I'm certain I'll need to quote some of my server's logs to help find an answer to my problem but I didn't want to over post too much information right out the door. Here is my problem: Internal EXT > External EXT [OK] External EXT > Internal EXT [OK] Internal EXT > VOIP Provider [OK] VOIP Provider > Internal EXT [OK] VOIP Provider > External EXT [OK] Internal EXT > PSTN Gateway [OK] PSTN Gateway > Internal EXT [OK] PSTN Gateway > External EXT [OK] External EXT > PSTN Gateway [NO AUDIO] External EXT > VOIP Provider [NO AUDIO] I was able to sort out all my problems except for these last two by binding everything to the media server. Internal extensions, external extensions, pstn gateway, voip provider, everything. I've tried enabling and disabling bind to media server and external extension on the various extensions / gateways in every possible combination but I'm stumped My external gateway is a SPA3102. I have an External range of 9000-9100 opened on my firewall and in 3CX for external devices (I don't have that many external devices I just wanted to use a large, round number for testing purposes) Has anyone else had this problem and knows how to fix it? I've searched the forums but haven't found an answer. Also to the experts, is there anymore information I can give you to help figure out this problem? Thanks in advance.