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2. Caller ID - Wikipedia

   en.wikipedia.org/wiki/Caller_ID

   Caller-ID system response sounds in various cases: analog, ISDN and digital PBX Caller identification (Caller ID) is a telephone service, available in analog and digital telephone systems, including voice over IP (VoIP), that transmits a caller's telephone number to the called party's telephone equipment when the call is being set up.

3. Vertical service code - Wikipedia

   en.wikipedia.org/wiki/Vertical_service_code

   As CLASS was an AT&T trademark, the term vertical service code was adopted by the North American Numbering Plan Administration. The use of vertical is a somewhat dated reference to older switching methods and the fact that these services can only be accessed by a telephone subscriber, going up ( vertically ) inside the local central office ...

4. Automatic number identification - Wikipedia

   en.wikipedia.org/wiki/Automatic_number...

   ANI is conceptually and technically different from caller ID service. [1] A caller's telephone number and line type are captured by ANI service even if caller ID blocking is activated. The destination telephone company switching office can relay the originating telephone number to ANI delivery services subscribers.

5. Trimline telephone - Wikipedia

   en.wikipedia.org/wiki/Trimline_telephone

   A 220 Trimline rotary desk phone, showing the innovative rotary dial with moving fingerstop Early Touch Tone Trimline with round buttons and clear plastic backplate and round non-modular handset cord Redesigned touch-tone desk model Trimline, manufactured on January 9, 1985 The Trimline 2225, one of the last phones made at the Indianapolis Works in 1986 Early foreign made Trimline, December ...

6. AT&T Communications - Wikipedia

   en.wikipedia.org/wiki/AT&T_Communications

   Customers who subscribe to both AT&T Phone and U-verse TV get features such as call history on channel 9900, which displays the last 100 missed and answered calls on the customer's TV, and "Click to Call" from the TV history. AT&T Phone includes Caller ID, Call Blocking, Anonymous Call Blocker, and many other calling features. AT&T Phone was ...

7. Timeline of the telephone - Wikipedia

   en.wikipedia.org/wiki/Timeline_of_the_telephone

   1982: Caller ID patented by Carolyn Doughty, Bell Labs; 1983: last manual telephone switchboard in Maine is retired; 1984: AT&T completes the divestiture of its local operating companies. This forms a new AT&T (long-distance service and equipment sales) and the Baby Bells. 1987: ADSL introduced