On 2010/10/28 15:18, [email protected] wrote:
> one thing I did several years ago was to use hylafax with a modem to dial the
> phone company's computers directly to send a page. This eliminated the 
> internet
> access as a dependancy for the page going out (replacing it with the much
> simpler POTS line dependancy)
>
> it worked well, but I'm not sure how useful something like this would be 
> today.
> If you are running something mission critical enough to need to be sure that 
> you
> can get alerted even in the face of internet connectivity problems, you should
> probably have a 24x7 operations staff monitoring your systems anyway (not to
> mention redundant internet connections).

Or another site whose monitoring system monitors the primary monitoring system. 
  Chances are one of them can reach the Internet and your mobile provider's SMS 
gateway, and tell you you've been partitioned, if nothing more specific.  I've 
done this even at (pairs of) very small sites, in preference to bothering again 
with IXO/TAP and a modem.  It's cheaper than a POTS line, if the second site 
exists already for some other reason (such as backups).

The modem thing injects it pretty quickly, and it used to go over the air quite 
soon after that.  But with everyone using data, sometimes to excess, I would 
anticipate potentially long delays in SMS even after it leaves your hands.  A 
list of people, on different carriers, is good diversity, too.
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