quick Question!

what does cccam_ext mean and what's the difference between cccam and cccam_ext.

yea i see it on my oscam status page, i have a remote reader which a friend gave to me for my misses to watch tv globo (a brazilian station) and under the protocol section its says its cccam_ext (2.3.0-3367) and then on the reciever upstairs i have oscam running on it too with a reader which i made using a cline from my main box and under the protocol section on it it just says cccam (2.3.0-3367), i was just wondering what the _ext part meant!