Connecting two 406 unit via internet

[milkshake456]

I have been using a product from Multitech the mvp 800 and have 13 locations connecting via the internet allowing dialing between my locations. To allow this I direct the multitech unit to the external IP of the router at each end and then port foward the traffic into the Multi tech it been working great for years. Oh well now with the new, I now am replacing all the phone systems with the Ip Office and would like to do the same, I know and have setup VPN tunnels an allow this and it works allowing extension to extension dialing, but I would like to would like to use my old configuration like the multitech. I cannot find the a port listing to forward for the traffic. Has anyone tried this or have a port listing I can use. The routers I currently have are fvs338 and fvs538 units. Thank You

 

[DavidCT]

Why are you opening ports if you have a VPN between sites? Are you saying you don't want to use a VPN?

 

[milkshake456]

Yes I do not want to use a vpn. Thank You

 

[DavidCT]

Here are the ports used on the IP Office:

http://marketingtools.avaya.com/kno...ml/ports.htm?zoom_highlightsub=port+ip+office

 

[kwing112000]

o dont know if it will work with NAT. maybe if you use SIP but i dont know.