We are facing a peculiar problem in PRI .At one point of time, we are able to use only firts 7 channels of PRI i.e. in case of failure of channlised E1 , only 7 remote sites are able to dial to PRI.
In short, only seven channels of PRI can be used either for outgoing or incoming.
This was the working PRI. Suddenly , this problem has cropped up .
can somebody help on same?