What mode must be enabled for the train to pass the call-on signal aspect?

To pass a call-on signal aspect, the Release mode must be enabled. This mode allows the train to proceed past a stop signal when the signal indicates that it is safe to do so, such as in cases where a train is taking a siding or avoiding a blockage ahead. The Release mode effectively grants temporary permission to proceed despite the signal generally indicating stop, ensuring safety measures are adhered to while also allowing for operational flexibility.

This understanding of the Release mode is critical as it pertains to adherence to signaling protocols that ensure train safety while operating within train control systems. The requirement to switch to the Release mode before passing a call-on signal is rooted in the principles of safe train operations, balancing the need for efficient movement through controlled environments with the overriding emphasis on safety.

In the context of the incorrect options, the MCS (Multi-Channel System) and MATC (Manual Automatic Train Control) are different operational modes that do not directly pertain to passing a call-on signal aspect. Similarly, the Bypass mode typically refers to operating under conditions where direct control systems are toggled off, which does not apply to the procedural passing of a call-on signal. Therefore, the focus on Release mode is essential to understand the parameters under which safe passage can be achieved