THE RETURN LINE VIOLATION
=========================

The system reports:

    RETURN LINE VIOLATION
    SOURCE: BELOW

Relays activate along the service corridor. Node 608 is still active,
but the isolation percentage is falling. The voice is no longer trapped
beneath the carrier. It has found a route upstream.

The display adds:

    NODE SYNCHRONIZATION: 5 / 33
    WAKE THRESHOLD: 7

You have a maintenance key, a station identity, and the three-tone
sequence. You still need to learn which node is being used as the bridge.