need urgent help with SPA8000

[zeevee2155]

i have 4units of SPA8000 which i want to use with my ISTP on all lines

but i acnnot disable NAT mapping on lines3-8 thus i can only use 2lines on each SPA8000

can someone please help on what to do

[nseto]

Please realize that L3-L8 (though having the same subnet lan as L1,L2) are natted.  It's by design.

Using voice requires OB proxy/stun.

[zeevee2155]

i tried OB proxy line 3-4 doesnt register ITSP line 6 does register but when off hook blank even the led on line six deosnt flick

isnt there a way to disable nat mapping as i was using this same Spa8000 for past two years and it had all lines Nat mapping disabled suddenly after reboot the lines 3-8 are giving this prob as cant change nat mapping

[nseto]

NAT mapping can't be disabled.  The L3-L8 are behind the L1-L2.