Multiple VOIP Phones for House (not DECT)

So currently have a Grandstream HT812 connected, and working with AAISP with two incoming lines, which are connected to Siemens SL56 DECT handsets, of which we have 4 !

These are getting very old, and it's about time to retire them as batteries are getting difficult to replace.

So I would ideally like to get 4xVOIP handsets, I already have a working Yealink AX83H and it works with AAISP, the only issue is

there seems to be an issue or not supported that incoming calls only ring the last registered device.
(as stated on the AAISP configuration panel), although contradictory info is given in the support docs, that all devices are rang!


It really seems a step backard to connect a Fritz Box (DECT)/Siemens N300 IP/Yealink DECT base station and then connect handsets via DECT

Anyone doing anything similar with multiple VOIP Phones. (non DECT)

You could use the Fritzbox with wired (or wireless) VoIP phones as well if you don't want to use DECT phones.
or run Asterisk or FreePBX on a Raspberry Pi.

my issue is when using VOIP with AAISP, not all the phones ring at the same time.

because it only rings the last registered device, so even if I had 4 x VOIP phones registered, it would only ever ring the last registered VOIP phone.

Dial-out is fine, the issue is running around the house trying to answer the only phone ringing

I want a simple system, not hosting my own PBX, I could do that with Unifi or 3CX

Edited by einsteinagogo (Mon 04-May-26 22:15:02)

Can't AAISP advise how to fix this? AIUI it should be perfectly possible to set them to all ring.

In reply to a post by einsteinagogo:

my issue is when using VOIP with AAISP, not all the phones ring at the same time.

The default was the AAISP system called all logged in devices. You might want to check to see if one of your devices is doing something like anti-spam calls where it answers but keeps ringing locally.

In reply to a post by ChrisAO:

Can't AAISP advise how to fix this? AIUI it should be perfectly possible to set them to all ring.

I can confirm that all phones on our AAISP VoIP ring at the same time. We have an AAISP supplied Zyxel router with phone ports on the back. Plugged into that we have one old-style wired phone and a set of four BT cordless phones. Then we have two mobiles with Acrobits linked to the AAISP VoIP and all phones ring simultaneously.

Simple

Gigaset n530 (newest version) (which replaces the n510 and n300s)

up to 8 dect handsets - 8 sip providers - 8 simutanious calls

and ebay the grandstream and possibly the yealink.


By saying no to dect you have made things complicated in an uneeded way

having a voip dect base station makes more sense than "voip phone" if you want to go that way use a mobile with a sip clinet.

In reply to a post by GonePostal:

In reply to a post by ChrisAO:

Can't AAISP advise how to fix this? AIUI it should be perfectly possible to set them to all ring.

I can confirm that all phones on our AAISP VoIP ring at the same time. ....Then we have two mobiles with Acrobits linked to the AAISP VoIP and all phones ring simultaneously.

same here n510 and acrobits

Hi,

AAISP do ring all registered devices.

Can you confirm whether any of the devices are behind NAT? If they are then what configuration have you created such that AAISP can actually contact all VoIP devices rather than just the last one that created a mapping in your router?

In reply to a post by ChrisAO:

Can't AAISP advise how to fix this? AIUI it should be perfectly possible to set them to all ring.

This is the contradicition from AAISP

1. Only the lasr registered device will ring - observed.
2. Multiple registered devices ringing is not supported by may work.
3. Wiki - Multiple registered devices will ring.

Confirmed by other Techie Nerds on other forums - multiple registered devices do not work, only the last registered device rings.