Extended call-back rules enable you base a call-back rule on a specified pattern sequence of result codes. This is in contrast to a "standard" call-back rule which is based on the number of occurrences of a single specified result code. Furthermore, you can optionally configure the call-back rule to change the Case Result of the case, and you can make this conditional on its current Case Result.
Note: The use of Extended Call-back rules is optional. When no extended call-back rule exists or is applicable, the Standard Call-back rules are used.
The Extended Call-back rules table is similar to the standard table except that the first three columns are different: New Case Result, Current Case Result, and Sequence of Result Codes.
New Case Result: An optional INT code, that replaces the Current Case Result code, if the rule applies.
Current Case Result: An optional INT code – (or a list of equivalent codes) indicating the Case Result that must exist for the rule to apply.
Sequence of result codes: A string of result codes (respecting a simple syntax) for the rule to apply.
The sequence is evaluated in this order:
From right to left. A rule is evaluated only if the most recent series of call results matches the sequence of call results specified for this rule.
From top to bottom. The rule applied is the first one which matches the sequence of call result codes for the case.
When no extended rule applies, the standard call-back rules will be used.
Note: For more detail see standard Call-back rules
An extended rule comprises a sequence of result codes (separated by spaces), each of which can be specified in one of three ways:
|
Code |
Explanation |
Example |
|
Single INT code |
This code must be present for the callback rule to apply. |
BU |
|
* |
A wild card representing a sequence of codes (including "no call result"). It may not appear as the last element in the list. |
* |
|
[Equivalent INT codes] |
Any one of the codes within the square brackets. |
[AM NA P1 P6] |
|
New |
Current |
Result Sequence |
Description |
|
|
|
AP BU BU BU |
Code AP followed by BU 3 times in succession Examples where the rule applies: BU BU AP BU BU BU AP AP BU BU BU Examples where the rules does not apply: BU BU BU BU AP AP CO BU BU BU |
|
|
|
[AP AC] BU BU BU |
Code AP or AC followed by BU 3 times in succession Examples where the rule applies: BU AC BU BU BU AP AP BU BU BU Examples where the rules does not apply: BU BU BU BU AP AP CO BU BU BU |
|
|
|
[AP AC] * BU BU BU |
Code AP or AC followed by any code(s), and then followed by BU 3 times in succession |
|
DE |
|
[P1 P6 AM] [P1 P6 AM] [P1 P6 AM] |
Code P1, P6 or AM 3 times in succession The Case Result becomes DE |
|
RF |
|
RE * RE * RE |
Code RE 3 times but not necessarily in succession The Case Result becomes RF |
|
RF |
EL |
RE * RE * RE |
The same as the previous example, but applies only if the case’s Current Case Result is EL |