telephones.The Panasonic KX-TDE IP PBX series are advanced communications platforms for IP networking environments, supporting SIP connectivity for desktops and networks. The system support a range of advanced IPtelephones, as well as the standard digital & analogue extensions, Digital and ISDN trunks. Couple this with a Business Application environment, and you have a system ready to take your business communication needs into the 21st Century, at your own pace.