Peplink Balance 380 multiple IP ranges


We have a situation where we want to seperate IP ranges between the following:

  1. Telephones GW
  2. PC’s GW
  3. Wifi devices that just need internet access GW

I have tried setting up VLAN’s but our switches are 5 years old and there are multiple brands. Is there a way for me to do this without VLAN’s as I will have to buy 6 new Gibagit POE switches which will be rather expensive?

P.s I have upgraded to FW 6.3.3 build 3560