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I am getting an increasing number of these malicious calls that seem to high-jack my Cox Telephone service. I am subjected to a very loud harassing alarm sound throughout my house from my answering machine and my three hand sets. This must be an FCC violation. Please use the following URL to listen to the last one I recorded from my answering machine.
Please advise on how I can stop this.
If you are currently subscribed to selective call rejection, you can block that call from getting in.
Allan - Cox Support Forums Moderator
I have tried to do so by using the *60 #01# on my telephone dial pad but since the call ID is unknown that does not work. Were you able to listen to the .mp4 recording of the call that I posted the link to? It sounds like something more than just the annoying sound is going on with these calls.
firstname.lastname@example.org said:Maybe their term 'c.o.d.' was 'c.p.d', "calling party disconnect". Same concept applies, though.
Best guess I have is "Open Switch Interval support to enhance answering machine compatibility" as per seen on the DPQ3212 specs. Or maybe COD short for CODEC?
"Open switch interval" sounds about right, 'codec' usually refers to a coder-decoder for converting from analog to digital.
The 'open switch interval' would basically put 0 volts on the line for a short interval, just as a shunt or short would do.
That makes sense. Could the ring tone being trapezoidal have any effect? I think there are a bunch of settings Cox has access to with phone modems, but you have to know the right button to press inside their diagnostic tool. Since Tier 1 no longer has access to that tool, many people probably don't even know they are there. Small miracle you got someone who did. Congrats!
Trapezoidal ring tone...? Never heard that term.
email@example.com said:Trapezoidal ring tone...?
Yea, I am not too familar with what it does either. Just bumped into the term while googling around and it looked interesting.
""A square wave (which is cheaper to make electronically), the voltage goes straight up to the maximum positive voltage, stays at that voltage for the duration of that part of the cycle, and then goes straight down to the maximum negative voltage (see chart below). On a square wave, the line going from positive to negative is usually vertical, as opposed to sloping on a sine wave.Some real bells (ringers) have a problem with square waves, so some manufacturers shape the waves into trapezoids (with extra electronic components) to improve how their device works with real bells, and to reduce some of the noise that can be generated by using a square wave (see the chart below). Most electronic ringers work fine with a square wave." - As seen here.