router setup for polycom video conferencing

Dear sir,
i am new in microtik routing protocol.
we have a customer with public ip and microtik 750 router .he wants that he make video call through his router.
wan publick ip–1.1.1.1(example)
lan ip -192.168.1.2(device ip which allocated by router )

polycom said that Please check with your firewall/router whether the following ports are opened or not.
Port no Protocol Direction

1719 to 1720 TCP AND UDP BI DIRECTIONAL
3230 to 3290 TCP AND UDP BI DIRECTIONAL

2. The above things needs to be opened in our firewall and also required to forward the 1023,1024,1502,1503,1504,1730,1731,1732,65534 ports
3. We will use a private IP in our video conferencing system (192.168.1.2) so, please create a DNAT entry in our firewall to allow all incoming traffic.
4. If our firewall/router has any option to enable H.323 NAT traversal, please enable it.

so sir please give me the configuration for start and step by step.

please give me the solution