nortel voip and cisco phones

The Cisco SIP IP Phone software allows businesses and service providers to use the Cisco 7940 and 7960 IP Phone platforms in any standard SIP network. The SIP software provides for both on-board traditional desktop services such as Caller-ID, Call Hold, Call Transfer, 3-Way Calling, and Call Waiting as well as an XML interface to allow for enhanced web based services. The XML interface allows the phone to transcend the traditional phone paradigm and become a true internet appliance. By supporting web browsing type functionality as well as allowing for application developers to directly control the user interaction on the phone and integrate tightly with the Cisco SIP phone, the Cisco SIP phone is a key enabler of enhanced and rapid application deployment in any SIP customer's network