MTS site link via RAD Mux dropped, site dropped to LST


Error

MTS site link via RAD Mux dropped, site in LST Two sites in a daisy chain have lost site link and went to Local Site Trunking.

RAD Mux DXC-8R has shown a flickering E1 LED ( E1 is working fine) but only one of both controllers has a blinking LED, the other controller LED is off

Environment

Dimetra

MTS

RAD

Mux

DXC-8R

RAD Mux

Site Link 

Root Cause

Defective RAD Mux controller board

Workaround/Fix

Replace hardware