Polycom IP 550 IP Phone "keep flashing line" Questions

...flashing, but no message- Polycom 550 This is usually a problem with the phone's configuration. Is this phone getting it's configuration from a network server or pbx? If so, find the configuration ...

...flashing and if you listen to the message then there is nothing. Can someone help as the South-African agengent is not giving any joy. Is the phone in a ACD? I'm guessing it also has a broken dial ...

...flashing firmware on avaya 56xx telephone.  I have an issue on 5610SW, it keep looking for finding router, and finally came up with "Bad router?"  What can I do to get rid of this ...