[A*UG] PRI and line sharing

[Brett Nemeroff]

Jim,PRI calling is much more sophisticated than "hunt groups"

In general, with a PRI you have 23 lines. When a call comes in , it's
presented with the DIALED NUMBER (also referred to as DNIS) so the server
knows what number was called. This way, all lines on the PRI can be used for
any of your DIDs.

Of course, it IS possible that you have a old skool T1 and not running PRI
on it. In which case you WOULD have hunt groups. In that case a given DID
would be reserved for use on a specific set of channels on that T1


On Wed, Jul 29, 2009 at 10:37 AM, Jim Freeze <jimfreeze at gmail.com> wrote:

> Hi Brett
>
> On Tue, Jul 28, 2009 at 11:40 PM, Brett Nemeroff<brett-aaug at nemeroff.com>
> wrote:
> > Jim,
> > In general, any resource can be shared between servers. However you need
> to
> > consider the impact it will have on the bandwidth.
> > So if server A has the PRI, but server B has the phones, the calls go
> from
> > the provider INTO Server A, then OUT of Server A (doubling the bandwidth
> > usage at that site) then INTO Server B.
> > It's done for inbound calls much in the same way you do it for outbound
> > calls. For inbound calls you simply dial the other server (so you'll need
> a
> > sip/iax connection between the two servers)
> > With more modern systems, you don't normally have to worry about hunt
> groups
> > and such. Unless of course you actually have analog hunt groups. If you
> do,
> > the same applies, but you need some way to identify which inbound call is
> > for which server. For analog lines, this is usually either done by an IVR
> > prompting the user like "Push 1 for sales, push 2 for support" where
> sales
> > could be local, but support may be Server B. Or you have to create
> separate
> > hunt groups for each Server.
> > I'm not sure if that helps or confuses things. ;)
>
> In this case (OP may have been unclear), there is a single Asterisk
> Server. This may boil down to my lack of understanding (and my
> twtelecom rep). Is there such thing as a 'hunt' group on a PRI?
>
> Say I have 10 digital lines with 2 DiDs. One DiD for each office. When
> a call comes in, how is it presented to asertisk? In an analog system
> using TDM, there is a one-to-one correspondence with phone number and
> physical line. How does this work with digital?
>
> On a PRI based system, if 5 people call number A, I'm guessing there
> is no 'hunting' since there does not have to be a number for each
> line.
>
> Jim
>
>
> --
> Jim Freeze
>
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