Sip Phones not able to call or receive calls
the deep dive modules for ccie voice from INE, im currently doing module 5 lab
however im stuck with a problem and I cant seem to find how to fix it wondering
could give some pointers on what the problem could be.
I have a
problem with all sip phones they register then unregister after a while , I
cant call any of them or from them , while they are registered, calls between
SCCP phones work ok.
Also if I
switch all to SCCP everything works ok.
happens to all sip phones, when I call from an sccp phone it displays for
example To 1002 but no ringback nothing and after sometime fastbusy. IF I call
from sip to other phone nothing happens it just remains offhook.