PM5363 TUPP+622
TUPP+622
DATASHEET
PMC-1981421
ISSUE 4
SONET/SDH TRIBUTARY UNIT PAYLOAD PROCESSOR FOR 622 MBIT/S
INTERFACES
ES_lowerT:
ES filling is below the lower threshold + previous
inc_ind,dec_ind or NDF_enable more than three frames ago.
ES_upperT:
ES filling is above the upper threshold + previous inc_ind,
dec_ind or NDF_enable more than three frames ago.
FO_discont:
PI_AIS:
frame offset discontinuity
PI in AIS state
PI_LOP:
PI_NORM:
Notes
PI in LOP state
PI in NORM state
1. A frame offset discontinuity occurs if an incoming NDF enabled is received, or
if an elastic store overflow/underflow occurred.
2. Transition to AIS state due to PI_LOP event may be optionally disabled.
The autonomous transitions indicated in the state diagram are defined as follows:
inc_ind:
transmit the pointer with NDF disabled and inverted I bits,
transmit a stuff byte in the byte after H3, increment active
offset.
dec_ind:
transmit the pointer with NDF disabled and inverted D bits,
transmit a data byte in the H3 byte, decrement active offset.
NDF_enable:
accept new offset as active offset, transmit the pointer with
NDF enabled and new offset.
norm_point:
AIS_ind:
transmit the pointer with NDF disabled and active offset.
active offset is undefined, transmit an all-1's pointer and
payload.
Notes:
1.
Active offset is defined as the phase of the SPE (VC).
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
99
PMC [ PMC-SIERRA, INC ]
