Aastra Dialog 4000 digital telephones combine excel­lent sound quality and outstanding features with superior ergonomics. Users also benefit from built-in acoustic shock protection and hearing-impaired sup­port. Dialog phones are highly appreciated in everyday use because of their excellent quality and multiple functions. Environmentally sound design has been a cornerstone in developing the Dialog 4000. All phones support software downloading for remote upgrades and easy mainte­nance. The Dialog 4000 generation of telephones leads the way into the future for enterprise communications.