I am working on an issue we are having. We have an SNI board connected to a DS1-C that is connected over our fiber network to another DS1-C and then to an Exp-Intf card.. This EI card keeps alarming. Sometimes twice a day and it is affectiong service. It seems to clear upon busy/reset/releasing the near end DS1-C board. All physical connections seem good. I am going to try swapping the EI board after hours today... Just wanted to know if anyone had any ideas about other possible issues... Thanks for any help in advance.