1.21 Integrated Services Digital Network (ISDN) Service FeaturesFeature Guide 2631.21.1.7 Call Transfer (CT)—by ISDNDescriptionAn ISDN call can be transferred to an outside party using the ISDN service of the telephone company,instead of the PBX feature, without occupying a second ISDN line.Conditions• This feature complies with the following European Telecommunication Standard (ETS) specification:– ETS 300 369 Explicit Call Transfer (ECT) supplementary service.• The availability of this feature is dependent on the contract with the telephone company.• This feature can be enabled or disabled on an ISDN port basis.• If an ISDN port is in P-P configuration, this feature can be used only when the network supports the"explicit linkage" option.• Call Transfer with Announcement and Call Transfer without Announcement is possible. (→ 1.12.1 CallTransfer)• The call charges after completing this feature will not be recorded by the PBX.Programming Manual ReferencesPC Programming Manual2.7.14 [1-1] Slot—BRI Port—Supplementary Service—COLP, CLIR, COLR, CNIP, CONP, CNIR, CONR, CF(Rerouting), CT, CCBS, AOC-D, AOC-E, 3PTY2.7.16 [1-1] Slot—PRI Port (KX-TDA100/KX-TDA200/KX-TDA600 only)—Supplementary Service—COLP,CLIR, COLR, CNIP, CONP, CNIR, CONR, CF (Rerouting), CT, CCBS, AOC-D, AOC-E, 3PTYPT Programming ManualNoneUser Manual References1.4.1 Transferring a Call (Call Transfer)