What type of system is the TRULINK and how many channels does it have?

• A. A Half duplex intercom system with 25 channels
• B. A Full duplex intercom system with 50 channels
• C. A Digital telephone switch with 100 lines
• D. An Analog intercom with 12 channels

Answer: (B)

TRULINK is an intercom system designed for concurrent two-way communication. Full duplex means you can talk and listen at the same time, without needing to press a button to switch directions, which is essential for smooth, real-time coordination. Adding 50 channels provides many independent two-way paths for different groups or lines to operate simultaneously, maximizing capacity and reducing wait times for conversations. That combination—full duplex operation with 50 channels—best fits the description. The other descriptions don’t match: a half duplex setup wouldn’t allow simultaneous talk/listen, a digital telephone switch describes a different kind of device, and an analog intercom with only 12 channels wouldn’t offer as much simultaneous capacity.