Statements (23)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
gptkb:smartphone
|
| gptkbp:enables |
automated services
faster dialing |
| gptkbp:has_button_count |
12
16 |
| gptkbp:has_frequency_pairs |
low and high frequency tones
|
| gptkbp:has_inventor |
gptkb:Bell_Telephone_Laboratories
|
| gptkbp:hasFeature |
gptkb:ANSI_T1.401
gptkb:ITU-T_Recommendation_Q.23 numeric keypad push-button dialing |
| gptkbp:hasPatent |
gptkb:US3052874A
|
| gptkbp:introduced |
gptkb:Bell_System
1963 |
| gptkbp:marketedAs |
gptkb:Touch-Tone
|
| gptkbp:replaced_technology |
rotary dial telephone
|
| gptkbp:technology |
dual-tone multi-frequency signaling
|
| gptkbp:used_in |
gptkb:public_switched_telephone_network
|
| gptkbp:usedFor |
gptkb:telecommunications_company
telephone signaling |
| gptkbp:bfsParent |
gptkb:1964_New_York_World's_Fair
|
| gptkbp:bfsLayer |
5
|
| https://www.w3.org/2000/01/rdf-schema#label |
Touch-tone telephone
|