Huawei H11-861_V4.0 - HCIP-Collaboration V4.0

In H.323, when a gatekeeper needs to locate an endpoint outside its zone, it issues a LocationRequest (LRQ) to the neighboring gatekeeper to retrieve the called party’s address.

A SIP response start line is a Status-Line containing the SIP version, status code, and reason phrase - not the method and Request-URI.

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.

The Diagnostic Information Collection feature in the SMC web UI gathers logs and status from managed hardware network elements, such as SMC-connected SC nodes, RSE8800 recording engines, and Box 310 endpoints, by selecting their device types in Maintenance > Diagnostic Info Collection. It does not support collecting diagnostic data from software clients like Huawei CloudLink.

The H.26x family (H.263, H.264/AVC, H.265/HEVC) was designed with low-latency, real-time encoding/decoding in mind (ideal for videoconferencing and streaming calls) whereas MPEG-1/2/4 were originally optimized for file-based storage (VCD/DVD), broadcast and progressive streaming. Modern deployments often blend these. For example, using H.265 for both live calls and high-efficiency streaming and newer standards (like H.266/VVC) are now emerging.

The Via header records each hop a request takes and is used to route the corresponding response back along the same path.

YUV 4:2:0 subsamples chroma by a factor of two in both horizontal and vertical dimensions, reducing total data to half of the full-resolution YUV 4:4:4 format.

In SFU+IAU mode, the IAU’s re-encoded (decoded and encoded) streams are identified by the MpAdaptStrmNo value under Site(18). In the output, MpAdaptStrmNo[2710124429803] is the stream number carrying all three re-encoded video channels.

With signaling routing enabled on the SC, both the H.225 call signaling and the H.245 control channel are each split into two TCP legs (T1→SC and SC→T2), resulting in 2 × 2 = 4 TCP connections.