Question3Replies46Views Karthik K Member since 2016 32 posts PEGA Posted: 3 years agoLast activity: 3 years ago Closed CTI PopUp Port 5028 is already in usePort 5028 is already in use. Unable to start the Screen Pop Control with this port assignment.Could not find any thing in logs. Please, explain what would trigger this pop up ?***Updated by moderator: Lochan to add Categories*** Pega Customer Service User Interface ×Close popoverFacebookTwitterLinkedinEmail Copy Link Copied! Moderation Team has archived post This thread is closed to future replies. Content and links will no longer be updated. If you have the same/similar Question, please write a new Question. Posted: 3 years agoSwarnenduM Infosys replied to Karthik KScreen pop is triggered if there is any incoming call or the call is being simulated. Pls follow this link to understand more on this. https://pdn.pega.com/pegatube/support-guide-how-capture-cti-debug-and-s… Posted: 3 years agoKarthik K PEGA replied to SwarnenduMThanks for the reply. Yes Swarnendu. But, can we find out -- why that port is already in use and who is using it. any clues ? or whether that port is locked by some thing ? It is not happening consistently and its random. Posted: 3 years agoMahesh Midthuru PEGA replied to Karthik K@karthik - if you are using Windows OS then open the run command and execute resmon.exe from Run then go to Network tab and Select Listening Ports as shown in the attachment which contains the Port and Process ID information.