Hey! This is my first time here and I am learning about elastix for an office I am working at. So far I seem to have configured and set up most things correctly, I have 5 Sip extensions, 4 internal and 1 external at my home, using linksys SPA941 handsets. The 4 internal can call each other with no issues, clear sound both sides, They can also send and receive calls to the normal PSTN / outside world. I am happy with how it is set up. However my one external extension can receive and send calls (It registers with the server) but the external extension can only HEAR voice but not send it (one-way). I thought it was the elastix server and the NAT/router conflicting so I put the elastix server on the DMZ and still nobody was able to hear me from the external extension even though I could hear everyone I called. Here is my sip.conf: Code: [general] ; ; jbenable=yes ; jbforce=yes disallow=all allow=ulaw allow=alaw context=from-sip-external bindport = 5060 ; Port to bind to (SIP is 5060) bindaddr = 0.0.0.0 ;all addresses on machine) callerid = Unknown tos=0x68 qualify=yes and my sip_NAT.conf Code: nat=yes externip=xx.xx.xx.xx externrefresh=120 Can anybody help me please?