Re: Sole Path ???

["Russell Brill" <russwbrill@xxxxxxxxxxxxx>]

Nick,

The TG-7FS is polled by the Telular Comm center servers every couple of
minutes.. If it fails to check-in for more than 5 minutes a communications
trouble will be sent to the central station... The TG-7FS has far more
supervision than a standard phone line(s)....

Regards,
Russ

"nick markowitz" <nmarkowitz@xxxxxxxxx> wrote in message
news:63cb8e2e-c077-412f-b6a8-c1ee9657a80b@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
On Feb 7, 5:53 pm, jewellfish <jewellf...@xxxxxxxxx> wrote:
> On Feb 7, 2:18 pm, "Bob La Londe" <n...@xxxxxxx> wrote:
>
>
>
> > I received a phone call and an e-mail the other day from one of the reps
> > for
> > Telular. He was all excited that they have a communicator suitable for
> > sole
> > communication for commercial fire. I listened to him and read some of
> > the
> > info he e-mailed to me and it just doesn't add up.
>
> > It looks like a GSM communicator sending two signals instead of one. Big
> > whoop. Its still a single communication path. Now if it incorporated a
> > GSM
> > and a CDMA communicator with a trouble output if either fails to test I
> > might buy into it, but it sure doesn't look that way when giving it the
> > quick once over. Instead they seem to indicate the the NFPA standard was
> > changed???
>
> > Really? All these years that we have been required to provide two
> > communication paths, and now NFPA says we only need one? Is this true?
> > What am I missing?
>
> > Esplain it to me Rucy.
>
> Bob,
>
> I am most familiar with the 2002 & 2007 editions of the code as most
> locations I deal with have not adopted the 2010 version of NFPA yet
> and so the following refers to these versions of the code. If I
> understand NFPA 72, chapter 9 it does not mandate two communications
> paths for all methods of signal transmission. This chapter breaks
> down into sections dealing with different transmission technologies.
> Now, when systems use DACTs, then yes the code specifies that that
> primary method must be a phone line and the secondary path can be a
> phone line or several other alternates methods ( one of which is
> cellular phone, which Tellular models are designed to fulfill).
> However, other sections that deal with other technologies do not
> mandate multiple paths. For instance, in the Chicagoland area many
> municipalities have direct connect (reverse polarity) connections.
> Signals over one set of conductors. AES radios are taking the place
> of these hard-wired connections but, again, they are a single radio
> transmitter using a private network. The Tellular TG-7fs literature
> seems to indicate that it is using standard cellular networks, so
> there must be some change in the code to allow for this.
>
> Regards,
>
> Bill
Way it was described to me
Tellular sends a fault to central if its servers do not see a check in
after so many minutes from unit so it is supervised .
that plus UL has lowered the requirements  realizing dual paths really
mean nothing in digital age if one phone line goes down all will. on
most telco systems these days