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Author Topic: Digital Phone Router, Fixed IP  (Read 119368 times)

tickmike

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Digital Phone Router, Fixed IP
« on: September 15, 2025, 09:28:06 PM »
Just thinking out of the box.

As I understand BT Digital Voice phone and other isp's phone systems will only work with there supplied Router to plug in the phone/s and must be the first .

But I do not use isp supplied routers ! I use a pfSense box.

So if I used one of my fixed IP's   (from my block of /29)  that will come from my pfSense box first,
 only for the isp's router for the phone and no other use for there router.

Would that work ?.

OR

would I have to have the supplied isp's router first, set it to Bridge Mode then to my pfSense box ?

Idea's please.
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I have FTTP (G.984) from 'No One' isp, Fixed IP > pfSense (Hardware Firewall and routing).> Two WAN's, Ethernet LAN, DMZ LAN, Zyxel GS1100-24 Switch, 4 access points, outside WiFi Antenna.

licquorice

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Re: Digital Phone Router, Fixed IP
« Reply #1 on: September 15, 2025, 09:59:57 PM »
I've no idea about any other ISP, but BT's Digital voice can only be used with the BT Smart Hub2 as the first connected device. It doesn't have a bridge mode and even if it did it wouldn't help as in bridge mode it wouldn't have access to the IP layer anyway.
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tubaman

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Re: Digital Phone Router, Fixed IP
« Reply #2 on: September 16, 2025, 07:57:00 AM »
As already said, BT's Digital Voice must use their router as the first device but I don't think that's the case with all ISPs. My village will soon get FTTP via Wessex Internet and their phone offering appears to use an ATA that they supply to plug into their router. As they also let you use your own router I'm assuming that their ATA will also work with that.
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BT FTTC 55/10 Huawei Cab - Zyxel VMG1312-B10A > BT 'Smart' Hub 2

licquorice

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Re: Digital Phone Router, Fixed IP
« Reply #3 on: September 16, 2025, 08:12:22 AM »
There is an extremely complicated workaround posted here https://forum.openwrt.org/t/bt-digital-voice-and-3rd-party-routers/142125 but don't know if it is still valid.
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tickmike

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Re: Digital Phone Router, Fixed IP
« Reply #4 on: September 16, 2025, 09:10:27 PM »
Right thanks, back to the drawing board.   :hmm:

It looks like one of my isp's there VOIP system needs to use there router first and they do not use ATA boxs.

Thanks for the link, it looks very complicated.
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I have FTTP (G.984) from 'No One' isp, Fixed IP > pfSense (Hardware Firewall and routing).> Two WAN's, Ethernet LAN, DMZ LAN, Zyxel GS1100-24 Switch, 4 access points, outside WiFi Antenna.

tubaman

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Re: Digital Phone Router, Fixed IP
« Reply #5 on: September 17, 2025, 08:37:10 AM »
Quote from: tickmike on September 16, 2025, 09:10:27 PM
...
It looks like one of my isp's there VOIP system needs to use there router first and they do not use ATA boxes.
...

It depends if their VOIP service uses standard SIP connection protocols (BT's is proprietary, hence have to use their router). If they do and they'll supply the connection details then you can use your own ATA or router with built-in telephony.
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BT FTTC 55/10 Huawei Cab - Zyxel VMG1312-B10A > BT 'Smart' Hub 2

meritez

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Re: Digital Phone Router, Fixed IP
« Reply #6 on: September 17, 2025, 09:42:27 AM »
Quote from: tickmike on September 16, 2025, 09:10:27 PM
Right thanks, back to the drawing board.   :hmm:

It looks like one of my isp's there VOIP system needs to use there router first and they do not use ATA boxs.

Thanks for the link, it looks very complicated.

It's not complicated, but it would involve three devices running instead of just one BT Hub.
so from your PFSense box, you would require Jails to be installed, and the Virtual Server in the Jail would need to be run as the Linux Server passing the relevant information to the BT Hub.

So PFsense with host-uniq changed
https://forum.netgate.com/topic/153911/setting-host-uniq-for-pppoe/12

What linux version do you want to run in the Jail on PFsense?
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