Digital Adapter with Automatic Volume Leveller utilizes 2nd generation technology and DSP [digital signal processing] to deliver unsurpassed levels of acoustic protection and exceptional sound quality. Digital Adapter is equipped with automatic volume leveller, which maintains a constant listening volume, regardless of incoming call loudness. The Digital Adapter has the provision of selective frequency-response shaping that maximizes speech intelligibility, whilst phone-line noise is also reduced. Digital Adapter with Automatic Volume Leveller can be availed in different configurations to cater to specific requirement.