Q: What is Wideband Technology? A: The term refers to the audible frequency range for telephony. Traditional Telephone Systems operate between 300Hz and 3400Hz this is known as Narrow-band. The New Telephone Systems and VoIP can operate between 150Hz and 6800Hz this is known as Wide-band. Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment * Name * Email * Website