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In-line telephony data protector with line condition announce

  • US 6,556,661 B1
  • Filed: 11/16/2000
  • Issued: 04/29/2003
  • Est. Priority Date: 11/16/1999
  • Status: Expired due to Term
First Claim
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1. An ADSL compatible data protector for telephony test equipment, comprising:

  • (a) a relay for selectively connecting the telephony test equipment to a telecommunication line;

    (b) electronic circuitry, including;

    (i) a detector portion adapted for detecting signals within a continuous band of frequencies present on the telecommunication line; and

    (ii) a microcontroller having a frequency counter function for determining whether data is present on the telecommunication line, a relay connect control function for selectively controlling the relay to connect the telephony test equipment to the telecommunication line, and an alert operator function for producing a signal if the detected frequency is above a predetermined threshold; and

    (c) a ADSL filter connected between the telephony test equipment and the telecommunication line, the ADSL filter being adapted for preventing the telephony test equipment from detrimentally affecting DSL frequencies while enabling POTS frequencies to pass through to the telephony test equipment.

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