Dual-tone multi-frequency signaling
GPTKB entity
Statements (41)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
Telecommunications signaling system
|
| gptkbp:abbreviation |
gptkb:DTMF
|
| gptkbp:alternativeTo |
Pulse dialing
|
| gptkbp:category |
Telecommunications
Signaling protocols Telephone technology |
| gptkbp:consistsOf |
High-frequency group
Low-frequency group |
| gptkbp:developedBy |
gptkb:Bell_System
|
| gptkbp:eachKeyRepresents |
Combination of two tones
|
| gptkbp:frequency |
697 Hz to 1633 Hz
|
| gptkbp:hasTones |
8
|
| https://www.w3.org/2000/01/rdf-schema#label |
Dual-tone multi-frequency signaling
|
| gptkbp:introducedIn |
1963
|
| gptkbp:ITU-TRecommendation |
Q.23
|
| gptkbp:numberOfKeys |
16
|
| gptkbp:relatedTo |
gptkb:Signaling_System_No._5
Keypad Telephone exchange Telephone network MF signaling |
| gptkbp:replacedBy |
Rotary dial signaling
|
| gptkbp:standardizedBy |
gptkb:ITU-T
|
| gptkbp:type |
In-band signaling
|
| gptkbp:usedFor |
gptkb:remote_control
Alarm systems Telephone banking Amateur radio autopatch Interactive voice response Paging systems Teleconferencing Telephone dialing Voice mail systems |
| gptkbp:usedIn |
Security systems
Radio communications Telephone systems Touch-tone telephones |
| gptkbp:uses |
Keypad
Voice-frequency tones |
| gptkbp:bfsParent |
gptkb:Telephone
|
| gptkbp:bfsLayer |
4
|