Duplicate calls occurring at the same time

[steve_fls]

We are experiencing issues with our phone system since the last update where when making an outbound call, there are two call be initiated within a second of each other and the user can hear both. We use Flowroute as our SIP provider and I've included sample logs below:

3CX logs:
10/21/2025 1:27:28 PM Outbound Answered - 00:00:26 00:01:01 1.03 Dialed: (xxxxxxxx7316) → Via rule: Outbound rule for Flowroute (xxxxxxxx7316) → Via trunk: Flowroute (xxxxxxxx7316) → Ended by User (108)
10/21/2025 1:27:28 PM Outbound Answered - 00:00:02 00:01:25 1.42 Dialed: (xxxxxxxx7316) → Via rule: Outbound rule for Flowroute (13043637316) → Via trunk: Flowroute (xxxxxxxx7316) → Ended by User (108)
Flowroute logs:
Oct 21, 2025 1:27 PM Oct 21, 2025 1:28 PM 90 OK 200 +xxxxxxxx4800 UNITED STATES $0.01249500 34.225.210.28:5060 xxxxxxxx7316 UNITED STATES UNITED STATES Outbound 86 6 0.008330 completed
Oct 21, 2025 1:27 PM Oct 21, 2025 1:28 PM 66 OK 200 +xxxxxxxx4800 UNITED STATES $0.00916300 34.225.210.28:5060 xxxxxxxx7316 UNITED STATES UNITED STATES Outbound 63 6 0.008330 completed

It does not occur with every call either, it seems to be sporadic.

 

[leejor]

Have you looked at the 3CX Activity Log (Verbose), to see the actual call routing after the Invite from the extension?

 

[KyriacosS_3CX]

How was the trunk set up?