General FeaturesFeatures Guide 249T1 LineDescriptionThe T1 line is at the bottom of the digital transmission hierarchy.The T1 line contains 24 voice channels. Voice is digitized by Pulse Code Modulation.This feature is available for KX-TD1232 only.Conditions• Hardware RequirementsT1 unit (KX-TD187) and user-supplied certified CSU (Channel Service Unit) are requiredto utilize T1 line with the KX-TD1232 system.• Trunk InterfaceThis card supports five different trunk interfaces to provide desired connection at minimumexpense. One of the following five trunk types can be assigned to one of 24 channels of T1unit individually according to tariffs and customer needs.Trunk types: LCOT, GCOT, DID, OPX, TIE• One T1 unit (24 ports) can be installed in the KX-TD1232 master system. However, itcannot be installed in the KX-TD1232 slave system or KX-TD816 system.• Select the external clock mode, if your system is interfaced by T1 interface with anotherexchange.• When the T1 unit is installed, the outside line numbers are as follows.• Actual number of CO is 32 when you connect the KX-TD187.• Each outside line can be assigned to an outside line group, and it works on assignments ofthe group.• Assigns a name to each outside line. During receiving an outside line call, the outside linename appears on the display.Basic OutsideLine PortNumberOutside LineNumberT1 UnitPort NumberOutside LineNumber12:7812:7812:78:23242526:3132:4748
