Analyzing Dialed Digits

A number analysis is carried out for each digit in order to identify the type of the dialed number. Depending on the system line user type, the addressing digits are either received one by one (for example, at manual dialing) or in a group (for example, when a name selection button on a telephone is used).

There are different types of analysis to decide whether a number is correct or not. These types correspond to different number types and are stored in different link tree structures.