asterisk users - Mar 2012 - Digium FXS specifications and limits Question

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?


Thanks for the help and input,

Jason

On 03/01/2012 06:35 PM, 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?
Yes. All of Digium's FXS modules are designed for short-haul, inside 
wiring applications.

-- 
Kevin P. Fleming
Digium, Inc. | Director of Software Technologies
Jabber: kfleming at digium.com | SIP: kpfleming at digium.com | Skype: kpfleming
445 Jan Davis Drive NW - Huntsville, AL 35806 - USA
Check us out at www.digium.com & www.asterisk.org

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