TFRA08C13 Datasheet, PDF (44/188 Pages) Agere Systems – TFRA08C13 OCTAL T1/E1 Framer

TFRA08C13 OCTAL T1/E1 Framer
Preliminary Data Sheet
October 2000
Frame Formats (continued)
16-State Signaling
The default signaling mode while in SLC-96 framing is 16-state signaling. SLC-96 16-state signaling is enabled by
setting both the F and G bits in the signaling registers to the 0 state, setting the SLC-96 signaling control register
FRM_PR43 bit 3 and bit 4 to 0, and setting register FRM_PR44 bit 0 to 0. Table 18 shows the state of the transmit-
ted signaling bits to the line as a function of the A-, B-, C-, and D-bit settings in the transmit signaling registers. In
Table 18 below, under Transmit to the Line Signal Bits, A and B are transmitted into one SLC-96 12-frame signaling
superframe, while A’ and B’ are transmitted into the next successive SLC-96 12-frame signaling superframe.
In the line receive direction, this signaling mode functions identically to the preceding transmit path description.
The signaling mapping of this 16-state signaling mode is equivalent to the mapping of the SLC-96 9-state signaling
mode.
Table 18. 16-State Signaling Format
Transmit Signaling Register Settings
Transmit to the Line Signal Bits
SLC-96 Signaling States
A
B
C
D
A
B
A’
B’
State 0
State 1
State 2
State 3
State 4
State 5
State 6
State 7
State 8
State 9
State 10
State 11
State 12
State 13
State 14
State 15
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
1
0
0
1
0
0
0
1
0
0
0
1
1
0
0
1
1
0
1
0
0
0
1
0
0
0
1
0
1
0
1
0
1
0
1
1
0
0
1
1
0
0
1
1
1
0
1
1
1
1
0
0
0
1
0
0
0
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
1
1
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
1
1
0
1
1
1
1
0
1
1
1
0
1
1
1
1
1
1
1
1
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