We use a VG 224 for analog phones and modems. It was running code vg224-i6s-mz.124-22.T.bin . We were having issues with the modem sometimes working and other times not completeing calls properly. Outside vendors that dial in to receive information on the device they support claim they have issues as well. I have put a phone on the line and there is no noise , I can make a call, but still the modem has issues. Modem passthrough is enabled. Today I upgraded to vg224-i6s-mz.124-25b.bin and rebooted the vg224. All but 3 devices have a busy. The three other devices seem to work fine. The configuration is still there. I cannot clear the busy when I put a phone on the line and press the on-hook button. I have reset the device in Call Manger ( Version 7.12.31900-1) but that has not changed anything. Are the VG 224 ok for modems? Any idea on how to clear the busy?