Command Reference Guide

3Com Router 5000 Family and Router 6000 Family caller-permit ● 23
Command Reference
caller-permit
Purpose Use the caller-permit command to configure the calling numbers that are
permitted to call in.
Use the undo caller-permit command to delete the calling numbers that are
permitted to call in.
Syntax caller-permit calling-string
undo caller-permit { calling-string | all }
Parameters all
All callers.
calling-string
Calling numbers that are permitted to call in, in the
format of { [ + ]
string [ $ ]| $ }. The largest length of
the string is 31. The symbols are described in the
following:
■ +: Appears at the beginning of a calling number to
indicate that the number is E.164-compliant.
■ $: As the last character to indicate the end of the
number. That means the entire calling number must
match all the characters before “$” in the string. If
there is only “$” in the string, the calling number
can be empty.
■ string: A string composed of any characters of
“0123456789ABCD#*.!+%[]()-”. The meanings of
the characters are described in the following table:
Table 1 Meanings of the character string
Character Meaning
0-9 Numbers from 0 to 9. Each means a digit.
ABCD Each character means a digit.
# and * Each means a valid digit.
. A wildcard. It can match any digit of a valid number. For example,
555. . . . matches any string that begins with 555 and with four
additional characters.
! The character or characters right in front of it does not appear or
appears once. For example, 56!1234 can match 51234 and 561234.
+ The character or characters right in front of it appears once or
several times. But its appearance at the beginning of the whole
number means the number is E.164-compliant.
- Hyphen. It connects two values (the smaller one before it and the
bigger one after it) to indicate a range. For example, “1-9” means
numbers from 1 to 9 (inclusive).
% The character or characters right in front of it does not appear, or
appears once or several times.
[ ] Selects one character from the group. For example, [1-36A] can
match only one character among 1, 2, 3, 6, and A.