I am sure the extensions are logged in the queue. There is another way to login the queue on the desk phone? one of my desk phone is yealink, I also used eyebeam to registered an extension, it doesn't work in the queueWhat phone, as the yealink default ring for queue is just one little sound
Also check all the extensions are logged in the queue
Founded in 2005, when VoIP was an emerging technology, 3CX has gone on to establish itself as a global leader in business communications.