19.2.3.1. DMC Authorization 
Possible IP endpoints have to be allowed to switch a DMC.This is done
with the following AMO commands:
- IP phones:
CHANGE-SDAT:STNO=<extension number>,TYPE=ATTRIBUT,AATTR=DMCALLWD;
- NCUI:
CHANGE-STMIB:MTYPE=NCUI2,LTU=xx,TYPE=DMCDATA,DMCALLWD=YES;
- STMI pool for IPDA:
CHANGE-SIPCO:TYPE=DMCDATA,DMCALLWD=YES;
- IP trunking:
CHANGE-TDCSU:PEN=<ltg-ltu-slot-cct),DEV=HG3550IP,DMCALLWD=Y;