What does CCIS stand for?

CCIS stands for "common-channel interoffice signaling"

How to abbreviate "common-channel interoffice signaling"?

"common-channel interoffice signaling" can be abbreviated as CCIS

What is the meaning of CCIS abbreviation?

The meaning of CCIS abbreviation is "common-channel interoffice signaling"

What does CCIS mean?

CCIS as abbreviation means "common-channel interoffice signaling"