Modern cellphones also do not use DTMF for dialing, as they are purely digital systems. The entire phone number to call is stored and sent to the cell towerbase stationas part of the dialing process, and therefore, DTMF tones are not used. Once connected though, cellphones can generate DT...
DTMF tones are an example of anin-band signaling protocol; that is, signals are sent over the same communications channel as the primary data on that channel. For DTMF tones that means that tones are in the same frequency range as human voice - any DTMF tones produced can be heard over ...
On a 3845 running 12.4 20, the DTMF tones (for menu options) are not getting passed from the PSTN into the network after the call is established. The router is using CUBE software and passes the call to the PSTN via SIP trunking/SIP server. The call is establishe...
All these tasks will be conducted on our prototype system, using voice, DTMF tones, and possibly text messages. At the end of the study participants willfill out a 15-item questionnaire that covers attitudes towards the system, including its ease of use and their satisfaction with it. The ...
My friend has two touch phones ; both pick up her radio. Fortunately she has a very old pulse dialing phone which is unaffected. Has this phenomena been noted before? Byanon28250— On Mar 13, 2009 "By 1979, the touch tone phone was definitely the telephone of choice" ...