Covid 19 Update: Given the current global situation, we have paused the delivery of our LiveOnsite courses, but our LiveOnline and OnlineAnytime Packages remain unaffected. Browse over 50 online courses in our course catalogue, or get in touch to register your interest in future LiveOnsite courses when we are able to safely resume in person training.

VF - Voice Frequency

Pertaining to those frequencies within that part of the audio range that is used for the transmission of speech. In telephony, the usable voice-frequency band ranges from approximately 300Hz to 3400Hz (3.1KHz bandwidth).


  • Fully interactive 3GPP based network map
  • Narrated call flows
  • Detailed network procedures

Explore NetX today with a
free trial.
More Info about NetX