The first two field must contain a valid routing code (see AMO WABE). Wildcards can therefore not be used in the first field of the digit pattern. In the second field the wildcards will be truncated, and the checks will be done without the evaluation of them. Every LCR digit pattern can be assigned to a specific DPLN group (parameter DPLN). Routing codes can have a maximum of 6 digits. The other digits can be divided into fields as required. The LCR digit pattern may not exceed 22 digits in length.
All LCR authorizations levels (specified in parameter LAUTH) are assigned to each DPLN group of a digit pattern when specified in parameter DPLN. If parameter DPLN is not specified an LCR authorization level is assigned to the whole DPLN group. Therefore LCR digit patterns can be enabled or disabled for specific users within the same DPLN group. This pattern can be dialed successfully only by the users in the DPLN group who have this LCR authorization in their active LCR class of service (AMO COSSU, parameter LCOS).
A serial pulse counter can also be assigned to the LCR digit pattern (parameter SPC). The serial pulse counter specifies how many characters in a pulse are evaluated if the end of the LCRT digit pattern is open (wildcard Z). The default value of parameter SPC is the same as the maximum number of digits, i.e. 22.