4. Telephonic communications
  5. Supervisory or control line signaling
  6. Substation originated
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Object-oriented programmable dedicated dialer device and method

Telephonic communications – Supervisory or control line signaling – Substation originated
Patent

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One-touch dialing apparatus and method for registering dialing n

Telephonic communications – Supervisory or control line signaling – Substation originated
Patent

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Operating surface for class functions in a telephone

Telephonic communications – Supervisory or control line signaling – Substation originated
Reexamination Certificate

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