[Asterisk-Users] DID trunks -- equipment requirement

[Tim Thompson]

You should be able to just order Trunk Lines.

They are also known as ground start lines.  They are usually for
incoming only so you would have something like 4-5 Trunk lines for the
incoming DID's and the rest would be regular pots lines.

In your CAC, you would take the Trunk lines and they would come in on
the FXS channels and the POTS lines would come in on the FXO channels.

 
In our area, Trunk lines run about $29-$35 each and then you pay for the
DID's.

Hope it helps.


Tim Thompson
Commercial Sales Engineer
http://www.amatechtel.com
(806) 722-2227


-----Original Message-----
From: Don Pobanz [mailto:dpobanz at hastingsutilities.com] 
Sent: Monday, December 22, 2003 4:42 PM
To: 'asterisk-users at lists.digium.com'
Subject: RE: [Asterisk-Users] DID trunks -- equipment requirement

On Monday, December 22, 2003 3:40 PM, john lawler 
[SMTP:maillist at tgice.com] wrote:
> Hi guys,
>
> I posted a somewhat similar question about a month ago and got a
> thoughtful resonse from Steven Critchfield, but I've got a quick
> follow
> up question to it.
>
> I'm looking to setup a 16 extension / 10-14 phone line Asterisk
> install
> for a customer who would like to have DID numbers for the extensions,
>
> since they're currently on Centrex and already have the 1-to-1
> correspondence.  Since I'm in a less populated area of the country,
> SBC
> doesn't seem to have much in the way of fractional T1 products (on 
the
>
> scale that we need them) available,

Have you asked for a full T1 but with just 10-14 DID/DOD trunks? We can 
not get fractional T1 here but on a full T1 we can add anywhere from 1 
- 24 trunks. So we pay one amount per month for the T1 and on top of 
that we pay another amount times the number of trunks we have.

I know this didn't exactly address your questions. For your primary 
question I believe that your would need different type of channels in a 
channel bank than FXOs. DPTs (Dial pulse) terminating come to mind, but 
that may be wrong.

Don Pobanz

>so I think my only option for DID
> is
> to use (analog) DID trunks for incoming calls and POTS lines for
> outbound calls.
>
> I'm familiar w/ POTS lines and have already done limited testing w/ a
> CAC channel bank equipped with FXO cards and that works fine.  What
> I'm
> concerned about is the DID trunks.  I've been told they have no
> dialtone
> and of course you can't place calls on them, but can receive calls.
>
> My question is, in general, should my CAC channel bank w/ the FXO
> cards
> that work on POTS lines work okay w/ analog DID trunks from the phone
>
> company?  Might I have to purchase additional equipment to handle the
>
> DIDs (going into one of two Digium T1 cards I have in the Asterisk
> box)?  Would they be different cards to plug into the CAC channel
> bank?
> Something totally different?
>
> Sorry to bring what I know is a rather off-topic question here, but
> the
> SBC guys don't like to help with customer education so much.  As
> always,
> I appreciate all of your expertise and patience with me and the other
>
> new guys.
>
> John Lawler

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