I am using Elastix 1.5.2-2.3. Upgraded from previous version. In the past it use to work but when I started upgrading it did not. Apparently it was elastix and was hoping the latest, Elastix 1.5.2-2.3 will have solved the problem. My card is WCTDM/4 "Wildcard TDM400P REV E/F Board 5" (MASTER). It has green with Not In Use. The wires are plugged in to both ends. I do not hear a dial tone. From another sip phone that does work, I dial the extenions and it says "the person at that extension xxx is unavailable". Please help.