While restarting the sip dialer, it failed to start.
- Check if there is an error in the sip dialer's log.
- If there is a below error then this could be because of AES down.
- Ping AES IP and check if it's reachable. If it's not reported to the IT team.
DEBUG VoiceLibrary.TServerManager - SecurityLogout return:-3:
DEBUG VoiceLibrary.TServerManager - SecurityLogin return:-9:
Report to IT Team at customer environment to get the AES up and running.