[A*UG] PRI and line sharing

[Brett Nemeroff]

Whoops! you are very right. With a PRI the canreinvite doesn't really buy
you anything here..
However, bandwidth is still a concern. Especially for station to station
calling in the location without the server.

As for your original question, as Mark said, it's very common to share both
the inbound and outbound resources. In fact, from the severs perspective,
the remote phones don't even look remote. They are just IP connected..

-Brett

On Wed, Jul 29, 2009 at 10:28 AM, Mark Barry <mark at exabar.com> wrote:

> Brett,
> Maybe Jim can elaborate on the original question, however I took it to mean
> that he is using a digital PRI circuit from one of the local carriers. In
> this case the reinvite would not apply anyway.
> I do concur with you that bandwidth and traffic shaping need to be taken
> into consideration for this type of setup.
> Sharing a PRI circuit in this way is quite common.
> Mark
>
>
> On Wed, Jul 29, 2009 at 9:18 AM, Brett Nemeroff <brett-aaug at nemeroff.com>wrote:
>
>> Actually, the issue still remains even if there is only one server, unless
>> you are using canreinvite which honestly I wouldn't recommend given the
>> possibility of station to station routing between public and private IP
>> address phones.
>>
>> So PRI goes to Server A, then RTP leaves Server A to Site B. You still use
>> bandwidth at both sites for each call.
>>
>> -Brett
>>
>> On Wed, Jul 29, 2009 at 1:07 AM, Benjamin Hudgens <bhudgens at photodex.com>wrote:
>>
>>> Hey Jim --
>>>
>>> I got the impression it was the same system serving both offices? Ie, one
>>> server managing one PRI, feeding both locations?
>>>
>>> Quite possibly I missed something...?
>>>
>>> Cheers,
>>> Benjamin
>>>
>>> ------------------------------
>>>  *From*: austin-asterisk-users-group-bounces at bybent.com
>>> *To*: Jim Freeze
>>> *Cc*: austin-asterisk-users-group at bybent.com
>>> *Sent*: Tue Jul 28 23:42:57 2009
>>> *Subject*: Re: [A*UG] PRI and line sharing
>>>
>>> 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. ;)
>>> -Brett
>>>
>>> On Tue, Jul 28, 2009 at 9:40 PM, Jim Freeze <asterisk at freeze.org> wrote:
>>>
>>>> I am installing a channel 12 (11 digital phone lines) using a PRI and
>>>> I have a few questions about hunt groups and line pooling.
>>>> The system is serving two offices, each with their own DiD.
>>>>
>>>> I'm wondering if there is a way to pool the lines between the offices,
>>>> so that both offices can use any available line. I know this can be
>>>> done for outgoing calls, but the real question is can it be done for
>>>> incoming calls. I assume that each DiD will need a hunt group, but
>>>> defining a hunt group seems to exclude the possibility of pooling the
>>>> lines for incoming calls.
>>>>
>>>> Does anyone know if this is possible?
>>>>
>>>> --
>>>> Jim Freeze
>>>> _______________________________________________
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>>>> Austin-Asterisk-Users-Group at bybent.com
>>>> http://bybent.com/mailman/listinfo/austin-asterisk-users-group
>>>> AAUG Web Site: http://aaug.bybent.com/
>>>>
>>>
>>>
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>>>
>>>
>>
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>>
>>
>
>
> --
> Mark Barry
> Exabar Phone Systems
> 512-258-2175
>
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