Re: HAI Omni LT

["Robert Green" <ROBERT_GREEN1963@xxxxxxxxx>]

"Brett Griffin" <brett@xxxxxxxxxxxxxxxxxxxx> wrote in message

> I really enjoy my MPX-220, it works nicely to interact with my
> home, it is not too big, and syncs with outlook, a great time saver
> with a new phone.  I bought mine unlocked on eBay for $300,
> works on T-Mobile, Cingular, and Sprint I think...

Good, I'll look for one.

"51 items found for MPX-220 in Phones Only"

That's a good selection for Ebay!  They're about $320 unlocked for Buy It
Now so if I wait for auction, I can get it for less.   I want to be able to
check up on the status of the house when travelling, and doing that through
a smartphone seems to be the best option these days.

> > is there any way to use a larger battery?

> I think they recommend a 4A/Hr, I usually use an 8Amp/HR.  You can go
> bigger, that is the size the got the UL approval done with.  If you go too
> big, than you have to get external charger setup, and you need to discuss
> this with Tech Support.

If you made sure a larger battery was fully charged externally and then
hooked it in, I would expect that the trickle charge circuit would keep it
topped off.  I would,  however, expect trouble just hooking one in, though
or after the main battery discharged.  I've got a number of deep discharge
electric wheelchair batteries that were rated at 40AH new, but have lost a
little bit of their pep.  This would be a good use for them.  If 4 AH will
run the panel for a day, 40AH should run it for at least a week.   I guess I
had better figure out where HAI tech support lives and how to access it.

> > On a similar topic, can you tell me why UL regs insist that sounders
draw
> > approximately 2/3 less current than the LT can support?
> UL requires them to operate the system for 24 hours and than operate in an
> alarm state for 4 mins.  They probably chose a amp draw they could satisfy
> the UL requirements with.

Sounds logical to me.  Worthington recommends Elk sounders because of their
very low current draw per decibel of whoop.

> > I still haven't drawn up the diagrams of how the DoorFon will be
> > interconnected with the LT.  If I understood Bruce Robin, it will look
> like
> > this:
>
> This diagram was a little confusing (it is 2am though)  However, ensure
the
> telco is Demarc to DSL Splitter/Filter (if needed) RJ-31x, and then
> Doorphone.  If the door phone is between the HAI and the demarc, than
> conceivably the system could be trying to call central monitoring while
> someone rings the door bell and that would be bad.  The DSL
splitter/filter
> allows one connection for a DSL modem and filters the rest of the house,
if
> you do not filter, most security systems get screwy with the DSL noise...

No DSL - already a RJ31X for the ADT panel in place.  Just nervous there's
going to be an unintended interaction between the LT and DP since I didn't
install the RJ31X and worse, still, the phone line they will be installed on
is not grounded as specified in the HAI manual.

I may have to rethink location of the panel based on which phone line I
choose to connect it to.  When my area switched from 7 to 10 digit dialing
the alarm techs reprogrammed the central number but not the maintenance
number and while I was away, it kept seizing the line to report low battery
but never connecting because it was dialing only 7 digits.  SWMBO was NOT
happy. The people they sent to reprogram it in the first place were probably
flipping burgers the month before.

--
Bobby G.