Confirmed with excellent detail from Cisco's official documentation. Here's the accurate version:

The Cisco STACK-T1-50CM= is a 50cm Type 1 StackWise-480/StackWise-1T stacking cable assembly, designed to physically interconnect Cisco Catalyst 3850 and Catalyst 9300 Series switches into a single logical switching unit. This cable delivers a full-duplex stack bandwidth of 480 Gbps, enabling multiple switches to behave as one unified switch while maintaining low-latency, high-throughput inter-switch communication for stackable campus access layer deployments.

Key Features & Benefits

• 480 Gbps StackWise Bandwidth: Delivers full-duplex stacking speeds of up to 480 Gbps, enabling low-latency, high-throughput communication between stacked switches.
• Compact 50cm Length: Optimized for same-rack or directly adjacent switch installations, reducing cable clutter in dense campus access layer deployments.
• Broad Stack Scalability: Supports stacking of multiple switches into a single logical unit (up to 8-9 switches depending on platform), simplifying management and enabling seamless switch additions, deletions, and redeployment without interruption.
• Catalyst 3850/9300 Compatibility: Specifically designed for the Cisco Catalyst 3850 and Catalyst 9300 Series switches using the StackWise-480/StackWise-1T stacking architecture.
• Locking Connector Design: Features a secure, vibration-resistant connector design with thumbscrews, ensuring reliable physical connections in demanding rack environments.
• Simplified Network Management: Allows a stack of switches to behave and be managed as a single switch, streamlining configuration and reducing complexity in campus network deployments.

Technical Specifications