[Outages-discussion] External monitoring

[Jay Hennigan]

On 9/21/17 10:43 AM, Greg Dickinson wrote:
> So this isn’t directly “outage” related, but if you squint really hard 
> and look at it sideways, it might fit the standard :)
> 
> I need to monitor our phone system for the ability to dial in and out 
> (basically, monitor our SIP trunks and related infrastructure, back to 
> the PBX).  I envision a service that would place a call every few 
> minutes (15 or 20) to a specified number, and if it got no answer, would 
> send an alert.  Does anyone know of a service like this, or have an 
> alternative way of testing this?

Most legacy PSTN carriers have test numbers, one example is "milliwatt" 
which answers and plays a 0dBm tone at 1004 Hertz. You could dial this 
periodically and either parse the SIP response by one of the means 
suggested or build an Arduino or Raspberry Pi based device to "listen" 
to the tone.

--
Jay Hennigan - CCIE #7880 - Network Engineering - jay at impulse.net
Impulse Internet Service  -  http://www.impulse.net/
Your local telephone and internet company - 805 884-6323 - WB6RDV