Hi All, I have got 3CX fully installed on WIn2008 and have registered my HT-503. I can receive calls in on my phone line (O2) but cannot make calls out. When I make calls out after a long pause, the line brings back an error 'The number you have dialed is not recognised' I have spoken to Grandstream this afternoon, who have accessed the ATA to make sure all is ok with the config etc, which they say is correct. The ATA is up to date: Product Model: HT-503 V1.1B Program -- 184.108.40.206 Bootloader -- 220.127.116.11 Core -- 18.104.22.168 Base -- 22.214.171.124 CPE -- 126.96.36.199 After speaking to a colleague who installs 3CX systems for the company I work for, he has recommended I post up a section of the dial log, so you can see what's happening. I hope someone here is able to look at the log and tell me which button I haven't pressed properly, as I am a little lost! Massive thanks in advance. Ash.