What does NDUB stand for?
NDUB stands for "Network-Defined User Busy"
How to abbreviate "Network-Defined User Busy"?
"Network-Defined User Busy" can be abbreviated as NDUB
What is the meaning of NDUB abbreviation?
The meaning of NDUB abbreviation is "Network-Defined User Busy"
What does NDUB mean?
NDUB as abbreviation means "Network-Defined User Busy"
