[asterisk-users] 1000 analogue lines with asterisk

[Harry McGregor]

Hi,

All of the back and forth of Analog vs VoIP handsets tend to ignore some 
of the basic issues.

What type of cabling is in place, does it need to be upgraded to do 
Ethernet, etc.

The "gateways" can be handy if there are many closets where the wiring 
terminates AND you have Ethernet to these locations.  That being said 
you probably should have some amount of backup battery power any 
location you put a gateway.  You can also do this running your own T1 
lines to the closet and channel banks in the closet.

If all of the lines come back to the same place, you only have to have 
backup battery in a single location.

I have seen enough hackish VoIP deployments, that I can see many cases 
that Analog is cleaner.  For example, IBM Type1 cabling, can't run PoE, 
so they installed wall warts with each phone...

You also have to look at the use case.  Doing an "office" with Analog is 
very different then doing a phone in each classroom at a school, or even 
hotel phones.

The channel banks, even if you have to buy multiple to get the right 
cards, should average under $200 each, 8 port T1 cards are about $2K 
each, total cost to service 22x$200 + 6x$1000 = $10,400, or about $10 
per port, and you should be able to do it cheaper then this. This is of 
course using Ebay pricing, new would be much higher.

The gateways run about $25-30 per port, even for the lower end (like the 
Grandstream below).

Cabling costs depend greatly on location, around here it averages 
$100/drop in office environments, if your only doing one run to each 
room, it gets even higher, this is where the real cost of using VoIP 
handsets comes into play.

-Harry



On 02/17/2016 07:38 PM, Jeff LaCoursiere wrote:
>
> That would be the expensive route.  The inexpensive route would be to 
> buy FXS ethernet gateways, like this: 
> http://www.voipsupply.com/grandstream-gxw4248. You could then get by 
> with a single reasonably sized asterisk box (probably two setup as HA) 
> and no need for expensive cards or complex channel bank setup.  We 
> have done many hotels this way with great results.
>
> j
>
> On 02/17/2016 05:39 PM, chris wrote:
>>
>> +1
>>
>> spending money to get that many fxs ports is going to negate any 
>> savings of reusing analog phones instead of buying ip phones
>>
>> 1000 analog ports sounds like hell and if it was me I  would be 
>> embarrassed to have a setup like that tied to my name if I was a 
>> consultant etc. Someone will come in after you and ask who set it up 
>> and the customer will say you :)
>>
>> On Feb 17, 2016 4:23 AM, "A J Stiles" <asterisk_list at earthshod.co.uk 
>> <mailto:asterisk_list at earthshod.co.uk>> wrote:
>>
>>     On Wednesday 17 Feb 2016, Goke Aruna wrote:
>>     > Hello all,
>>     > Can someone recommend what hardware to use for a 1000 analogue line
>>     > capacity asterisk PABX?
>>     >
>>     > Regards
>>
>>     A PCI express card with four primary rate ISDN ports, each linked
>>     up to a
>>     channel bank, will give you 120 analogue lines.  So you will need
>>     nine such
>>     cards; and for reasons of simple numbers of slots on a
>>     motherboard, they will
>>     have to be split among three or more servers, linked to a gigabit
>>     switch.
>>
>>     You might end up getting a better deal if you bought 1000
>>     hardware SIP phones.
>>     (You also would probably increase your personal indispensability
>>     factor, into
>>     the bargain .....)
>>
>>     --
>>     AJS
>>
>>     Note:  Originating address only accepts e-mail from list! If
>>     replying off-
>>     list, change address to asterisk1list at earthshod dot co dot uk .
>>
>>     --
>>     _____________________________________________________________________
>>     -- Bandwidth and Colocation Provided by http://www.api-digital.com --
>>     New to Asterisk? Join us for a live introductory webinar every Thurs:
>>     http://www.asterisk.org/hello
>>
>>     asterisk-users mailing list
>>     To UNSUBSCRIBE or update options visit:
>>     http://lists.digium.com/mailman/listinfo/asterisk-users
>>
>>
>>
>
>
>

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.digium.com/pipermail/asterisk-users/attachments/20160218/29a3b51a/attachment.html>