Wudd
From Zenitel Wiki
The WUDD command is used in the Event Handler to write a value to UDD (User Defined Data variable). The value is changed immediately, before the next statement is executed. The WUDD command can only be used to change values in local exchange.
Syntax
WUDD index value
Write value to UDD at the location index. Index = 0 - 6000
Example
wudd 8 4321 - Write value 4321 to variable 8