2.4.2 4-SLT Extension Expansion Card /Caller ID / DISA / FAX Detection Card InstallationOne 4-SLT Extension Expansion Card (XX-TD30870) and oneCaller ID / DISA / FAX Detection Card (RX-TD3089 1) can beinstalled to the system.4-SLT Extension Expansion Card adds four extra Device Portextensions to jacks 5 through 8, for a maximum of eight digitalextensions plus eight single line device extensions. The basicconfiguration already supports digital proprietary telephones onjacks 5 through 8.Caller ID / DISA / FAX Detection Card supports the following.Caller ID: Receives the Caller ID Service from the Central Office.A specified standard telephone with Caller ID service candisplay the information. Display proprietary telephones candisplay caller’s information which has been stored in thesystem according to the Caller ID service.Direct Inward System Access (DISA):One of the system features. An outgoing message greets theexternal caller and gives information so that the caller canaccess the extensions directly.Facsimile detection:When the system receives a facsimile transmission signal byDISA, it automatically connects the specified facsimileextension.1. Loosen the screw.f Screw2. Remove the cover by pressing both tabs and lifting up.Installation 2-25