| ??? 08/20/04 12:08 Read: times |
#76201 - OT: DTMF over GSM Responding to: ???'s previous message |
Damjan Lapuh said:
At first my plan was to exchange data by two-way DTMF Just for the record, in case anyone else later looks at this, DTMF does not work over GSM! This is due to the nature of the GSM Voice CODEC - it is specifically designed for the human voice and does not faithfully transmit DTMF. When you press the buttons on your GSM handset during a call, this goes in the Signalling channel - it does not generate in-band DTMF; the actual DTMF tones are generated in the network. |
| Topic | Author | Date |
| data exchange over GPRS | 01/01/70 00:00 | |
| RE: data exchange over GPRS | 01/01/70 00:00 | |
| RE: data exchange over GPRS | 01/01/70 00:00 | |
| OT: DTMF over GSM | 01/01/70 00:00 | |
| RE: OT: DTMF over GSM | 01/01/70 00:00 | |
| RE: OT: DTMF over GSM | 01/01/70 00:00 | |
| GPRS Worries | 01/01/70 00:00 | |
| RE: GPRS Worries | 01/01/70 00:00 | |
| RE: GPRS Worries | 01/01/70 00:00 | |
| RE: Wavecom multiplex mode | 01/01/70 00:00 | |
| DTMF over GSM - further thoughts | 01/01/70 00:00 | |
| RE: DTMF over GSM - further thoughts | 01/01/70 00:00 | |
| RE: DTMF over GSM - AT+VTS | 01/01/70 00:00 | |
| GSM, GPRS Modules | 01/01/70 00:00 | |
| Another thought... | 01/01/70 00:00 | |
| RE: Another thought... | 01/01/70 00:00 | |
RE: Another thought... | 01/01/70 00:00 |