[CentOS] Back-up connection

Sat Aug 17 02:13:59 UTC 2013
Ljubomir Ljubojevic <centos at plnet.rs>

On 08/16/2013 01:33 PM, Timothy Murphy wrote:
> Some weeks ago, I asked if anyone had set up a backup scheme for a remote
> server.
> By backup here, I mean an alternative arrangement that can be called upon
> if eg the DSL connection to the remote machine fails.
> I received one interesting reply:
> ======================
> At home, besides my fixed lines,
> I have two gsm-modems, one low-speed (that came free of charge with one of
> my fixed lines),
> the other is high speed, but pre-paid, normally off)
> ======================
> I meant to respond at the time, asking for further details,
> but forgot, and now I have lost the original message.
> So now I am posting again, asking if anyone has implemented any such
> arrangement.
> If you have, I would be very interested to hear the details.
> In my case, I spend time in two countries - Ireland and Italy -
> and have servers in each place.
> The problem in both places is that the ADSL modem sometimes goes off,
> and the only way to turn it back on seems to be
> to disconnect and re-connect the power supply.

I do not know how to find what I am looking for on net, so I will just 
try to explain how to reset your ADSL or other device via phone.

You can build a device that will use either power from phone/mobile 
speaker to charge capacitor that will in turn disconnect the power to 
any kind of device (power cord).

Idea is to dial that phones number and keep it ringing for a certain 
period of time. Impulses from the speaker (constant (polyphonic) melody) 
will keep charged a "electronic item/coil?" that will brake the power 
circuit/cable of your device. I usually kept it ringing for 10 seconds 
and after I stop calling, coil? will loose charge and return to the 
original position again closing the circuit and allowing to device to 
power up.

I am no engineer and my technical English is horrible, but I think any 
decent electrician/TV repairman should understand what I am talking about.

It's cheap and dirty manual trick, but when push comes to shove you can 
dial that phone and reboot the ADSL modem in no time.

Ljubomir Ljubojevic
(Love is in the Air)
PL Computers
Serbia, Europe

StarOS, Mikrotik and CentOS/RHEL/Linux consultant