One call features a female voice reciting a long string of numbers, similar to a [[wikipedia:Numbers station|numbers station]] broadcast. The entire broadcast is just over 40 minutes long and can be listened to [https://www.youtube.com/watch?v=msar8tdc4zs here].
This broadcast is an encoding of the following message:<ref name="numbers">[https://steamcommunity.com/app/231200/discussions/0/620695877410574318/ <nowiki>[solved!]</nowiki> Strange mystery "numbers" on phone in Here and There Along the Echo (spoilers)]</ref>
<blockquote>''By night we suffer, wandering, night frees the imprisoned spirits, and his cage abandoned Cerberus himself strays. At dawn the law demands return to the pools of Lethe: we are borne across, and the ferryman counts the load he’s carried.''</blockquote>