Hello to everyone this is my first post on this forum can you please help me for setting up GATM4 from my BCM50e as a expansion.. they said there is only a trick on the DIP switches but i tried and none of them is working for me, i tried the default one which is all DIPswitch is on, all is off, i put to also 011111(off, on, on, on, on, on) but still desame i tried to reboot the main unit and the expansion unit many time, itrid also to put it on expansion #2 but still no luck! i checked from the BCM manager in Resources-Telephony Resources expansion #1, BUS #5 it was still in enabling mode. i am sure i have a keycode for 1 expansion.. before it is working fine with my DSM16+ but now the customer want to change it from DSM16 to GATM4 but icant make it to work can anyone will help me please.. thank's in advanced..