OfficeServ 7400 Installation Manual© SAMSUNG Electronics Co., Ltd. 8-38.3 Numbering Extensions and C.O. LinesOnce the OfficeServ 7400 system is booted, the MP40/LP40 board verifies the boardsmounted on each slot and saves this information as the default configuration of the system.According to the setting of the S2 switches(SW6, SW7 and SW8) of the MP40 board, theOfficeServ SME system assigns 3 or 4 digits to C.O. lines, extensions, and extension groups.Refer to ‘3.2 Mounting Control Boards’ of this manual for details on setting the S2 switch.C.O. line numbers from 701 or 7001 are sequentially assigned to the C.O. line boardmounted on Slot 1 of the basic cabinet, and following numbers are continuously assignedto the next board of the next slot. This numbering process continues until the C.O. linenumbers are assigned to all C.O. lines. However, only the numbers from 701 to 799 areassigned when using 3 digits. For example, if a 8TRK board is mounted on Slot 1 and a8TRK board is mounted on Slot 2, 701 is assigned to the C1/S1/P1 port and 712 is assignedto the C1/S2/P4 port.(The 12th C.O. line is assigned to the 4th port of the 2nd slot of the 1stcabinet.)Extension numbers from 201 or 2001 are sequentially assigned to the extension boardmounted on Slot 1 of the basic cabinet, and following numbers are continuously assignedto the next extension board of the next slot. This numbering process continues until theextension numbers are assigned to all extensions. However, only the numbers from 201 to349 are assigned when using 3 digits.The last port of the first 8DLI or 16DLI board is assigned to the attendant group as default.All C.O. lines ring this attendant extension unless the default value is changed. Thus, aphone with an LCD panel should be connected to the last port of the first 8DLI board.Numbers between 500-549 or 5001-5049 are assigned to an extension group.The numbers of C.O. lines, extensions, or extension groups can be changed using the MMC724 program.