Dialing Plan Features; Digit Mapping - AudioCodes Mediant 800B User Manual

25.1

Dialing Plan Features

This section describes various dialing plan features supported by the device.

25.1.1 Digit Mapping

Digit map pattern rules are used for Tel-to-IP ISDN overlap dialing (by setting the
ISDNRxOverlap parameter to 1) to reduce the dialing period (for digital interface). For more
information on digit maps for ISDN overlapping, see ISDN Overlap Dialing on page 348.
The device collects digits until a match is found in the user-defined digit pattern (e.g., for
closed numbering schemes). The device stops collecting digits and starts sending the
digits (collected number) upon any of the following scenarios:

Maximum number of digits is received. You can define (using the MaxDigits
parameter) the maximum number of collected destination number digits that can be
received (i.e., dialed) from the Tel side by the device. 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.

Inter-digit timeout expires (e.g., for open numbering schemes). This is defined using
the TimeBetweenDigits parameter. 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.

The phone's pound (#) key is pressed.

Digit string (i.e., dialed number) matches one of the patterns defined in the digit map.
Digit map (pattern) rules are defined using the DigitMapping parameter. 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:
Notation
[n-m]
.
x
T
S
User's Manual
Table 25-1: Digit Map Pattern Notations
Range of numbers (not letters).
(single dot) Repeat digits until next notation (e.g., T).
Any single digit.
Note: This notation does not apply to some scenarios when using the star (*)
or hash (#) key. For example, the key sequence of ** must be presented in the
dial plan as *x.s (instead of xx).
Dial timeout (configured by the TimeBetweenDigits parameter).
Short timer (configured by the TimeBetweenDigits parameter; default is two
seconds) that can be used when a specific rule is defined after a more general
rule. For example, if the digit map is 99|998, then the digit collection is
terminated after the first two 9 digits are received. Therefore, the second rule
of 998 can never be matched. But when the digit map is 99s|998, then after
dialing the first two 9 digits, the device waits another two seconds within which
the caller can enter the digit 8.
Mediant 800B Gateway and E-SBC
Description
408 Document #: LTRT-10286