
DATASHEET
PM5349 S/UNI-QUAD
ISSUE 6 | SATURN USER NETWORK INTERFACE | |
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H1, H2: The pointer value bytes locate the path overhead column in the SONET/SDH frame.
H3:The pointer action bytes contain synchronous payload envelope data when a negative stuff event occurs. The all zeros pattern is inserted in the transmit direction. This byte is ignored in the receive direction unless a negative stuff event is detected.
B2:The line bit interleaved parity bytes provide a line error monitoring function.
K1, K2: The K1 and K2 bytes provide the automatic protection switching channel. The K2 byte is also used to identify line layer maintenance signals. Line RDI is indicated when bits 6, 7, and 8 of the K2 byte are set to the pattern '110'. Line AIS is indicated when bits 6, 7, and 8 of the K2 byte are set to the pattern '111'.
S1:The S1 byte provides the synchronization status byte. Bits 5 through 8 of the synchronization status byte identifies the synchronization source of the
M1:The M1 byte is located in the third
Path Overhead Bytes
J1:This byte is set to transmit continuous null characters. Null is defined as the ASCII code, 0x00.
B3:The path bit interleaved parity byte provides a path error monitoring function.
C2:The path signal label indicator identifies the equipped payload type. For ATM payloads, the identification code is 0x13
G1:The path status byte provides a path FEBE function, and a path remote defect indication function. Three bits are allocated for remote defect indications: bit 5 (the path RDI bit), bit 6 (the auxiliary path RDI bit) and bit 7 (Enhanced RDI bit). Taken together these bits provide a eight state path RDI code that can be used to categorize path defect indications.
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