Using BT Cloud Phone and third party router Draytek

I have an office which has BT service. This has the BT Cloud Phone service. It has the BTB Hub 6.

Does anyone know much about using that BT Cloud Phone service with a third party router ? In this case a Draytek Vigor.

The other day I put in the Draytek, and got broadband ok. But the phone service failed.
It is a Voip service. I have a BT page shows various port numbers. What I don't know is this a 'standard Voip' type of service?

There is a separate box which I assume is some sort of ATA. Again, does anyone know if just plugging this into the Draytek will do everything that's needed ?

I don't have the luxury of testing all sorts of setups, as the broadband and the phones are "important to the operation of the business"

I had put up a similar post on the BT and the Draytek forums - hope this doesn't cause any aggro for cross-posting. No replies on any of those, yet.

You need to have that adapter plugged in to the network at some point - that is the phone adapter and DECT base. The Yealink W56H is just a handset that connects to it,

I am using it plugged into a Ubiquiti switch which is plugged into a Ubiquiti gateway and router - that the has a single connection to the BT

Thanks MHC.
That's very helpful.
Do you know whether it would pickup IP numbers from the DHCP of the Draytek ?
I'm assuming it won't be fixed to some 192.168.0.x or 192.168.1.x address. I like to pick my own subnets.

Do you know whether it could be on a separate VLAN from the office network ?

Cheers.

Yes, depending on whether you have fixed or dynamic. I tend to have a block of DHCP addresses that are allocated, and then specific small fixed blocks for certain items: ...210-219 VoIP, 220-229 SMART Building, 160-179 WAPs, &c &c and it works fine. I also don't use 192.168..

It is now on FTTP and has spent the past 10 weeks on a 70Mbps FTTC.

I would love to be able to integrate it with my other VoIP but BT will not release details.

Excellent MHC that is extremely helpful, thanks.

Sounds like you organise things much the same way I do

I can head back in there one day next week and be confident.

Thanks again.

A quick follow up.
I went in yesterday and swapped in the Draytek router again, taking the BT Hub6 out.

Configured port redirection for a couple of ports.
Power cycled the ATA (or whatever it's officially called).

All working fine, tests all good.

Thanks @MHC for your help.