591st Busy-line CodeSYS_6_4_[XXYZ]XX: the Type code, which informs the EVM to provide the Busy Phone Service to the caller.YZ: the start of the EXTN field inside a DTMF digit string carrying this Type code01~09 (1~9), 0* (10)= number of digits before the EXTN field.99= enabling the EVM to detect this Type code on sending out an internal phone number.*1 ~ *9 = * indicates that the start of the EXTN field is not fixed but follows a digit of *closely. 1 ~ 9 are used to specify the minimum number of digits (including this *)appearing before the EXTN field.#1 ~ #9, A1 ~ A9, B1 ~ B9 and C1 ~ C9 are similar to the functions of *1 ~ *9.C.O Trunk Group Access CodeSYS_6_5_[X~]X~: the number that EVM dials before an external number or pager number of messagenotification, which is used to seize a trunk connected to the Central Office. (Default empty)MLON CodeSYS_6_6_[X~]X~: the feature code for the operating way specified in SYS_5_7 (Default = empty)MLOFF CodeSYS_6_7_[X~]X~: the feature code for the operating way specified in SYS_5_8 (Default = empty)System PasswordSYS_6_8_[XXXX]XXXX: the password for logging in to the System Program (Default= 0#0#)Administrator PasswordSYS_6_9_[XXXX]XXXX: the password for logging in to the Administration Program (Default= empty) The first two digits of the Administrator Password must not be the same number as the first twodigits of the System Password.Suffix CodeSYS_6_*_[X~]X~: the Suffix code (Default = empty)
