[Asterisk-Users] What do I need to build up DID services?

Dorn Hetzel asterisk-users at dorn.hetzel.org
Sun Dec 26 13:22:47 MST 2004

On Sun, Dec 26, 2004 at 02:22:43PM -0600, James Taylor wrote:
> On Sun, 26 Dec 2004 14:17:59 -0500, Dorn Hetzel  
> <asterisk-users at dorn.hetzel.org> wrote:
> >On Sun, Dec 26, 2004 at 12:16:24PM -0600, James Taylor wrote:
> >>On Sat, 25 Dec 2004 10:43:00 -0500, Dorn Hetzel
> >><asterisk-users at dorn.hetzel.org> wrote:
> >>
> >>>On Sat, Dec 25, 2004 at 04:27:52PM +0800, Ronald Wiplinger wrote:
> >>>>Greg Hill wrote:
> >>>>
> >>>>I am looking for a small device with four FXO and one WAN connection.
> >>>>Simple, so that the cleaning woman can make a hardware reset if
> >>>>necessary. This device should be connnected to my Asterisk box. The  
> >>box
> >>>>will be used in areas where DIDs are not available yet, and where you
> >>>>not even can make ads for it ;-(
> >>>>It should be cheap, and it should connect either with SIP or IAX.
> >>>>No FXS is needed !!!
> >>>>
> >>>I'm not sure, but I think your best price/performance solution
> >>>might be a very small linux system (1U or smaller) with one
> >>>Digium TDM400P+4*FXO daughtercards.  At least the the size
> >>>point of 4*FXO, this may turn out to be your winner.  If it
> >>>boots from flash, your cleaning lady can always apply power
> >>>cycle for anything you can't fix via ssh...
> >>>
> >>>By using this solution, you would also get the ongoing
> >>>bandwidth benefit of being able to trunk all 4 FXO calls
> >>>out in a single IAX frame.  This will save you money on
> >>>an on-going basis if your bandwidth costs are significant.
> >>>
> >>>Perhaps Soekris would be a good box for this solution,
> >>>but there may be even smaller devices with the needed
> >>>1*PCI interface, I don't know.
> >>>
> >>>Regards,
> >>>
> >>>-Dorn
> >>
> >>A MAX 4096 will work. And they're cheap.
> >>I'm using the TNT's.
> >>Contact me  off list.
> >>
> >
> >That seems kind of overkill to service 4 pots lines ...
> >
> And, you can't do DID on pots lines.
> You can use BRI.
> or You can use 4 wire trunks.
> It's cheaper to do T1's and only use a few channels.

(a) there are definitely analog DID implementations out there.
	not saying they're pretty, but they exist...

(b) are you really sure it's cheaper with only 4 channels to
	do a T1?  including local loop? 

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