AASTRA 7147a - for MX-ONE EN - Manual (Page 26)

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Set password
A 4 digits combination password can be set to the phone in order to lock
some critical parameters settings and speed dial memories from changing
by unauthorized users.
Change password
1. During On-hook, press [ save] + [#]+[0]+[5]+[#]+[XXXX]+[#]
+[YYYY]+[#]+[YYYY]+[#].
2. [ XXXX] is the old password; [ YYYY] is the new password. (Default
0000)
The saved new password will be asked for only when the phone is locked
To lock the phone
1. During On-hook, press [save]+[XXXX]+[#] (XXXX is the set password)
To unlock the phone
1. During On-hook, press [delete]+[XXXX]+[#] (XXXX is the set password)
Set time and date
1. In idle state, press [save] for 3 seconds to enter the time/date setting
mode
2. Enter the number for HH:MM DD/MM (or MM/DD depends on the date
format selected). For example, 17:30 28/06, press
[1]+[7]+[3]+[0]+[2]+[8]+[0]+[6]. The corresponding digit of time/date icon
flashes to indicate which digit is being entered.
Set Ring Melody
1. During On-hook, press [save]+[#]+[0]+[2]+[#]+[X]+[#].
2. X could be set from 1 to 8 (melodies 1~8).
LCD Contrast
1. During On-hook, press [save]+[#]+[0]+[3]+[#]+[X]+[#]
2. X could be set from 1 to 4 (Level 1~4).