MAINTx.SYS (\FBB\SYSTEM). This file is in the SYSTEM directory. This works exactly like INITTNCx.SYS, but the parametres are sent to the TNC when the BBS is shut down. The file can look like this: Y 1 U 1 BBS ($c) was shut down for service $d $T. Y 1 means that only 1 station can connect my TNC now. U 1 means that the TNC will send this message to any user that connects after the BBS has shut down. If you use a PK-232, the same file would look like this: UR1 CTBBS ($c) was shut down for service $d $T. The commands sent to the TNC, are the commands described in the documentation for the firmware you use, or in the documentation for PK-232, DRSI, BPQ , KAM etc.