[Asterisk-Users] POTS fail-over?

[Jay Milk]

You're right -- but I could add a serial interface for remote control
;-)

-----Original Message-----
From: asterisk-users-admin at lists.digium.com
[mailto:asterisk-users-admin at lists.digium.com] On Behalf Of Andrew
Kohlsmith
Sent: Wednesday, April 28, 2004 10:46 AM
To: asterisk-users at lists.digium.com
Subject: Re: [Asterisk-Users] POTS fail-over?


> LOL, sounds like a challenge.  A PIC is only a buck or two, I think I 
> have a couple of zeners to decouple the ringing voltage (which I'd 
> need for analog, too), and programming a PIC is easy.  Oh yeah, and 
> did I mention that my analog circuit expertise is minimmal?

An LM324 is under a dime, a handful of resistors run me pennies and I'd
be 
using the same zeners as you...  

Now what's your time worth to program the PIC?  (And debug said
program.)  The 
circuit complexity's the same for both of us, and I'm assuming you're
using a 
12C series with built-in RC oscillator.

Hell I could really go cheap and use a transistor but now we're just
getting 
silly. :-)  I am willing to bet, however, that the time spent
programming and 
debugging the PIC will be significantly more than it would be to google
for 
"telephone in use circuit" and build the circuit -- the complexities of
the 
actual hardware are about equal.

Regards,
Andrew
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