Two different modems with one router?

I have an associate who handed me  a UTT  AC750GW router
and he said that he was told by another tech that the router can be hooked to two separate internet provider connections, one DSL and one cable, which would allow him to create a system that would provide "fail-over" if one internet provider went down.
The router as you can see obviously accepts both DSL and Cable but I'm really at a loss as to how this could be configured due to my basic understanding that a single router can only be dedicated to one modem at a time and I haven't found anything on the internet that would lead me to believe otherwise regardless of whether it will accept two different types of connectivity.
Am I missing something here and have I fallen so far behind in SOHO networking that I'm beyond hope ?
I know that if I can't the right answer here then I probably can't get it anywhere.
Any help will be greatly appreciated.
Wayne Hudson
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Fred MarshallPrincipalCommented:
You see on the data sheet where it says "load balance or failover"?  That means there are ports for ISP connections and there are controls to select either load balance OR failover.  You just tell it which mode you want.
Failover will generally switch between the ISP connections.
Load Balance will share the load between them.
In Load Balance you likely will be able to bind protocols or other parameters to each ISP port.

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JohnBusiness Consultant (Owner)Commented:
You can do failover in a router that supports it. My Cisco RV325 supports two internet connections and failover

For the number of times my internet fails, I use my HUAWEI USB stick to fill in  when needed. I use the HUAWEI stick for travelling anyway
marvinwaynePrincipalAuthor Commented:
Thank you both very much. I was able to find an instruction manual online and while you guys make sense I'm not real clear on the manual's directions. Please forgive my network ignorance but I'm just not clear on the initial hook up and what goes where. Even though I've hooked up a lot of wireless routers, nothing has been like this. I promise that I won't ask you guys to go through instructions on this but I need to get a better understanding of this particular router. The Cisco link you sent me John was very understandable but this explanation is throwing me. configuration drawing  A diagram from the manual that is confusing to me primarily because I don't understand how the two different broadbands are "meeting" to then connect both to the WAN port if in fact that is what it is trying to display.  I'm pretty sure that I will be able to handle the router configuration, it's getting the connections down that I can't wrap my little brain around so if you can shed some more light on this particular issue I would appreciate it.
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JohnBusiness Consultant (Owner)Commented:
Go into the GUI, look under the Network (WAN) setup and the failover setup should be in there..
marvinwaynePrincipalAuthor Commented:
Thanks John but the failover is not what I'm concerned with if that's what you're referring to. I'm confident on being able to configure the router once it is set up however I'm literally drawing a blank on the initial connection of the two broadband connections. In your email you had two Cisco routers, both supporting a WAN connection which is perfectly understandable to me however with this UTT unit it has only one router and one WAN connection and I just can't understand how to add both broadband connections to , DSL and Cable, to one WAN connection like they show in the diagram. Would the DSL modem connect to one of the LAN ports? Would it connect to some type of splitter? I'm sorry but like I said I'm really drawing a blank on this setup. I'm missing something here and it's probably very basic but regardless it's just not registering. Thanks again for your help again. I really do appreciate your feedback and it is helping even though it may not appear that way.
JohnBusiness Consultant (Owner)Commented:
If not concerned with failover you can (in my router) just switch WAN's when needed.

I have ONE router, dual WAN connections, like yours and you can have two connections into it
Fred MarshallPrincipalCommented:
In the Quick Start Guide, those ISP connections A, B and C are examples of each type when using ONE.

The manual Table 1-2 says:
Note: Some products support configurable LAN/WAN, so the corresponding ports can be
configured as LAN port or WAN port (such as WAN4/LAN2, WAN3/LAN3, and
Many devices assign ports using software and configurations.  So, as above, a port can be a LAN port OR a WAN port depending on what you configure it to be.
marvinwaynePrincipalAuthor Commented:
Thank you both again. That is beginning to make a little sense now.  If this is software related I can probably deal with it. My initial recommendation to the person John was to do exactly what you said and just manually change providers based on failure however he wanted automatic.
Regarding your explanation Fred, am I correct in assuming that I can connect the DSL to the WAN2 port on the router, then connect the cable to the WAN1 port on the router and then configure the router to recognize both as a WAN and then configure the failover from there? Or am I still way off base.
I think I'm getting there but  I'm not quite sure and I believe the answer to the above question will help solve this issue for me.
Again, thank you both for your continued very helpful input.
The VERY FIRST THING YOU DO in setting up this router is set the number of WAN Ports, in Network/Number of WAN.  If you choose just 1 WAN port, it will be the port on the right, farthest from the power socket.  If you choose 2 WAN ports, it will be that port and the one next to it (to its left).   Any ports that are not set as WAN ports will be LAN ports.  You then restart the router for that setting to take effect, and configure the rest of your settings after having done that.   The port to the far right will be WAN1, and the port next to it will be WAN 2.  You connect one modem to each of them, so one of them is connected to your DSL modem adn the other is connected to your cable modem.  You then configure WAN1 and WAN2 appropriately for those two connections in the Network / WAN page.  Then, configure load balancing in Network / Load Balancing.
am I correct in assuming that I can connect the DSL to the WAN2 port on the router, then connect the cable to the WAN1 port on the router and then configure the router to recognize both as a WAN and then configure the failover from there?
That is correct. After you setup and configure the 2 WAN ports, assuming your router supports them, you need to get load balancing going. And based on the manual, it appears you would be using the Load Balancing section for this. Look specifically at the Partial Load Balancing Section (

Link to Manual
marvinwaynePrincipalAuthor Commented:
OK. I think I've finally got a grip on it. It's not going to be a quick job for me but I'm pretty sure that I can get through it with enough pre-study of the manual. If not for everyone's input I'd still be in complete limbo on this setup and still wondering how I was going to connect two WANS to one WAN port.
After I understood that you configured the router to accept them it makes perfect sense. The last comment from Fred and the comments from akahan and masnrock helped pull everything together.
I'm sure you hear this a lot but I can't thank each of you enough for your input and assistance. I wish I could give each of you "Best".
As always Experts Exchange comes through for me.
JohnBusiness Consultant (Owner)Commented:
You can mark the posts you want
marvinwaynePrincipalAuthor Commented:
Like I said, I wish I could give them all a Best. Fred's overall comments throughout helped open my eyes and understand and the comments from akahan and masnrock were fantastic in taking my understanding a step further.
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