Chapter Three System Program
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3.38 Head-Digits of Restricted Dial CO Line Number
Format : * 57 M ABCD #
M = Group = 1~ 6
ABCD = Head-digits of restricted dial CO line number
Description: Allows assign head-digits (maximum of 4 digits) of any restricted CO line
number, the CO line numbers that with these assigned head-digits are
restricted to dial.
Example: Assign head-digits 0 and 168 belong to group 1, assign 13 and 9 belong to group 2.
Operating: 1) Lifts extension 8001, unlock system;
2) Input * 57 1 0 # ==> 16 8 # ==> * 57 2 13 # ==> 9 #;
1. Allows assign maximum of twenty restricted head-digits for each group,
when the head-digits is less than 4 digits, please end by #.
2. Groups of restricted dial head-digits (M= 1 ~ 6) are accord to extension
class 1 ~ 6 (refer 3.41);
3. When needs to restrict certain extension to make long-distance call, you
can assign 0 to a group and assign extension class is as same as that group.
Example, assign 0 to group 3, assign extension class is 3, therefore, the
assigned extension is restricted to dial long-distance call.
When needs to restrict certain extension to make international call, you can
assign 00 to a group and assign extension class is as same as that group, so
the assigned extension is restricted to dial international call, but the user can
make national call if head-digit 0 is not restricted.
Above just example, actual assignment must be accord to your local situation.
3.39 Head-Digits of Special (Allowed )Dial CO Line Number
Format : * 57 M ABCD #
M = Group (head-digits of special CO line numbers) = 7 ~ 9
ABCD = Head-digits of allowed dial CO line number
Description: Assign head-digits (max.of 4 digits) of special CO line number, allows to
only dial outside calls with these assigned head-digits, other calls without
these head-digits are restricted.
Example: Assign head-digits 0757 and 010 belong to group 7 ( M =7 ),therefore, the
extension belong to class 7 is allowed only dial outside calls with head-digits
of 0757 and 010. Assign head-digits 200 belong to group 8 ( M =8 ), therefore,
extension belong to class 8 is allowed only dial outside calls with head-digits 200.
Operating: 1) Lifts extension 8001, unlock system;
2) Input * 57 7 0757 # ==> 010 # ==> * 57 8 200 #;
1. Allows assign maximum of twenty special head-digits for each group,
when the head-digits is less than 4 digits, please end by #.
2. Groups of special head-digits (M= 7 ~ 9) are accord to extension class
7 ~ 9 (refer 3.41);
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