[Asterisk-Users] Hardware for PBX with 4 incoming/outgoing lines and 20 phones

[Andrew Elchuk]

Most of the time we are only using 3 of the lines for calling.  If I 
used VOIP termination for outgoing calls wouldn't I still need the 4 
lines to receive all of our incoming calls?  Also do I need to have an 
IP phone to connect to a Wildcard TDM40B or could I just use the phones 
we have right now?  Thanks.

William Suffill wrote:

>Andrew,
>
>Sounds like it could be a good fit for your needs. Although that
>raises many questions as to how exactly you should deploy it. If you
>have a good Internet connection to the office in question you could
>perhaps use VOIP termination for your outbound calls instead of the
>current 4 PSTN lines. This way if all 20 people on the system could
>make calls at once or just 4 and you would only pay per minute on the
>usage.
>
>If you have good analog phones already then probably the channel bank
>route is the best way to support that many phones. Otherwise you could
>get IP Phones such as the Cisco 79xx , Polycom's or Snoms.
>
>Hard to say really what's best without knowing more of how much phone
>usage is in question and how much you would like to invest in an
>Asterisk/VOIP solution.
>
>Hopefully this along with the other posts you get on the list help you
>on your deployment. I'd be curious as to what you finally decide on
>after you weight the options.
>
>On Tue, 24 Aug 2004 17:11:36 -0600, Andrew Elchuk
><aelchuk at cronustech.com> wrote:
>  
>
>>Hi
>>
>>I am interested in setting up an Asterisk PBX in my office with digium
>>hardware, and I just have a few questions in regards to what I would
>>need.  It is my understanding that an FXO card is used to interface with
>>an incoming/outgoing phone line, and an FXS card is used for interfacing
>>with a phone within the system.  Currently we have 4 incoming/outgoing
>>phone lines and would like to have 20 phones in the system.  In order to
>>accomodate this, would you either reccommend having 1 TDM04B (4 FXO
>>modules on it) for the 4 incoming/outgoing lines, and 5 TDM40B (4 FXS
>>modules on each) for the 20 phones we would have in the system.  Or
>>would you reccommend 1 TDM04B for the 4 incoming/outgoing lines, and a
>>T100P connected to a channel bank of some sort to connect to the
>>internal phones?  If you reccommend the T100P and channel bank, where do
>>you suggest I get an FXS channel bank?  Please let me know if I got any
>>of this mixed up (like if I got the FXO and FXS cards mixed up) and
>>thank you in advance for your help in us deciding the hardware we need
>>for a new PBX.
>>
>>Andrew Elchuk
>>
>>P.S.  We are currently using an X-Like software phone with a free world
>>dialup account for communication with our other office in a different
>>city.  My question is if I can configure the extensions.conf to connect
>>to a free world dialup number when executing a dial command, or would I
>>need to edit sip.conf as well or some other configs or is that even
>>possible?  Thank you again.
>>
>>--
>>Andrew Elchuk
>>Technical Associate
>>Cronus Technologies
>>248 - 111 Research Drive
>>Saskatoon, SK  S7N 2X8
>>Tel: (306) 652-5798 ext. 112
>>Fax: (306) 652-5799
>>Toll Free: 1-877-655-5798
>>http://www.cronustech.com
>>
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>>    
>>
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-- 
Andrew Elchuk
Technical Associate
Cronus Technologies
248 - 111 Research Drive
Saskatoon, SK  S7N 2X8
Tel: (306) 652-5798 ext. 112
Fax: (306) 652-5799
Toll Free: 1-877-655-5798
http://www.cronustech.com

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