EXFO IQS-8100 Series Transport Blazer for IQS-600 - Manual (Page 359)

SDH Tabs
SONET/SDH Application 345
HOP OH TX/RX (SDH)
The following section overhead byte values are displayed in hexadecimal
format. However, a common field allows to see the value of specific byte in
binary format. Click on the blue label of a byte and its binary value will be
displayed in the common field beside the Timeslot selection.
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J1: Trace. J1 is only available when Enable Trace from the HOP TX
(SDH) on page 335 is disabled.
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B3: BIP-8. This byte is not programmable from the HOP OH TX tab.
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C2: Path Signal Label. Entering a C2 byte will automatically update the
Path Signal Label (C2) selection and vice versa.
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G1: Path Status
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F2: User Channel
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H4: Multiframe Indicator. This byte is not programmable with LOP or
VCAT.
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F3: User Channel
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K3: Automatic Protection Switching (APS)
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N1: (Network operator byte) Tandem Connection Monitoring (TCM)