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Default all oh – EXFO FTB/IQS-85100G Packet Blazer for FTB-500/IQS-600 User Manual

Page 309

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Test Functions

Packet Blazer

299

OH - SONET/SDH

F3:

SDH only: User Channel. The Path User Channel provides a channel for
communication purposes between path elements and is payload
dependent.

K3:

SDH only: Automatic Protection Switching (APS). Bits 1 to 4 of the K3
byte are used for APS signaling. K3 bits 5 to 8 are reserved for future
use.

N1:

SONET: The N1 byte (formerly referred to as the Z5 byte) is allocated
for Tandem Connection Maintenance (TCM) and the Path Data
Channel.

SDH: (Network operator byte) The N1 byte is allocated to provide a
Higher-Order Tandem Connection Monitoring (HO-TCM) function.

Default all OH

Returns all TX overhead bytes to their factory default values.