Decided to go VOIP for my landline with 2Talk about 2 weeks ago after getting a ATA device, all seems to work fine except my family in Melbourne can't call me from there Optus landline (says "incorrect or invalid #"), but a Optus cell phone calls my voip line fine and so does a landline or cell in NZ.
Is a local number in CHC 03-928-****, they have tried +643928**** and 00643928****.
Is it my end or Optus end, any help would be appreciated, searched Whirlpool forums and could not find anything.