What are the differences between GB/T 28281 and GB/T 28281+ used by the VCN3020?

GFP (an encapsulation protocol) defines two client signal adaptation modes: Frame-Mapped GFP (GFP-F): GFP-F is a PDU-oriented processing mode. It encapsulates the entire PDU into the GFP payload area and makes no modification on the encapsulated data. It determines whether to add a detection area for the payload area, depending on requirements. Transparent GFP (GFP-T): GFP-T is a block-code (8B/10B code block) oriented processing mode. It extracts a single character from the received data block and maps the character into the fixed-length GFP frame.

TTT-GMP and GFP-T are two encapsulation modes of GE services. They are different in physical clock synchronization modes and transcoding modes. GFP-T implements timing transparent transcoding (TTT). TTT-GMP complies with ITU-T G.709, and implements asynchronous transcoding.

QDR 40 GB/s IB cards and FDR 56 GB/s IB cards provide different transmission rates.

The difference between the V3 and T V2 storage is as follows: V3 upgrades the hardware architecture and provides new interface modules.

Differences between T.140 captions and non-T.140 captions 1. Non-T.140 captions are superimposed on the local video. T.140 captions are sent to the remote site individually, shown on the remote site display, rather than superimposed on the local video. 2. Non-T.140 captions can be delivered and received by SIP and H.323 endpoints. T.140 captions can be delivered and received by H.323 endpoints only. 3. The transmission of non-T.140 captions have no requirement on the endpoints at both sides. However, only when both the receiving and sending endpoints in the conference support T.140 captions, they can transmit T.140 captions. 4. The background management software RM cannot send non-T.140 captions. Only an endpoint can send non-T.140 captions. If both the receiving and sending endpoints support T.140 captions. T.140 captions can be sent from: Endpoint used at the chair site Endpoint with the MiniMCU RM