M 3 Features52Module ExpansionDescription The KX-TD816 starts with 4 CO line and 8 extension jacks.The KX-TD1232 starts with 8 CO line and 16 extension jacks.They can be expanded by installing optional units.• An 8-Station Line Unit adds 8 extension jacks.• A 16-SLT Line Circuit Unit adds 8 extension jacks containingtwo single line telephones.• A 4-CO Line Unit adds 4 CO line jacks.• An E&M (TIE) Line Unit adds 4 E&M (TIE) lines.• An ISDN 2-S0 Line Unit adds 2 ISDN S0 lines.• An ISDN 6-S0 Line Unit adds 6 ISDN S0 lines.• A Primary Rate Interface (PRI) ISDN Expansion Unit adds onePRI ISDN line.The KX-TD816 can have either one 8-Station Line Unit or 16-SLTLine Circuit Unit, and either one 4-CO Line Unit, E&M (TIE) LineUnit, 2-ISDN S0 Line Unit or 6-ISDN S0 Line Unit. The KX-TD1232 can have a maximum of two 8-Station Line Units or 16-SLT Line Circuit Units, and either one 4-CO Line Unit, E&M (TIE)Line Unit, 2-ISDN S0 Line Unit or 6-ISDN S0 Line Unit. OnePrimary Rate Interface (PRI) ISDN Expansion Unit can be installedto the Master system with a 2-ISDN S0 Line Unit or 6-ISDN S0Line Unit, or individually.Conditions • The number of extension jacks may be different from the number oftelephones if the Paralleled Telephone or the eXtra Device port featureis enabled. These features allow one extension jack to have twotelephones.• When an expansion unit is installed, the unit identification is set bySystem Programming.Connection References Section 2, Installation— Installation Manual2.4.2 4-CO Line Unit Connection2.4.3 8-Station Line Unit Connection— Added and Changed Features for Installation Manual and Programming Tables2-ISDN S0 Line Connection— Added and Changed Features for Installation Manual and Programming Tables Vol. 26-ISDN S0 Line Connection— In this manualPrimary Rate Interface ISDN Expansion Unit ConnectionProgramming ReferencesSection 4, System Programming — in this manual[109] Expansion Unit TypeFeature References Section 3, Features — Installation ManualEXtra Device Port (XDP) Paralleled TelephoneOperation Reference Not applicable.