simple queues by interface

Hi.

I have a 433 board , i want to configure a very simple set of rules especially interfaces rules.

ether1 will be the LAN (connected to few computers) 192.168.1.0/24
ether2 will be the WAN (connected to SAT modem) External static IP
ether3 will be a SIP telephone line. 192.168.2.0/24

I simply wants to configure bandwidth priority to whatever traffic coming/going from/to ether3 and that ether1 is the second and last priority fo bandwidth consumption.

I dont know if and how its possible to configure queue by ethernet port.

Can anyone suggest which is the best way to go? and how to do it? or maybe a link on similar “how to”?

I have basic+ knowledge of Mikrotik and mainly i use winbox. but can manage with command.

Thanks in advanced,
Guy.