VeEX VePAL TX300M, User Manual

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9.0 OTN Tools
9.1 Shortcuts
Accessing OTN Tools
On the TX300, tap on Home (main menu) >
Advanced Mode
>
OTN Tools
On the TX300e, tap on Home (main menu) >
OTN Tools
OTN Tools Menu
Overhead Analyzer:
Displays the Optical Channel Transport Unit (OTU)
Displays Optical Channel Data Unit (ODU)
Displays Optical channel Payload Unit (OPU) bytes of the received channel
Overhead Generator:
Used to edit Optical channel Transport Unit (OTU)
Used to edit Optical Channel Data Unit (ODU)
Used to edit Optical Channel Payload Unit (OPU) bytes of the transmitted channel
Trail Trace Identifier:
TTI is similar to the J0 byte in SONET/SDH. It is used to identify the signal from the source to the destination within
the network.
TTI contains the so called Access Point Identifiers (API) which are used to specify the Source Access Point
Identifier (SAPI) and Destination Access Point Identifier (DAPI).
The APIs contain information regarding the country of origin, network operator and administrative details.
Payload Structure Identifier:
PSI field transports a 256-byte message aligned with the ODU multiframe.
PSI0 contains the Payload Type (PT) identifying the payload being transported.
The OPU Payload Type (PT) is a single byte defined within PSI to indicate the composition of the OPU
signal, or in other words, the type of payload being carried in the OPU.
TCM Tasks:
Used to analyze or edit the sequence of TCMi (i = 1 to 6) bytes by generating alarms and errors in the Tandem
connection sub-layer.
TX300S_e-manual_D07-00-064P_RevA00