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Wideband Audio Performance

The integrated wideband audio performance provides optimum speech quality and a natural tone when PC telephony is used. The HD audio quality lies within the frequency range of 100 Hz to 7,500 Hz in accordance with ETSI ES 202739.


The support of the Hearing-Aid-Compatibility standard (HAC) (in accordance with FCC Part 68.316 and 68.317) ensures that the CT 220 PRO also enables wearers of hearing aids to use the latest communication technology in the age of Unified Communications.

Further acoustic features

  • Acoustic shock protection (in accordance with ETSI EG 202518 and UL60950-1)
  • Echo cancellation
  • Dial tone signal via internal loudspeaker
  • Connection for corded or cordless headset
  • and many more

* These functions can be configured using the API (Application Programming Interface).

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