An asari on Kadara hasn't spoken to her mother since she was exiled from the Nexus. There's a possibility the signal from her communications equipment could reach the Nexus, but it's broken. You need to look into repairing the equipment for her.
Speak to the asari refugee located at the refugee site in the Haarfel region of Kadara. This task unlocks after interrogating Vehn Terev during "Hunting that Archon"
Scan the communications terminal on the desk in front of the grated window inside the hut. Go up to the roof and scan the communications array. After scanning the array, find the interaction prompt and fix the array. Return to the inside of the hut and hear the refugee's mother through the radio to verify it's working. This completes the task.