What I am driving at is the no. of unique group calls available at site A with only 1 GSM carrier. Is below true?
Scenerio 1: 7 people are calling people OUTSIDE of the site A, then there will be 7 unique group calls (between 2 people).
Scenerio 2: 7 people are calling people all INSIDE of the site A, then there will only be 3 unique group calls, plus the last person either to be put on hold or call OUTSIDE site A.