Chapter 2. Installation3 6 TSU 120 User Manual 61200.129L1-1TSU 120PC or ModemControlInputChainOutputTSU 120ChainInChainOutputTSU 120ChainInChainOutputFigure 2-1Example of Chain InAt this point, the Unit Initialization procedure isconcluded. If the unit is to be configured remotely,there are no additional items necessary to completeprior to executing remote configuration.The Passcode, the Unit ID, and the Control Port settingsare stored in a nonvolatile memory. This assures they areoperable for subsequent power-up sequences.