If you are talking about the my line extension appearing in the LCD at idle, then compare station class assignments for existing phone and the new phone in CMD's 1202 and 1207.
If you are talking about the outgoing caller ID, then check CMD's 1212 and 1213. Compare them to a working phone.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.