We have a E1 line toward our ISP and this line is very unstable. Below is the syslog we get on our router:
%CONTROLLER-5-UPDOWN: Controller E1 0/2, changed state to down (AIS detected)
And below is the config on our E1 controller:
controller E1 0/2
channel-group 0 timeslots 1-24 speed 64
Please give us advices to solve the problem....