[asterisk-users] Digium FXS specifications and limits Question

asterisk at ihearbanjos.com asterisk at ihearbanjos.com
Fri Mar 2 12:15:37 CST 2012

Thanks for the info... The box looks very interesting. It looks like I'd
still void a warranty if I used it though. :-) I'm OK with voiding
warranties and pushing limits, but I wonder if anyone else has tried it an
what the outcome was. I also wonder if there's something out there from a
different manufacturer that is designed spcifically to support my

Thanks Again.

> On Thu, Mar 01, 2012 at 05:35:34PM -0700, Nunya Biznatch wrote:
>> Howdy All,
>> I'm considering Asterisk / Digium as a replacement to my existing phone
>> switch. I need to continue to be able to push analog lines between
>> multiple buildings in a campus environment.
>> The Digium Analog 410 Card manual states it's not recommended to go
>> beyond 1500 feet distance for an FXS card, and no line should leave the
>> building or be bundled. The 2400 Series Manual does not have this same
>> notice. Should it?
>> My potential application will be pushing all of 1500 feet and maybe a
>> teeny bit more. Analog lines will be bundled into PE-89 type
>> direct-burial rated cable in capacities ranging from 100-pair to
>> 500-pair. All cable pairs are 24AWG. All cable is privately owned by the
>> organization. All cable is professionally terminated on each end to
>> grounded building entrance protection with lightning blocks / surge
>> protection. This infrastructure has been in place and working on an
>> existing "old school" digital switch with port cards that don't have
>> lightning or surge suppression built in, just like the Digium cards.
>> Has anyone run a similar configuration and can speak for or against such
>> an idear?
> If you must do this, Mike Sandman (and probably others) has a line of
> loop extenders.  I've used his stuff before to keep old POTS stuff
> running.
> 	http://www.sandman.com/longloop.html
> These devices may also give you a little more lightning protection than
> you already have, but I wouldn't count on it.
> --
> Barry
> --
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