Telephony is Narrowband

• Bandwidth in Telephone Channels is Narrow

  • A radio channel would have to be from 0 to 3.4 kHz (3.4 kHz)
  • This would mean a maximum possible transmission speed of about 35 kbps

20 kHz

300 Hz

3.4 kHz

3.1 kHz

Error in Book

Required Radio Channel

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