H11-861_V4.0 HCIP-Collaboration V4.0 Questions and Answers

Huawei’s SMC supports cascading up to four conference levels for multi-level conferencing, ensuring efficient management and control across up to four tiers.

The generic conf get [confNum] command retrieves comprehensive details for the specified conference, whereas the other commands show only specific aspects (IAU resources, stream info, or channel info).

While SIP is transport-agnostic and can run over UDP, TCP, TLS, or SCTP, UDP remains the predominant transport - SCTP is not the most commonly used.

If the input volume falls below the echo canceller’s detection threshold, the device can’t identify and suppress return audio, leading to echoes or squealing.

An audio loop, where output is fed back into the input, directly causes echo and feedback noise.

Placing the microphone too close to the speaker allows direct pickup of its output, resulting in echo and potential high-pitched feedback.

H.225 RAS messages (registration, admission, status) always traverse the SC (gatekeeper) for endpoints in the same zone.

RTP media is exchanged directly between T1 and T2 once the call is established.

The call control sequence involves H.225 RAS (registration/admission), H.225 call signaling (SETUP/CONNECT), and H.245 control for capabilities.

By default, a Registration SC server supports up to 20,000 registered devices, as specified in the Huawei SC product specifications.

System administrator accounts in the SMC are management-only and do not support binding to endpoints for use as conference-joining devices; endpoint binding applies only to conference user or room accounts.

When cascading an old-architecture MCU with a new-architecture MCU, only the proxy channel on the new side consumes bandwidth and codec resources - the legacy MCU’s cascading channel is not used.

SIP relies on SDP for session description in multimedia calls; it cannot negotiate media parameters independently of SDP.

In a small- and medium-sized deployment with SMC and SC co-deployed on the same server, a single device supports up to 1,000 concurrent calls.

BFCP transport must match between the MCU and endpoints; if the MCU is configured for TCP, endpoints must also use TCP for BFCP.

The collaboration hardware platform implements full redundancy: network ports, fans, power supplies, and disks (RAID) - to ensure high availability and fault tolerance.

An RRQ conveys the endpoint’s network address information (IP address and associated port number) along with its H.323 ID alias to the gatekeeper for registration.

Uncompressed 1080p at 60 fps has 1920 × 1080 = 2,073,600 pixels per frame. At 24 bits per pixel, that’s 2,073,600 × 24 = 49,766,400 bits per frame. Multiplied by 60 fps gives 2,985,984,000 bit/s, which is approximately 2986 Mbit/s.