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This attributes also includes:
• Digit Map <digitmap/>
• Routing <routing/>
Digit Map <digitmap/>
A digit map is defined either by a “string” or by a list of strings. Each string in
the list is an alternative numbering scheme, specified either as a set of digits or
timers, or as an expression over which the gateway will attempt to find a
shortest possible match.
Digit map extension letter “R” indicates that certain matched strings are
replaced. The following examples shows the semantics of the syntax:
•
R9RRxxxxxxx
—Remove 9 at the beginning of the dialed number
— For example, if a customer dials 914539400, the first 9 is removed
when the call is placed.
•
RR604Rxxxxxxx
—Prepend 604 to all 7 digit numbers
— For example, if a customer dials 4539400, 604 is added to the front of
the number, so a call 6044539400 is placed.
•
R9R604Rxxxxxxx
—Replaces 9 with 604
•
R999R911R
—Convert 999 to 911
•
xxR601R600Rxx
—When applied on 1160122 gives 1160022
•
xR60xR600Rxxxxxxx
—Any 60x will be replaced with 600 in the middle of
the dialed number that matches
— For example, if a customer dials 16092345678, a call is placed to
16002345678.
• 911xxx.T— A period (".") which matches an arbitrary number, including
zero, of occurrences of the preceding construct
— For example:
91112 with waiting time to comply with T is a match
911123 with waiting time to comply with T is a match
9111234 with waiting time to comply with T is a match
and the number can grow indefinitely given that pressing the next
digit takes less than T.
The following guidelines should be noted:
• You must use only *, #, or 0-9 between second and third R
• If a digit map does not comply, it is not included in the digit plan as a valid
one. That is, no matching is done against it.