pfsense and BT cloud phones

  • PfSense 2.4 and BT Cloud base Phone(Polycom)
    Hi All,
    Just installed a New pfsense box(sg-3100) ,everything seems to work well ,apart from the Phones (x5nos.),which stop working after about 20 mins connected .(shows Unregistering )
    Created firewall rule to allow all BT Sip and RIP server from outside to inside lan on the WAN and a reverse of this on the LAN side. For all this rules Increase TCP timeout to 300sec
    Change NAT to option2 (Manual NAT etc) .
    Change the algorithm to Conservative.
    Am i missing something , a step by step (or detailed approach ) will be appreciated.

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