Michael Boman wrote:
> On Tue, Mar 4, 2008 at 9:31 AM, Hua Eng Lim <[EMAIL PROTECTED]> wrote:
>   
>> Hi Marc.
>>
>>  Thanks for comments. My simple thinking is that SMS gateway service company 
>> sould be able to keep it's system up and running 99.9%.
>>     
>
> Can you say the same for your Internet connection?
>   

Yeah, removing as many points of failure in your notification system is
better.

Having a GSM modem hooked up to your monitoring machine directly removes
one point of the failure, the Internet. Yes, you still rely on the
mobile network being up but:

  probability(cellularfailure) < probability(cellularfailure) +
probability(internetfailure) .

Has the added benefit that you can notify by SMS if your internet link
goes down 8)

We use a falcom GSM modem with a simple DB9 serial connection and
smstools. Works fine and the GSM modems are quite inexpensive (it was
somewhere around $400 a few years back IIRC).


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