We sometimes have VG224 or an 8-port FXS module in ISR 3845 router to connect analog extensions. What happens is that sometimes the ports regularly go out of service. What I have to do is to shut/noshut the port manually and then it comes back up fine. Next morning, the port is again out of service and we have to manually shut/noshut it to bring it back to service. Happens randomly on different ports.
Is it faulty port ? or faulty device ? or is there a known behavior with these devices ? Any comments would be appreciated !