
PM5317 SPECTRA-9953 Telecom Standard Product Data Sheet
Release
Proprietary and Confidential to PMC-Sierra, Inc., and for its customers’ internal use.
Document No.: PMC-2000741, Issue 5
116
PI_AIS:
PI in AIS state
PI_LOP:
PI in LOP state
PI_NORM:
PI in NORM state
Note
1. A frame offset discontinuity occurs if an incoming NDF enabled is received, or if an ES
overflow/underflow occurred.
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:
Transmit the pointer with NDF disabled and active offset.
AIS_ind:
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).
2. The ss bits are undefined in SONET, and has bit pattern 10 in SDH
3. Enabled NDF is defined as the bit pattern 1001.
4. Disabled NDF is defined as the bit pattern 0110.
14.16 System Side Interfaces
In single STS-192/STM-64 mode, the system side interface supports a 777.6 MHz 16-bit serial
8B/10B encoded TelecomBus interface. Each serial line carries an STS-12/STM-4 data stream.
For an STS-192 (STM-64) receive stream, the sixteen constituent STS-12/STM-4 #1 - #16 are
provided at the DD1[0]+/-, DD1[1]+/-, DD1[2]+/-, DD1[3]+/-, DD2[0]+/-, DD2[1]+/-,
DD2[2]+/-, DD2[3]+/-, DD3[0]+/-, DD3[1]+/-, DD3[2]+/-, DD3[3]+/-, DD4[0]+/-, DD4[1]+/-,
DD4[2]+/-, DD4[3]+/- LVDS serial links respectively. For an STS-192 (STM-64) transmit
stream, the sixteen constituent STS-48/STM-4 #1 - #16 are accepted at AD1[0]+/-, AD1[1]+/-,
AD1[2]+/-, AD1[3]+/-, AD2[0]+/-, AD2[1]+/-, AD2[2]+/-, AD2[3]+/-, AD3[0]+/-, AD3[1]+/-,
AD3[2]+/-, AD3[3]+/-, AD4[0]+/-, AD4[1]+/-, AD4[2]+/-, AD4[3]+/- LVDS serial links
respectively. As per SONET/SDH the STS-12/STM-4 constituents of an STS-192/STM-64 are
four bytes interleaved as shown in Figure 17.