v20 Inbound SMS/Text Messages Not Received

[steve_fls]

Hello -

After we upgraded form v18 to v20 we've not been receiving inbound sms messages; we had no issues with receiving texts on v18. We can still send outbound sms messages, but nothing is coming back. I've gone over the following forum posts on the issue to review their instructions with no luck.

1. v20 Incoming SMS routing
2. Inbound SMS not working

I've also gone through the setup instructions with Flowroute and 3CX to make sure I've set everything back up correctly. I looked in Flowroute and can see the messages are being received and sent through the SIP provider, but nothing is coming through in 3CX. Can anyone provide further direction on how I can troubleshoot the issue?

Some system details:

1. SIP provider: Flowroute
2. 3CX version: Version 20.0 Update 4 (Build 487 Release); Self-hosted, on-premises
3. 3CX license: Professional

 

[Alejandro_3CX]

Hi there, check that the HTTPS Port 443 is opened in the firewall, I can notice yours its closed.

 

[steve_fls]

Thank you very much, I never double checked on our port forwards. Issue is resolved.

 

[Alejandro_3CX]

no problem, have a good day!

 

[Heath]

I am having issues too receiving SMS & MMS since v20 upgrade. And yes port 443 is opened on the firewall. Inbound are receiving through Flowroute but not coming through 3CX

 

[DYHLYU]

Hello there,

I'm having the same issue as Heath stated. Flowroute + 3CX Pro.
All my DIDs are receiving / sending SMS and I can see the log on Flowroute, but 3CX doesn't even show the logs. It's good up until Feburary 25th (today).

I'm using 3CX hosted server.

 

[Charles_3CX]

Hello there,

I'm having the same issue as Heath stated. Flowroute + 3CX Pro.
All my DIDs are receiving / sending SMS and I can see the log on Flowroute, but 3CX doesn't even show the logs. It's good up until Feburary 25th (today).

I'm using 3CX hosted server.

Have you reached out to Flowroute to verify if there are any issues on their end? Additionally, check the event log in the admin console dashboard for any errors related to SMS.

 

[Heath]

DYHLYU.. What I found out my issue was is the webhook changed when I upgraded from V18 to V20.. I had to update the webhook from 3CX into Flowroute.. For kick & giggles I also took a new API from Flowroute and placed it in to 3CX. Once I did that, I then was able to get Text Messages... So my opinion check the webhook address in 3CX and compare that in flowroute

 

[DYHLYU]

Hello Charles,

Yes it was and issue with Flowroute, they posted this as an issue and are fixing it right now.

Thanks all

 

[BrianC]

Flowroute messaging did not work at all yesterday and is still not working this morning on my system. Messages are definitely being received by Flowroute as they are in the logs but not 3cx. I am able to send SMS only, not MMS.

The Flowroute status page says it's a 3cx issue. Please advise.

 

[YiannisH_3CX]

Flowroute did contact us regarding this and gave us a few examples. The issue is happening to multiple 3CX versions which have been released for months and no changes were made to those.
SMS is handled locally on the PBX and since we have multiple versions of the PBX affected which have been working for months and no changes were made to those, then the issue is not from 3CX. We suspect something changed on Flowroutes end but we are still investigating.

 

[healthy]

To hopefully assist in troubleshooting, we have the same issue. Hosted with 3CX. 2 separate instances.
Have re-created the integration, webhook, etc. to no avail. SMS messages show up in logs at Flowroute, but not in 3CX Inbound and outbound affected.

 

[YiannisH_3CX]

To hopefully assist in troubleshooting, we have the same issue. Hosted with 3CX. 2 separate instances.
Have re-created the integration, webhook, etc. to no avail. SMS messages show up in logs at Flowroute, but not in 3CX Inbound and outbound affected.

What PBX version are you running and when did the issue start?

 

[healthy]

What PBX version are you running and when did the issue start?

Issue appears to have started yesterday all day, Was working on 2/24/25 until 3PM, but we didn't have anything in or out until yesterday around 4pm.
Version 20.0 Update 4 (Build 487 Release) for both instances.

 

[healthy]

We have been notified by Flowroute that the issue was corrected. Any update as to what the issue was?