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.

On first CLI login, you must change the default admin password to secure the SC; other network settings can be configured as needed afterward.

Alerting is part of the H.225 call-signaling sequence, not the RAS interface, so it is not used over the RAS channel.

In Manual dual-screen mode on the Box 310/610, you may select Single-screen or one of the two Extended modes (Extended mode 1 or Extended mode 2); Extended mode 3 is not supported.

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.