1 Scope
2 References
3 Conventions
4 Capabilities and "selected" communication modes
5 Initialization procedures for establishing communication between
standard terminals and an MCU
5.1 First terminal added to conference
5.2 Second terminal added to conference
5.3 Third terminal added to conference
5.4 Fourth and subsequent calls added to conference
5.5 Extension to multiple channels
5.6 Other standard terminals
5.7 MCU-MCU interconnections
5.7.1 Initialization
5.7.2 Designation of master MCU
5.8 Closure of conference
5.9 User-initiated connection establishment
6 Video switching and mixing
6.1 Video switching procedure
6.1.1 No video mixing
6.1.2 With video mixing
6.2 Video mixing
6.2.1 Methods of image arrangement
6.2.2 Procedures for video mixing
6.2.3 Interactions with MCV
6.2.4 Interactions with VCS
6.2.5 Interactions with chair control
6.3 Automatic switching and visualization-forcing
6.3.1 Video Command Broadcast (VCB)
6.3.2 Multipoint Command Visualization (MCV)
6.3.3 Video Command Select (VCS)
7 Numbering of terminals
7.1 Numbering method
7.2 Terminal-MCU interconnection
7.2.1 Terminal/MCU interactions without call association
7.2.2 Terminal/MCU interactions with call association
7.2.3 Passwords and conference identifiers
7.3 MCU interconnection
7.3.1 Master MCU has been designated
7.3.2 No master MCU has been designated
7.4 Terminal identity information
7.4.1 Terminal identity using Table 3 of ITU-T H.230
(ASCII) defined characters
7.4.2 Terminal identity using ISO/IEC 10646 (Unicode)
defined characters
7.4.3 Backward compatibility requirements
8 Mode switching and data broadcast procedures
8.1 General mode switching
8.1.1 Bit-rate symmetry
8.1.2 Video mode switching without bit-rate switching
8.1.3 Restricted networks and bit-rate symmetry
8.1.4 Changing the video bit rate
8.1.5 Mode changes in multi-MCU calls
8.2 Mode switching for data distribution in multipoint conferences
8.2.1 General HSD/LSD provisions
8.2.2 Data tokens for HSD/LSD operations
8.2.3 Opening/closing/rate changing the LSD/HSD data
channel
8.2.4 Opening/closing/rate changing the MLP data channel
8.2.5 Data tokens for H.224 in the MLP channel (new)
9 Chair-control procedure using BAS codes
9.1 General
9.2 Assignment, release and withdrawal of chair-control token
9.2.1 Assignment
9.2.2 Release of chair token
9.2.3 Withdrawal of chair-control token
9.3 Information available to the chair-control terminal
9.4 Video selection
9.4.1 Chair-control of broadcast video
9.4.2 Chair-control of video received at TM
9.5 Terminal dropping by chair-control
9.6 Withdrawal of data tokens by chair-control
9.7 Request for floor
9.8 Dropping the entire conference
9.8.1 Identification of token assignment
10 BAS sequencing
11 Capability exchange during a call
12 Procedure for loop detection at an MCU
13 Exceptional procedures
13.1 A terminal connected does not indicate capability for the SCM
13.2 Contention resolution principle
14 MCU loopback procedures
15 Interactions with T.120 control
15.1 Chair-control interactions
15.2 Interactions with passwording
15.3 Interactions with TIX/TIA
15.4 Interactions with SCM management
15.4.1 Interactions with video mixing
15.5 Rate matching in a cascade
Appendix I – C&I signals defined in [ITU-T H.230]
Appendix II – Mandatory and optional codes for MCUs