? This manual provides basic information on how you can access commonly used PBX functions withproprietary telephones （PTs）， single line telephones （SLTs）， portable stations （PSs）， and DSS Consoles.For detailed information about each feature or setting， consult your dealer.? In this manual， several kinds of PTs appear， as follows：– IP Proprietary Telephone （IP-PT）– Digital Proprietary Telephone （DPT）– Analogue Proprietary Telephone （APT）– Proprietary Telephone with a Display （Display PT）“PT” is used as a generic term to represent all of these PTs. If a PBX feature only supports specific PTs，such as IP-PTs， the available telephone types are clearly indicated.? IP-PTs may become busy and you may not be able to make or receive calls， depending on the networkstatus.? The contents of this manual apply to PBXs with a certain software version， as indicated on the cover of

　　this manual. To confirm the software version of your PBX， consult your dealer.? Product specifications are subject to change without notic