What does CSDN stand for?
CSDN stands for "Circuit Switched Digital Network"
How to abbreviate "Circuit Switched Digital Network"?
"Circuit Switched Digital Network" can be abbreviated as CSDN
What is the meaning of CSDN abbreviation?
The meaning of CSDN abbreviation is "Circuit Switched Digital Network"
What does CSDN mean?
CSDN as abbreviation means "Circuit Switched Digital Network"
