<p>A telephone subset is provided with a plug-in module which includes software in memory (12) to enable the subset to access exchange based facilities such as call divert and calling line identification. The subset includes signalling circuitry (9) controlled by a microprocessor (3) in response to the software to communicate with the exchange. The microprocessor also controls an LCD (7) to display messages in the software to guide the user of the subset in accessing the exchange based facilities. The LCD includes labelled displays to provide a continuous display indicating which facilities are activated. The modules are interchangeable to permit access to new facilities at the exchange. <IMAGE></p>
申请公布号
EP0542049(A2)
申请公布日期
1993.05.19
申请号
EP19920118485
申请日期
1992.10.29
申请人
ALCATEL N.V.;ALCATEL AUSTRALIA LIMITED
发明人
FOWLER, ROSS;CROWE, KEVIN ANTHONY;LAGOS, JOHN;LEECE, PHIL