Curious Transceiver

The Curious Transceiver is a quest item obtained from completing the story mission The First Firewall on Earth. It is part of the Sleeper Simulant quest and the player must input four codes in the transceiver to unlock the next part of the mission. The codes are inputted one at a time, in the order the knights spawn in the final room during the mission from which the item drops. The top row stands for 1, the bottom for 2 are as follows:

Code 1: 1 2 1 1 2 2 2 1 2

Code 2: 1 2 1 1 2 2 1 1

Code 3: 1 2 2 2 1 2 2 2 1 1

Code 4: 1 2 1 2 1 2 1 1

From here the player will receive a new quest step on earth called Shadow Call, where the player must complete a variant of the mission Cayde's Stash in under 4 minutes to successfully move on in the quest.