21.9.1. Deleting All Devices Assigned a Station Number at the IP
Port 
To delete all devices that are assigned a station number, enter (the
optional OFFTYPE parameter with its default setting DC=“deactivate
with camp-on“ takes over the mandatory task of disabling the terminals
prior to deletion; this would otherwise be performed with the AMO DSSU):
DEL-SBCSU:STNO=number,SVC=ALL[,OFFTYPE=DI];
IMPORTANT:
You can only delete the device with the main station
number if there are no other devices configured under a secondary station
number.