After upgrade to 1Gb Fiber internt using Arcadyan NH20A landline down
 

After upgrade to 1Gb Fiber internt using Arcadyan NH20A landline always has issues, some call are working,but most are no sound after dailing out (make phone call) . I have phoned the tech a lots of time ,everything tried but problem still has. any ideas? I think maybe it was Port forwording issue, but I cannot find the landline IP address in router ( 192.168.1.254)
need help,, Thanks


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