TELECOM Digest OnLine - Sorted: Re: Packet8 DTMF Tones Sound "Clipped"

Re: Packet8 DTMF Tones Sound "Clipped"

Ken Abrams (k_abrams@[REMOVETHIS])
Tue, 24 May 2005 01:22:01 GMT

<> wrote

> One of my customers is using the Packet8 Virtual Office, and when my
> computer calls him to deliver the messages, he cannot navigate via
> DTMF. I hooked up a line analyzer and listened to the call, and all
> I'm hearing on my end is a "blip blip blip" as he repeatedly presses
> the key to save the message. The DTMF tone basically sounds like it
> was clipped at just a few milliseconds ... in fact, I really cannot
> discern if it's still a dual frequency tone or not.

I have no knowledge of Packet8 so this is just a wild guess. Based on
your description, it sounds like the DTMF pad (phone) in use is
polarity sensitive and the battery to the phone is reversed on an
incoming call, thereby disabling the generation of DTMF tones. Simply
replacing the phone might solve the problem. The "original"
touch-tone phones were all polarity sensitive; AFAIK, none of the
modern ones are.

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