Version 5.8 453 October 2009
SIP User's Manual 9. IP Telephony Capabilities
9.1.2 Digit Mapping
The device collects digits until a match is found in the user-defined digit pattern (e.g., for
closed numbering schemes) or until a timer expires (e.g., for open numbering schemes). If
a match is found (or the timer expires), the digit collection process is terminated.
The maximum number (up to 49) of collected destination number digits that can be received
(i.e., dialed) from the Tel side by the device can be defined (using the parameter
MaxDigits). When the number of collected digits reaches the maximum (or a digit map
pattern is matched), the device uses these digits for the called destination number.
Dialing ends (and the device starts sending the digits) when any of the following scenarios
occur:
îš„ Maximum number of digits is received.
îš„ Inter-digit timeout expires (up to 10 seconds). This is defined by using the parameter
TimeBetweenDigits. This is the time that the device waits between each received digit.
When this inter-digit timeout expires, the device uses the collected digits to dial the
called destination number.
îš„ Pound (#) key is pressed.
îš„ Digit map pattern is matched.
Digit map (pattern) rules are defined by the parameter DigitMapping. If the digit string (i.e.,
dialed number) matches one of the patterns in the digit map, the device stops collecting
digits and establishes a call with the collected number.
The digit map pattern can contain up to 52 options (rules), each separated by a vertical bar
(|). The maximum length of the entire digit pattern is 152 characters. The available
notations are described in the table below:
Table 9-2: Digit Map Pattern Notations
Notation Description
[n-m]
Range of numbers (not letters).
.
(single dot) Repeat digits until next notation (e.g., T).
x
Any single digit.
T
Dial timeout (configured by the parameter TimeBetweenDigits).
S
Immediately applies a specific rule that is part of a general rule. For example,
if a digit map includes a general rule 'x.T' and a specific rule '11x', for the
specific rule to take precedence over the general rule, append 'S' to the
specific rule (i.e., '11xS').
Below is an example of a digit map pattern containing eight rules:
DigitMapping = 11xS|00[1-
7]xxx|8xxxxxxx|#xxxxxxx|*xx|91xxxxxxxxxx|9011x|x.T
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