=yes *only* works if all devices are on the same side of the NAT, the
> outside or the inside.
>
> If one device is on a different side of a NAT device than another phone
> or Asterisk, you can't allow re-invites for that device.
>
>
He attributes this limitation to Asterisk not being a true SIP Proxy. That
being the case, would one have to put SER or Session Border Controller (SBC)
in front of Asterisk to achieve peer-to-peer media stream directly between
the endpoints thus avoiding the WAN? Or, would one have to use SipX which IS
a true SIP proxy as well.

Thanks.



On 11/3/06, Mike Hammett <asterisk-biz at ics-il.net> wrote:
>
>  How redundant is it?  I'm still waiting to hear from them directly, but
> is it completely 1 + 1 redundant?  It might protect against Asterisk
> failures, but does it then become a single point of failure?
>
>
> ----
> Mike Hammett
> Intelligent Computing Solutions
> http://www.ics-il.com
>
>
>
> ----- Original Message -----
> *From:* Brett <ranchlist at gmail.com>
> *To:* ron at wellsted.org.uk ; Commercial and Business-Oriented Asterisk
> Discussion <asterisk-biz at lists.digium.com>
> *Sent:* Friday, November 03, 2006 11:21 AM
> *Subject:* Re: [asterisk-biz] How Realistic is Hosted VoIP for SMBs?
>
> You guys need to look into the Ranch Networks solution.  With a Hosted
> PBX, you can put the Asterisk box at you location.  Then we take a Ranch
> Networks box and put it at the customers site.  the Ranch Networks box does
> all the NAT traversal, qos, firewall, etc. plus it will bring the media
> locally so you don't have to go over the internet for simple branch to
> branch calls.  Plus, the ranch Networks box provides high availability or
> clustering if you need that.
>
> There ya go, one box fixes all.
>
>
>
> On 10/30/06, Ron Wellsted <ron at wellsted.org.uk> wrote:
> >
> > -----BEGIN PGP SIGNED MESSAGE-----
> > Hash: SHA1
> >
> > shadowym wrote:
> > > If you don't have full control of the network from end to end (or have
> >
> > > someone do that for you), it will never be a reliable solution in my
> > humble
> > > opinion.  People are getting away with it in some cases but the bottom
> > line
> > > is they cannot guarantee quality of service.
> > >
> >
> > I must agree with this having seen a 5 phone office with a hosted system
> > over ADSL.  The system was never reliable and they eventually scrapped
> > it and came to us.  As we are in the same building, I setup their phones
> >
> > on to asterisk with their own contexts, etc. and replaced their simple
> > switch with a Linksys 224P (poe + layer3 managed).  Inbound calls are
> > presented on a ISDN BRI (ZapHFC), outbound via VoIP.  The only comment
> > has been about the occasional slight echo.
> >
> > - --
> > Ron Wellsted
> > ron at wellsted.org.uk http://www.wellsted.org.uk
> > N 52.567623 , W 2.137621 Linux Counter No. 202120
> > FWD:519961
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> >
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