-
What does CALL+PROGRESS+TONE Stand For?
For CALL PROGRESS TONE we have found 2 definitions.
-
What does CALL+PROGRESS+TONE mean? We know 2 definitions for CALL+PROGRESS+TONE abbreviation. Possible CALL+PROGRESS+TONE meaning as an acronym, abbreviation, shorthand or slang term vary from category to category. Please look for them carefully.