Question

explain about dtmf frequently. ​

Answer 1

DTMF is widely used for telecommunication signaling between telephone handsets and switching centers over analog telephone lines in voice-frequency bands. DTMF is used in push-button telephones for tone dialing. This version of DTMF is an AT&T registered trademark and is called Touch-Tone

Answer 2

☞ϙᴜᴇsᴛɪᴏɴ:-

╚»ᴇxᴘʟᴀɪɴ ᴀʙᴏᴜᴛ ᴅᴛᴍғ ғʀᴇϙᴜᴇɴᴛʟʏ

☞Answer:-

ȯ

• ғᴜʟʟ ғᴏʀᴍ ᴏғ ᴅᴛᴍғ:-

• ᴅᴜᴀʟ ᴛᴏɴᴇ ᴍᴜʟᴛɪᴘʟᴇ-ғʀᴇϙᴜᴇɴᴄʏ.

• ᴇxᴘʟᴀɪɴᴀᴛɪᴏɴ:-

• ᴅᴜᴀʟ ᴛᴏɴᴇ ᴍᴜʟᴛɪᴘʟᴇ-ғʀᴇϙᴜᴇɴᴄʏ, ᴀʟsᴏ ᴄᴀʟʟᴇᴅ ᴛᴏᴜᴄʜ ᴛᴏɴᴇ. ᴛʜɪs ᴄᴀɴ ʙᴇ ᴀ ᴄᴏᴅᴇ ᴛʜᴀᴛ ɪs ᴜsᴇᴅ ᴛᴏ sᴇɴᴅ ɪɴғᴏʀᴍᴀᴛɪᴏɴ ᴡɪᴛʜ ʀᴀᴅɪᴏ ᴏᴄʜ ᴘʜᴏɴᴇ.
• ᴛʜᴇ ᴛᴏɴᴇs ʏᴏᴜ ʜᴇᴀʀ ᴡʜᴇɴ ᴘʀᴇssɪɴɢ ʙᴜᴛᴛᴏɴs ᴏɴ ᴀ ᴘʜᴏɴᴇ, ɪᴛ ᴅᴛᴍғ. ᴇᴠᴇʀʏ ᴄʟɪᴄᴋ sᴇɴᴅs ᴛᴡᴏ ᴛᴏɴᴇs ᴏɴ ᴛᴡᴏ ᴅɪғғᴇʀᴇɴᴛ ғʀᴇϙᴜᴇɴᴄɪᴇs.