Hi, I'm registering to SIP server with ADSL Billion VIBE Router using 7070. When registerd without VIBE tunnel enabled I have BAD voice quality, but my problem is when enabling the VIBE tunnel the call quality increases dramatically, but I can only phone for about 30 min then all calls ends up Opposite hangup, I then have to deregister the PABX and reregister and it will work again for about 30 min, please note its not the VIBE tunnel that fails