[Asterisk-Users] Vonage, PSTN, 911, and hardware question

[Henry Devito]

I have this fail over setup on my * server at home. I bought a $5 case fan
that plugged into a power socket on my power supply and just cut the fan
off.  I then connected this to a 12VDC DPDT relay and it worked fine.  I
used this relay
http://www.radioshack.com/product.asp?cookie%5Ftest=1&catalog_name=CTLG&cate
gory_name=CTLG_010_008_005_000&product_id=275-218

It was $8.39

This relay has contacts that can handle 10A 120 VAC.  You want a relay that
can handle up to at least 105 VAC.  Ring voltage on a POTS line is anywhere
from 90-105VAC.

 

-----Original Message-----
From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Rajeev Sharma
Sent: Sunday, October 10, 2004 10:09 AM
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: Re: [Asterisk-Users] Vonage, PSTN, 911, and hardware question

Yeah, thanks, I was thinking of doing something similar to that. Actually, I
was gonna spice a cable 
in my computer's power supply and use that. Why? Because if it's on a UPS,
then the switch will 
throw at the same time as the computer looses off. I dunno, I might not even
use a UPS, just a surge 
protector, but I'll see. Thanks for the idea.

Greg Hill wrote:
> On Sun, 10 Oct 2004, Rajeev Sharma wrote:
> 
> 
>>Anyway, that double-pole-double-throw relay looks like just the right
thing. If I'm understanding
>>right, the relay design that Henry Devito sent me is the exact same thing
as the Viking PF-6A. So,
>>has anyone had experience with these things? Are they easy to build? (This
is a home project, so
>>things don't have to be professional.) Any tips? Right now I'm thinking of
trying to build something
>>out of this $1.25 12VDC relay (I believe Henry said it had to be 12V):
>>http://www.allelectronics.com/cgi-bin/category.cgi?category=500&item=RLY-8
7&type=store
> 
> 
> I can't find any datasheet for that part anywhere.. Anyway, any DPDT relay
> would work. You'll need a power source suitable for the coil's rating
> (voltage) on the relay. It's probably better, actually, if you dig around
> in your junk computer parts for an orphan wall-wart power adapter. When
> you find one, see what its output voltage is (find one with a DC output).
> Then get a DPDT relay with a coil voltage to match. Wire the wall-wart
> directly to the coil terminals and plug it in. (before doing so, maybe
> wire on the phone connectors as well)
> 
> Greg
> 
> 
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