Test Functions
494 FTB-700G/800 Series
OH - SONET/SDH
M0 or M1 (SDH)
M0: MS-REI. STM-1 channel #1 of a STM-0e and STM-0 signal.
M1:MS-REI. STM-1 channel #1 of a STM-1e and STM-1 signal;
channel #3 of an STM-N signal (N>1).
Undefined “--” for all other channels not covered by M0, and M1.
E2: Orderwire. Provides a 64 Kbit/s voice channel for communication
between LTEs. This byte is only defined for the first STS-1/STM-1 frame
of a composite signal.
STS/AU/TU-3
J1: Trace. Available when the Trace format is set to 1 Byte (Refer to
Traces (SONET/SDH) on page 284).
SONET: The J1 Trace byte provides a 16 or 64 byte fixed string to verify
connection between path transmitting equipment and path receiving
equipment.
SDH: The higher-order (AU)/low-order (TU) VC-N path trace byte
provides a 64 byte fixed string to verify connection between path
transmitting equipment and path receiving equipment.
B3: BIP-8. The BIP-8 (Bit-Interleaved Parity) byte provides path error
monitoring. The byte is calculated by performing a even-parity check
over all bits of the previous SPE.
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