VeEX UX400, User Manual, Page: 119 / 209

For SDH:
Both AU-4 and AU-3 signal mappings per G.707 recommendations are supported. The multiplexing structure is shown below.
SDH Multiplexing Structure
AU4 Mapping:
VC4-64C, VC4-16C, VC4-4C, VC4, VC3, and VC12 are available.
AU3 Mapping:
VC3,VC12, and TU11/VC11 are available.
Bulk:
Tap the check box to enable the setting. In bulk mode, the entire VT container is filled with a test pattern per ITU-T 0.181 recommendations.
Tributary:
Preset to DS1, E1, DS3, and E3 depending upon the options and mapping.
Channel Selection:
The Tx channel is selected by entering the STM-N, TUG-3, TUG-2, and TU-12 numbers for the channel.
Note:
TUG:
A Tributary Unit Group is the structure generated by combining several lower level tributaries into the next higher level tributary
TU-12
: Each TU-12 frame consists of 36 bytes, structured as 4 columns of 9 bytes
At a frame rate of 8000Hz, these bytes provide a transport capacity of 2.304Mbps and accommodate the mapping of a 2.048Mbps signal
63 x TU-12s may be multiplexed into a STM-1 VC-4
The tributary numbering used above is per ITU-T G.707 standard.
The high order paths are named using a C, B, A convention as follows:
C: The AUG-4 are numbered 1 to 4
B: The AUG-1 are numbered 1 to 4
A: The AU-3 are numbered 1 to 3
Thus the naming convention per SDH rate is as follows:
For STM-16: [C, B, A] convention is used
For STM-4: [B, A] convention is used
UX400 10G e-Manual D07-00-058P RevA00 Page 119 of 209