Re: Telephone : Checking for "RTS"
- From: "R.Wieser" <address@xxxxxxxxxxxxx>
- Date: Sat, 15 Apr 2006 13:42:40 +0200
John Fields <jfields@xxxxxxxxxxxxxxxxxxxxx> schreef in berichtnieuws
ig2042150nln4l4sqcr67d2n0p51tf45ln@xxxxxxxxxx
Hello John,
On Fri, 14 Apr 2006 14:25:53 +0200, "R.Wieser"
<address@xxxxxxxxxxxxx> wrote:
I'm currently trying to build a Caller-ID (in the Netherlands, meaning
the phone-company uses DTMF to send the CLID).
<snip>
I don't know what you mean by the "A and B" lines, but if it's like
tip and ring is over here, why not connect the IRLEDs from two
optocouplers in anti-parallel and connect that set in series with
either A or B?
Yes, the A and B lines are comparable to "tip" and "ring".
And alas, that method is only good when the phone has been picked up. I
need to know what happens when the phone is still on-hook (before the phone
rings for the first time)
Your suggestion is allready part of my design, so I know when the phone has
been picked up (and tells my controller to interpret eventually incoming
DTMF-signals differently).
Thanks for the suggestion though.
Regards,
Rudy Wieser
.
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