SBSLITE Telecom Standard Product Data Sheet
Preliminary
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
Document ID: PMC-2010883, Issue 2
57
2. Note fractional rate links are symmetric in the transmit and receive direction over SBI336S. When using
clock slave mode with a fractional rate link the clock master makes single byte adjustments to the
slaves rate once per frame.
10.8.2 Serial TelecomBus 8B/10B Character Encoding
Table 22 shows the mapping of TelecomBus control bytes and signals into 8B/10B control
characters. When the TelecomBus control signals conflict each other, the 8B/10B control
characters are generated according to the sequence of the table, with the characters at the top of
the table taking precedence over those lower in the table.
Table 22 Serial TelecomBus Character Encoding
Code Group
Name
Curr. RD-
abcdei fghj
Curr. RD+
abcdei fghj
Encoded Signals
Description
High Order Path Termination (HPT) Mode
K28.5
001111 1010
110000 0101
IC1FP=’b1
IPL=’b0
C1FP frame and multiframe alignment
K28.0-
001111 0100
-
IPL=’b0
High-order path H3 byte position, no
negative justification event.
K28.0+
-
110000 1011
IPL=’b0
High-order path PSO byte position, positive
justification event.
K28.6
001111 0110
110000 1001
IC1FP=’b1,
IPL=’b1
High-order path frame alignment (J1).
Low Order Path Termination (LPT) Mode
K28.4+
-
110000 1101
ITAIS=’b1
Low-order path AIS.
K27.7-
110110 1000
-
IV5=’b1,
IDATA[0,4] = ERDI[1:0] = ‘b00, IDATA[5] =
REI = ‘b0
Low order path frame alignment. ERDI
and REI are encoded in the V5 byte.
K27.7+
-
001001 0111
IV5=’b1,
IDATA[0,4] = ERDI[1:0] = ‘b00, IDATA[5] =
REI = ‘b1
Low order path frame alignment. ERDI
and REI are encoded in the V5 byte.
K28.7-
001111 1000
-
IV5=’b1,
IDATA[0,4] = ERDI[1:0] = ‘b01, IDATA[5] =
REI = ‘b0
Low order path frame alignment. ERDI
and REI are encoded in the V5 byte.
K28.7+
-
110000 0111
IV5=’b1,
IDATA[0,4] = ERDI[1:0] = ‘b01, IDATA[5] =
REI = ‘b1
Low order path frame alignment. ERDI