Digit Mapping - AudioCodes Mediant 3000 User Manual

SIP User's Manual
For example, assume that you want to manipulate an incoming IP call with destination
number +5492028888888 (area code 202 and phone number 8888888) to the number
0202158888888. To perform such a manipulation, the following configuration is required in
the Number Manipulation table:
1. The following notation is used in the 'Prefix to Add' field:
0[5,3]15
where,
•
0 is the number to add at the beginning of the original destination number.
•
[5,3] denotes a string that is located after (and including) the fifth character (i.e.,
the first '2' in the example) of the original destination number, and its length being
three digits (i.e., the area code 202, in the example).
•
15 is the number to add immediately after the string denoted by [5,3] - in other
words, 15 is added after (i.e. to the right of) the digits 202.
2. The first seven digits from the left are removed from the original number, by entering
"7" in the 'Stripped Digits From Left' field.
In this configuration, the following manipulation process occurs: 1) the prefix is calculated,
020215 in the example; 2) the first seven digits from the left are removed from the original
number, in the example, the number is changed to 8888888; 3) the prefix that was
previously calculated is then added.
9.1.2

Digit Mapping

Digit map pattern rules are used for Tel-to-IP ISDN overlap dialing. 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
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:
Maximum number of digits is received.
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.
Digit map (pattern) rules are defined by the parameter DigitMapping. This is used to reduce
the dialing period for ISDN Overlap dialing (ISDNRxOverlap is set to 1). 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.
Version 5.8
Figure 9-1: Prefix to Add Field with Notation
449
9. IP Telephony Capabilities
September 2009