Statements (50)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
telecommunications signaling system
|
| gptkbp:alternativeName |
gptkb:Touch-Tone
Tone dialing |
| gptkbp:category |
Telecommunications
Signaling Telephony |
| gptkbp:developedBy |
gptkb:Bell_System
|
| gptkbp:hasFeature |
gptkb:ANSI_T1.401
gptkb:ITU-T_Recommendation_Q.23 |
| gptkbp:hasKeypadLayout |
4x4 matrix
|
| gptkbp:hasKeyword |
2
0 1 3 4 5 6 7 8 9 A B C D * # |
| https://www.w3.org/2000/01/rdf-schema#label |
DTMF
|
| gptkbp:introducedIn |
1963
|
| gptkbp:replacedBy |
pulse dialing
|
| gptkbp:standsFor |
Dual-tone multi-frequency
|
| gptkbp:usedFor |
telephony
touch-tone dialing telephone signaling interactive voice response |
| gptkbp:usedIn |
PBX systems
mobile phones landline telephones |
| gptkbp:uses |
audio frequencies
pairs of tones |
| gptkbp:usesHighFrequencies |
1209 Hz
1336 Hz 1477 Hz 1633 Hz |
| gptkbp:usesLowFrequencies |
697 Hz
770 Hz 852 Hz 941 Hz |
| gptkbp:bfsParent |
gptkb:Dual-tone_multi-frequency_signaling
gptkb:Touch-tone_dialing |
| gptkbp:bfsLayer |
5
|