Some of our user are using Genesys desktop to receive calls from free numbers. They have cisco softphone but most of the time the Genesys application are unable to login and gives an error "Internal telephone error . The problem is resolved temporarily when we re-add the user's number in controlled device in CUCM under pgenesys and ask the user to restart the genesys application but we need a permanent solution for this. We checked with Genesys too but they said the problem is from voip end. Can anyone advice what could fix the issue.
Version - CUCM 7.1.3.