BLuRry

On Sep 2, 1:23*pm, schmidtd <schmi...@my-deja.com> wrote:
> On Sep 2, 1:48*pm, BLuRry <brendan.rob...@gmail.com> wrote:
>
> > Volt meter? *:-) *You can see the voltage reading bounce around on the
> > RX pin when there's data coming over. *If anything, it's the best
> > thing to check that you're not going to blow a serial port elsewhere.
>
> One time, I had a guy tell me he just stuck his tongue against the
> pins to feel for it... I figure I'll use a slightly more sanitary
> method.

Ah yes.. < 12 volts -- but how many amps? ;-)

-B

Scott Alfter

In article <168df099-8813-4e19-8529-a71adb8454f8@i13g2000yqd.googlegroups.com>,
James Littlejohn <narguthru@yahoo.com> wrote:
>On Sep 2, 3:31*pm, BLuRry <brendan.rob...@gmail.com> wrote:
>> On Sep 2, 1:23*pm, schmidtd <schmi...@my-deja.com> wrote:
>>
>> > On Sep 2, 1:48*pm, BLuRry <brendan.rob...@gmail.com> wrote:
>>
>> > > Volt meter? *:-) *You can see the voltage reading bounce around on the
>> > > RX pin when there's data coming over. *If anything, it's the best
>> > > thing to check that you're not going to blow a serial port elsewhere.
>>
>> > One time, I had a guy tell me he just stuck his tongue against the
>> > pins to feel for it... I figure I'll use a slightly more sanitary
>> > method.
>>
>> Ah yes.. < 12 volts -- but how many amps? ;-)
>
>When the phone rings it sends 70A AC through the line.

....and that's on top of the -48VDC present when the phone's on-hook. Plus,
ring voltage is usually closer to 90VAC.

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