Missing Phone Calls on RBR50 Mesh Network

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Jak29672 wrote:

... connected to a Hitron CODA-48 modem.

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According to Professor Google, that is a cable modem/router. So you are piling router in router.

Two routers on your network can cause headaches. For example, you can end up with local address problems. Among other things, the other router can misdirect addresses that the Netgear router usually handles, such as routerlogin.net or the usual IP address for a router, 192.168.1.1.

This explains some of the other drawbacks.

What is Double NAT? | Answer | NETGEAR Support

Unless you have specific reasons for using two routers – to create two separate networks for example – it is often easier to use just one router and then to set up the second router as a wifi access point. Netgear advises this, as does just about every site you will visit.

Disabled Features on the Router when set to AP Mode | Answer | NETGEAR Support

It may be possible to put the modem/router into modem only (bridge) mode and then to use the second device as the router.

A lot of people use an Orbi system in AP mode, especially if they have a decent router in front of it. Only you know which of your two routers provides the best features for your needs.

I have no idea how this would affect wifi calling.

While many questions about routers are generic and could be answered anywhere, some things need specialist knowledge.

You might get more help, and find earlier questions and answers specific to your device, in the appropriate section for your hardware. That's probably here:

Orbi - NETGEAR Communities

You might like to search there for messages related to your problem.

I will ask the Netgear moderator to move your message.

In the meantime you could visit the support pages:

Support | NETGEAR

Feed in your model number and check the documentation for your hardware. Look at the label on the device for the model number.

Check for various troubleshooting tips.

You may have done this already. I can't tell from your message.

I mention it because Netgear stopped supplying printed manuals and CD versions some years ago and people sometimes miss the downloads.