Phones Continue to ring after hung up on other phones.

[grossco13]

A client hangs up a call on one phone and it continues to ring on either their 3cx app or deskphone after hanging up.
V20 Self Hosted in cloud#
Enterpise 16 sim
Yealink T54w and 3cx desktop and mobile app

 

[Alphabetic]

Passing firewall test?

 

[grossco13]

yes

 

[TheodorosG_3CX]

What is the firmware version and provisioning method?
Any modification to the 3CX Parameters?

 

[grossco13]

Yealink t54w
fw 96.86.0.77
connected via sbc
in options and troubleshooting "support re-invites" and "support 'replaces' header' are turned on

 

[grossco13]

by the way the system is actually v18

 

[TheodorosG_3CX]

You are using an on-prem SBC?

 

[grossco13]

yes we are using a phone sbc

 

[Alphabetic]

When they're on the call, are the endpoints still ringing or does the ringing happen when the call is ended

 

[grossco13]

i think its only if he hangs up without answering it keeps ringing on other phones

 

[TheodorosG_3CX]

The call is routed to the extension directly?
What is the configuration of the Forwarding rules?