Hi,
After new firmware (STD SIP 02.03.109.04) flashed into the ITL-6DE-1TEL, and configuring SIP Line 1, Register Server IP, and SIP Port, I don't see any SIP REGISTER event coming from DT700. Is it normal? It is something as described by @jlb2020 and @Tecnimar, SIP phone doesn't do anything...