Hi,

Just Found this Web after long searching for solution. Hope this time, I could get satisfying support.

My Equipments are : Router ZTE F609, Yeastar Mypbx SOHO Voip Server, DVR; get a static IP Public from ISP

The previous router is TPLINK TD-WD8951ND, Voip Server and DVR worked charmly. 7 months ago, my ISP replaced the cable to Fiber Optic, which in turn replaced the router as well. The new router is then ZTE F609. Unfortunately, I am unable to port forward ports to the VOIP. Various kinds of things were tried,

Such as changing port numbers and disbling the SIP ALG (as suggested by Yeastar). It is still in vain. This wreck situation is worsened by the fact that my ISP is Unable to give SOLUTION.  Even though  several field officers have been sent. I am thinking that they themselves are unable to solve the problem.

Please help give the solution on How to setup the ZTE F609 to port forward the My voip Server so it can be accessed remotely.

Thank you in advance...