[Asterisk-Users] Ouch, part reset, quickly

[Lyle Giese]

No the card does not have to ring 20 phones at the same time.  At least in
North America, the ring cycle is 6 seconds, 2 seconds on, 4 seconds off.
Stagger the ON between the ports, you can divide the 4 ports by three and
you really only have at the most two ports ringing at once or 10 phones.

I think this error message says the ringing load was too high.  Like the
ring is grounded(or high resistance short to ground).  Not enough to draw
dialtone, but enough to overload ringing or trip the ringing when it's
applied.

Lyle

----- Original Message ----- 
From: "Jim Van Meggelen" <jim at vanmeggelen.ca>
To: "'Asterisk Users Mailing List - Non-Commercial Discussion'"
<asterisk-users at lists.digium.com>
Sent: Tuesday, December 21, 2004 11:28 PM
Subject: RE: [Asterisk-Users] Ouch, part reset, quickly


> asterisk-users-bounces at lists.digium.com wrote:
> >> On December 21, 2004 08:29 am, Jim Van Meggelen wrote:
> >>> 5 Watts per FXS
> >>>
> >>> They also told me each FXS port would support a REN (ringer
> >>> equivalence number) of 5.0, which means that you should be able to
> >>> to ring five of the old electromechanical telephones simultaneously
> >>> off of each FXS port on the card - 20 of them in all.
> >>>
> >>> Does anybody know what the wattage is for a REN?
> >>
> >> Well given what you just provided, I'd say the "wattage for a REN"
> >> is 1 Watt, minus whatever the card itself uses which would be
> >> minimal.  :-)
> >
> > REN really only applies to the old style ringers. The newer
> > electronic ones are basically sensors only, and as such, are waaaay
> > lower then that.
>
> I know it. But if an FXO says it can provide 5 REN, then it has to be
> able to handle 5 of those 2500 sets, yes? And since the TDM400 has 4
> ports, that means that you should be able to drive 20 electromechanical
> ringers simultaneously off one card, yes?
>
> I know, I'm a sadist - who would really want to do that? But if it says
> REN 5 _per_FXS_port_, then I have this burning desire to know (yes,
> Rich, I'm the kid who stuck my finger in the electrical socket because I
> just _had_ to know -- did it twice, as a matter of fact).
>
> And then I contemplate getting twenty 2500 sets (what's that, about
> 400lbs?) and connecting them up to my precious lab system, sending
> ringing to all of 'em, and either smelling smoke, or causing everyone to
> think the fire alarm is going off!
>
> And . . . success or failure, what exactly have I achieved?
>
> It's all academic, and slightly masochistic . . .
>
>
> -- 
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