VSC6134
Datasheet
Table 34. Maintenance Block I/O Description (continued)
Name
Direction
Function
d_los
IN
IN
IN
Loss of signal from the backwards path.
Automatically insert ODUk AIS on loss of frame.
mxlofais
mxlofdais
Automatically insert ODUk AIS on loss of frame from the backwards
path.
mxoduais
mxlofgais
mxlosgais
mxgenais
mxlosoci
mxlosdoci
IN
IN
IN
IN
IN
IN
Insert ODUk AIS.
Automatically insert generic AIS on loss of frame.
Automatically insert generic AIS on loss of signal.
Insert generic AIS.
Automatically insert ODUk OCI on loss of signal.
Automatically insert ODUk OCI on loss of signal from the backwards
path.
mxoduoci
mxodulck
mxtstnull
mxtstprbs
add_stuff_dis
nfa
IN
IN
IN
IN
IN
IN
IN
IN
IN
Insert ODUk OCI.
Insert ODUk LCK.
Insert null client.
Insert Test PRBS in the payload.
Disable stuff columns in the OTUk and operate in the legacy mode.
New frame alignment.
fstartin
Overhead sync marks the overhead words in the OTUk frame.
Data in.
data_in
txdata
OTUk overhead from the OTUk overhead generator. For more
information, see “Digital Wrapper Overhead (DWOH) Generator,”
page 85.
wraddrout
nfa_out
OUT
OUT
Write address out counts the words in an OTUk row (0 to 509).
New frame alignment out is aligned with the first word of the first row
of the OTUk frame.
oh_payload_we
OUT
Overhead/payload write enable is high when data_out is the OTUk
overhead or payload and low when the OTUk parity.
fsyncout
fstartout
data_out
OUT
OUT
OUT
Row start is aligned with the first word of each OTUk row.
Frame start out.
Data to RS encoders.
99 of 438
VMDS-10185 Revision 4.0
July 2006
VITESSE [ VITESSE SEMICONDUCTOR CORPORATION ]
