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210-065 · Question #245

Your customer reports that new A/V equipment that plays movies cannot be displayed on their Cisco TelePresence endpoints. This A/V equipment is connected to the Cisco TelePresence codec via an HDMI…

The correct answer is C. The A/V gear is using HDCP to prevent illegal copying. HDCP (High-bandwidth Digital Content Protection) embedded in the HDMI signal from new movie-playing A/V equipment prevents Cisco TelePresence codecs from displaying the content.

Endpoint Troubleshooting

Question

Your customer reports that new A/V equipment that plays movies cannot be displayed on their Cisco TelePresence endpoints. This A/V equipment is connected to the Cisco TelePresence codec via an HDMI cable. However, older A/V gear that uses composite cables is able to display content. What is most likely the cause of this issue?

Options

  • AThe composite cables are faulty.
  • BTIP negotiation is failing between the A/V gear and the Cisco TelePresence device.
  • CThe A/V gear is using HDCP to prevent illegal copying.
  • DThe operating system for the A/V gear is not compatible with the operating system of the

How the community answered

(28 responses)
  • A
    4% (1)
  • B
    11% (3)
  • C
    71% (20)
  • D
    14% (4)

Why each option

HDCP (High-bandwidth Digital Content Protection) embedded in the HDMI signal from new movie-playing A/V equipment prevents Cisco TelePresence codecs from displaying the content.

AThe composite cables are faulty.

The composite cables are confirmed functional because older A/V gear successfully displays content through them, ruling out cable faults as the cause.

BTIP negotiation is failing between the A/V gear and the Cisco TelePresence device.

TIP (TelePresence Interoperability Protocol) governs video conferencing session negotiation between endpoints and is unrelated to local HDMI content playback from an A/V source.

CThe A/V gear is using HDCP to prevent illegal copying.Correct

HDCP is a digital rights management protocol that encrypts HDMI video signals to prevent unauthorized copying of protected content such as commercial movies. Cisco TelePresence codecs do not implement HDCP decryption, so the handshake fails and no video is displayed, while analog composite connections carry no HDCP protection and therefore work without issue.

DThe operating system for the A/V gear is not compatible with the operating system of the

Operating system compatibility is irrelevant to HDMI signal passthrough; the codec processes the digital video signal directly and does not interact with the source device's operating system.

Concept tested: HDCP protection blocking TelePresence HDMI content display

Source: https://www.cisco.com/c/en/us/support/collaboration-endpoints/telepresence-ex-series/series.html

Topics

#HDCP#HDMI#content sharing#A/V compatibility

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