Wrong password - Registration Failed


[2018-07-09 10:53:35] NOTICE[2820] chan_sip.c: Registration from ‘“125” sip:’ failed for ‘’ - Wrong password

When making an new extension on the asterisk system the extension wont register, tried this on multiple phones.
However an existing extension will register to a new phone.
Using a Cisco IP phone .


Have you checked the log to make sure the correct sip.conf entry is being used for the device? Have you used the CLI commands to inspect configuration? Did you change things and forget to reload?