1 Scope
2
References
3
Definitions
4
Abbreviations
5
DCME frame structure
5.1 General
5.1.1 Supported services
5.1.2 PCM frame
5.1.3 DCME frame
5.1.4 DCME multiframe
5.1.5 16 kbit/s DCME frames
6
Bearer frame structure
6.1 Cliques, destinations and bearers
6.1.1 Number of cliques
6.1.2 Number of destinations
6.1.3 Multiple outgoing bearers
6.2 Assignment Messages (AM)
6.3 Bearer Channels (BC)
6.4 Control Channel (CC)
6.5 BC numbering and the use of the bearer frame
6.5.1 8-bit (64 kbit/s transparent calls) BCs
6.5.2 5-bit (VBD optimized 40 kbit/s LD-CELP)
BCs
6.5.3 4-bit BCs (BB, FB)
6.5.4 Normal range 2-bit BCs (LD-CELP voice)
6.5.5
Overload BCs
6.5.6 Pre-assigned BCs
7
Control channel
7.1 General
7.2 Number of assignment messages
7.2.1 Single/double AM mode criterion
7.2.2 Total number of assignment messages
7.3 Control channel content
7.3.1 CC synchronization
7.3.2 Assignment messages
7.3.3 Asynchronous data word
7.3.4 Error correction
7.4 CC message transmission scheme
7.4.1 Control channel structure
7.4.2 CC bit mapping
8
Variable bit rate and overload channel creation
8.1 Principles
8.1.1 Creation
of 16 kbit/s channels
8.1.2 Creation of 12.8 kbit/s channels
8.1.3 Creation of 9.6 kbit/s channels
8.2 Overload channel creation
8.2.1 Notations
8.2.2
Packaging schemes
8.3 Overload channel creation process – The VBR scheme
8.3.1 VBR lists
8.3.2 Notations
8.3.3 VBR not required
8.3.4 VBR required
9
ABPS calculations
10 Channel check procedure
11 Facsimile
demodulation/remodulation
11.1 General
11.2 Facsimile blocks, facsimile transport channels and fax banks
11.3 Facsimile data channel
11.4 Facsimile
control channel and forward error correction
11.5 FCC location on the bearer
12 System statistics measurement