Yealink desk phones not ringing but 3cx app is

[voiptechkin]

Sporadically, a call will come in and the desk phones will not ring but the 3cx app. All calls are routed to a ring group with 4 phones using Voxtelesys. The site has only 5 phones. I have checked the activity and events and neither show any errors. Any help would be appreciated. Thanks

 

[KyriacosS_3CX]

Hello,

How are the phones connected to the PBX?