First, the parameters must be set for the host system (e.g. Germany):

CHANGE-ZAND:TYPE=ALLDATA,CNTRYCD=0,SIUANN=1;
CHANGE-ZAND:TYPE=TN,SIUC=0,DTR=0,RDS=0,CONFC=0;

Now tones/announcements can be set for an access point for a country with a different companding algorithm (USA):

ADD-UCSU:UNIT=AP,LTG=1,LTU=17,LTPARTNO="Q2323-X ",SRCGRP=17,FRMTYPE=L80XF,
CONNTYPE=APDL,LSRTADDR=198.16.16.63,APRTADDR=198.16.16.150,LOCID=017,
LOCATION="LOCATION",PHONE=3140,FAX=3141,PLCHECK=YES,BCHLCNT=60,CONVLAW=YES,
TCLASS=0,ALARMNO=0,SIUANN=D,SIU=K,DTR=K,CNTRYCD=K;

If the companding algorithm is changed while the access point is already in operation (via CHANGE-UCSU), the access point must first be deactivated (via DEACTIVATE-USSU). Only when you have completed this action will the CONVLAW parameter be considered when changing. Finally, you should reactivate the access point (via ACTIVATE-UCSU).