Supporting a wide range of digital, analog and VoIP phones, the KX-TDE system can be configured individually, based on a customer's requirements. It combines traditional TDM and current VoIP technology targeting medium-sized businesses and existing KX-TDA users can migrate to a KX-TDE system by simply exchanging their main processor card for a new IPMPR. And, a KX-TDE system protects a customer's investment and offers the choice of upgrading to IP technology at any time.