(Posted this in the wrong section at first) 3cx tied to 8 analog lines on a grandstream 4108. All linksys/cisco phones. You guys have helped me solve everything so far so im back for more. Most of the time its fine, but i can recreate the issue if i keep trying. Its about 1 out of 10 calls either coming in from outside or going from inside to outside. Internal seems to be just fine. I messed with the codecs and tried all the different ones available in the grandstream and got the same results every time.