"Jam Man" <dajamdaddy@yahoo.com.au> wrote in message
news:1aQZh.32408$M.30450@news-server.bigpond.net.au...
>
> "Two Bob" <dept9@iprimus.com.au> wrote in message
> news:4636e6e8$1_1@news.iprimus.com.au...
>>> g'day,
>>>
>>> The role I do includes monitoring various sites for plant and
>>> intruder alarms. I work 2200~0600.
>>>
>>> Some sites use GSM as a backup to their standard dialler.
>>>
>>> I have some questions regarding the behaviour of these systems
>>> I hope somebody can answer, or at least direct me to a more
>>> appropriate ng.
>>>
>>> Occassionally these networks fail. We then ring people to advise
>>> them of this. It would be nice (when ringing someone at 0245) to
>>> be able to offer some reasoning for these failures. I can ring the
>>> mobile in question and hear it chirping, and for eg.. I wonder,
>>> well, if it answered, why is it appearing to be offline, or failed?
>>>
>>> Can rain be a cause for these failures.
>>>
>>> Or is mobile tower / repeater location (dropping in and out of
>>> signal range) a more likely cause?
>>>
>>
>> My guess is that when the unit dialled in, the codes got scrambled via
>> distortion, causing the base to miss the sign on code therefore not
>> recognising that it was armed. Maybe relocate the aerial to a better
>> spot. GSM, being a backup system shouldn't be used except for when the
>> main line goes down. Best to interigate the system via landline and if
>> everything is OK then treat the GSM signal as missing a beat.
>
>
>
> Thanks to all that replied, to this point. Most useful.
>
>
>
>

You need to explain in more detail as to how the system works, and how you
have come to the conclusion that the network is "down". It could be an
interfacing issue to the GSM dialler?



--
Posted via a free Usenet account from http://www.teranews.com