First make sure that something is being created in the log for when you loose a link. Take a note of the message and then go to your Orion server and open Syslog viewer. Then click on View and select Alerts/Filters Rules. Click on Add New Rule.
Fill out each TAB as necessary (otherwise just leave it as default). In the Message TAB you can be specific as to what Message Type Pattern or Syslog Message Pattern you're looking for. In my BGP syslog alerter, I have BGP-5-ADJCHANGE as the Message Type Pattern. And then in Alert Actions, click on Add New Action and select Send an E-Mail/Page. Then fill the email out with the info you're looking for. I just forward the syslog message so in the Message section, I have ${MESSAGE} as the variable.
Hope that helps.