ODTU12 (PT=20)ODTU12 (PT=20) : Supports 2.5G Tributary Slot (TS).
ODTU12 (PT=21)ODTU12 (PT=21) : Supports 1.25G Tributary Slot (TS).
ODTU01ODTU01 : Supports 1.25G Tributary Slot (TS).
Multiplexing 2Multiplexing 2
Applicable when there are three levels of multiplexing. Defines into which
higher order ODU is multiplexed.
NoneNone
ODTU2.1ODTU2.1 : One 1.25G Tributary Slot (TS) can be selected.
ODTU12 (PT=20)ODTU12 (PT=20) : Supports 2.5G Tributary Slot (TS).
ODTU12 (PT=21)ODTU12 (PT=21) : Supports 1.25G Tributary Slot (TS).
ODTU01ODTU01 : Supports 1.25G Tributary Slot (TS).
Multiplexing 3Multiplexing 3
Applicable when Output signal is OTU4 or OTU3.
NoneNone
ODTU01ODTU01 : Supports 1.25G Tributary Slot (TS).
77..11..11..44 OverheadOverhead
Touching an OHOH button in the setup area of the Ports SetupPorts Setup screen launches a
dialog box similar to the one shown below.
This dialog box presents detailed information about the overhead and allows
you to configure it. Blue fields are OTU overhead. Green fields except FAS and
MFAS are ODU overhead. Orange fields are OPU overhead.
The actual layout of the dialog box depends on which overhead you are
configuring. The description below provides a general description of the OTN
overhead.
The overhead consists of the following parameters:
FAS, which is the signal for the frame alignment.
MFAS, which is the signal for the multiframe alignment.
SM, which shows the Signal Monitoring.
GCC0-GCC2, which shows the General Communication Channel.
RES, which is the reserved for future international standardization.
TCM1-TCM6, which shows the Tandem Connection Monitoring.
FTFL, which shows the Fault Type and Fault Location.
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