5.18.3.2. Counter When Retrieving the A-Number (Terminating Seizure) 
There are countries that acknowledge each A-5 with the II signal (category).
But it is assumed that the 1st A-5 acknowledges with the station category
and that other A-5s acknowledge with the A number. To prevent endless
loops in this (incorrect) case (identification sent with A-5 to I-15),
you should limit the number of A-5s that are sent.
- Change the MFC table (MFCTA) as follows:
CHANGE-MFCTA:MFCVAR=x,TYPE=MFCVAR,OPT=SUPERV,MAXDGTS=15;
IMPORTANT:
If you set MAXDGTS=0, there is no monitoring of the digit signals during identification. The number of signals is not explicitly monitored during a generated seizure. Therefore you must configure the table correctly (see above).