Which sequence correctly represents arming two-way telemetry?

Which sequence correctly represents arming two-way telemetry?

• A. Enter the EOT ID into the head-of-train device, then press the TEST button on the EOT.
• B. Press the TEST button on the EOT, then enter the EOT ID.
• C. Enter the EOT ID into the head-of-train device only.
• D. Power cycle all devices.

Answer: (A)

Arming two-way telemetry works by first telling the head-of-train device which EOT you’re talking to, then actually enabling the link from the EOT side. Entering the EOT ID into the head-of-train device identifies the specific End Of Train unit for communication. Only after this identification is the EOT ready to be armed, which is done by pressing the TEST button on the EOT itself. If you press TEST first, the EOT doesn’t know which device to pair with, so the arming process may fail or not engage at all. Simply entering the ID without testing won’t activate the telemetry link, and power cycling resets devices but doesn’t complete the arming sequence.

Arming two-way telemetry works by first telling the head-of-train device which EOT you’re talking to, then actually enabling the link from the EOT side. Entering the EOT ID into the head-of-train device identifies the specific End Of Train unit for communication. Only after this identification is the EOT ready to be armed, which is done by pressing the TEST button on the EOT itself. If you press TEST first, the EOT doesn’t know which device to pair with, so the arming process may fail or not engage at all. Simply entering the ID without testing won’t activate the telemetry link, and power cycling resets devices but doesn’t complete the arming sequence.