4. Telephonic communications
  5. Reception of calling information at substation in wireline...
  6. Blocking caller id transmission

Colonial Data Technologies Corp.

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Method and apparatus for detecting a telephone CPE alerting sign

Telephonic communications – Reception of calling information at substation in wireline... – Blocking caller id transmission
Patent

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Method and apparatus for processing an incoming telephone call s

Telephonic communications – Supervisory or control line signaling – Signal reception at substation
Patent

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