PMC-Sierra, Inc.
PRELIMINARY
PM5381 S/UNI-2488
DATASHEET
PMC-2000489
ISSUE 1
SATURN USER NETWORK INTERFACE FOR 2488 MBIT/S
Note 1:
enabled NDF is defined as the following bit patterns:
1001, 0001, 1101, 1011 and 1000.
Note 2:
the remaining eleven NDF bit patterns (0000, 0010, 0011, 0100,
0101, 0110, 0111, 1010, 1100, 1110, 1111) result in an INV_POINT
indication.
Note 3: dd bits are unspecified in SONET/SDH.
The transitions indicated in the state diagram are defined as follows:
3 X CONC_IND:
3 x AIS_IND:
three consecutive CONC indications
three consecutive AIS indications
8 x INV_POINT:
eight consecutive INV_POINT indications
Note 1: "consecutive event counters" are reset to zero on a change of state.
LOPC is declared on entry to the LOPC_state after eight consecutive pointers with values other
than concatenation indications
PAISC is declared on entry to the AISC_state after three consecutive AIS indications
10.5.3 Error Monitoring
The RHPP calculates the path BIP-8 error detection codes on the SONET (SDH) payloads. The
path BIP-8 code is based on a bit interleaved parity calculation using even parity. The calculated
BIP-8 codes are compared with the BIP-8 codes extracted from the B3 byte of the STS (VC)
payload of the following frame. Any differences indicate a path BIP-8 error. The RHPP
accumulates path BIP-8 errors in a microprocessor readable 16 bits saturating counter (up to 1
second accumulation time). Optionally, block BIP-8 errors can be accumulated.
The RHPP extracts the path remote error indication (REI-P) errors from bits 1, 2, 3 and 4 of the
path status byte (G1) and accumulates them in a microprocessor readable 16 bits saturating
counter (up to 1 second accumulation time). Optionally, block block REI errors can be
accumulated.
The RHPP monitors the path signal label byte (C2) payload to validate change in the accepted
path signal label (APSL). The same PSL byte must be received for three or five consecutive
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PMC [ PMC-SIERRA, INC ]
