3com NBX ip on the fly

I installed my first 3com phone at a remote users house today and I have a problem and i am clueless. ok I setup a tunnel and plugged the phone in and it downloads and works just fine except: I make the first call and the other end can hear me, well after i hang up and make another call the other party cant hear me - but all incoming calls can hear me. If I unplug the phone and plug it back in once again my first call works fine. If anyone can shed some light i would appreciate it.

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clardomita
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