EXFO FTB-1, User Manual

Page: 493 / 675

Test Functions
NetBlazer
481
OH - OTN
OH - OTN
From the
Test
menu, tap
Functions
, and the
OH
tab.
TX and RX buttons
Allows to respectively modify (
TX
button) the overhead information to be
transmitted or to view ( RX button) the overhead information received.
Default OTN OH
Returns all TX overhead bytes to their factory default values.
TX/RX
Overhead bytes are organized using rows and columns structure as per
G.709 standard.
Row 1

OA1
and
OA2
, columns 1-6, OTU FAS: All the Frame Alignment Signal
OA1 bytes and OA2 bytes are individually configurable from 00 to FF .
The default values are
F6
for all
OA1
bytes and
28
for all
OA2
bytes.

MFAS , column 7, OTU MFAS: The Multi-Frame Alignment Signal byte is
not configurable.

SM , columns 8-10, OTU OH: The Section Monitoring contains the
following bytes.
The first SM byte (column 8) contains the TTI multiframe byte that is
only configurable from
Traces (OTN)
on page 281.
The second SM byte (column 9) contains the BIP-8 byte that is
automatically generated for each frame. This byte is not configurable.