IP & LAN Standards
- T.120 Standards
- Definition: Defines protocols and services for real-time, multi-point data communications. Applications of these protocols include desktop video conferencing, whiteboard image sharing, and still image exchange. The standards family include:
T.120: System model.
T.121: Generic applications.
T.122: Multi-point communication services.
T.123: Audiographic and audiovisual applications.
T.124: Generic conference control.
T.125: Multi-point communication service protocol.
T.126: Multi-point still image protocol.
T.127: Multi-point binary file transfer protocol.
- G.700 Standards
- Definition: Defines technical aspects for terminal equipment. The equipment included are coders, decoders, and devices that transform analog voice signals into digital pulse streams. The transmission speed are specified as follows:
G.711: 64K bit/sec
G.722: 48K, 56K, and 64K bit/sec
G.728: 14K bit/sec
G.729: 8K bit/sec
G.723.1: 5.3K and 6.3K bit/sec
- H.320 Standards
- Definition: Governs basic video telephone communications over point-to-point and multi-point connections. The H.320 series includes the following network types:
H.320: Narrowband (1.92Mbps) visual telephone systems.
H.323: Packet-based multimedia systems.
H.324: Audio and video compression over modem connections.
H.225: Specifies call control.
H.261 & H.263: Specifies video codec operations.
Extracted from Network World, August 10, 1998, "IP Convergence" page 60.
Date of last revision: 17 December 2001.