We just installed a system running 7.0.23 patched in basic mode. It replaced a partner and the customer demanded that it mimic the partner no matter how much we begged. We have an issue where when they go off hook they get dial tone but when they start to dial there is no DTMF output and of course nothing happens. Unplugging the phone and plugging it back resolves the issue for a few days but then it comes back. It has happened randomly on several extensions that are on different DS8 cards. Has anybody seen this or have any ideas on what the problem could be?