PMC-Sierra manual PM5349 S/UNI-QUAD

			PMC-Sierra, Inc.		PM5349 S/UNI-QUAD
S/UNI-QUAD
DATASHEET
PMC-971239			ISSUE 6	SATURN USER NETWORK INTERFACE (155-QUAD)
			majority of I bits inverted + previous NDF_enable, inc_ind
			or dec_ind more than 3 frames ago
	inv_point		not any of above	(i.e., not norm_point, and not
			NDF_enable, and not AIS_ind, and not inc_ind and not
			dec_ind)
	new_point		disabled_NDF + ss + offset value in range of 0 to 782 but
			not equal to active offset
	inc_req		majority of I bits inverted + no majority of D bits inverted
	dec_req		majority of D bits inverted + no majority of I bits inverted
	Note 1.-	active offset is defined as the accepted current phase of the SPE
		(VC) in the NORM_state and is undefined in the other states.
	Note 2 -	enabled NDF is defined as the following bit patterns: 1001, 0001,
		1101, 1011, 1000.
	Note 3 -	disabled NDF is defined as the following bit patterns: 0110, 1110,
		0010, 0100, 0111.
	Note 4 -	the remaining six NDF codes (0000, 0011, 0101, 1010, 1100, 1111)
		result in an inv_point indication.
	Note 5 -	ss bits are unspecified in SONET and has bit pattern 10 in SDH
	Note 6 -	the use of ss bits in definition of indications may be optionally
		disabled.
	Note 7 -	the requirement for previous NDF_enable, inc_ind or dec_ind be
		more than 3 frames ago may be optionally disabled.
	Note 8 -	new_point is also an inv_point.
	Note 9 -	LOP is not declared if all the following conditions exist:
		• the received pointer is out of range (>782),
		• the received pointer is static,
		• the received pointer can be interpreted, according

to majority voting on the I and D bits, as a positive or negative justification indication,

• after making the requested justification, the received pointer continues to be interpretable as a

pointer justification.

Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use 40