Data Sheet
June 2002
TMXF28155 Supermapper
155/51 Mbits/s SONET/SDH x28/x21 DS1/E1
12 28-Channel Framer Registers (continued)
Table 434. FRM_ARLR2, Arbiter Link Register 2 (R/W) (continued)
Address*
Bit
Name
Function
Reset
Default
0x8LPF1
10:8
FRM_LF_CRT[2:0] Loss of Frame Criteria.
0
DS1 Mode:
000 = 2 errored framing bits out of 4 FT and FS bits.
001 = 2 errored framing bits out of 5 FT and FS bits.
010 = 2 errored framing bits out of 6 FT and FS bits.
011 = 3 errored framing bits out of 12 FT, Fs, and channel
24 FAS bits (DDS only).
100 = 2 errored framing bits out of 4 FT bits only.
101 = 2 errored framing bits out of 5 FT bits only.
110 = 2 errored framing bits out of 6 FT bits only.
111 = 4 errored framing bits out of 12 FT, FS, and channel
24 FAS bits (DDS only).
CEPT Mode:
000 = 3 consecutive errored FAS patterns.
x01 = 3 consecutive errored FAS patterns or 3 consecu-
tive errored NOTFAS bits (bit 2).
x10 = 3 consecutive errored frames (FAS and NOTFAS).
Others are reserved.
7
6
RSVD
Reserved. Must write to 0.
Auto AIS.
0
0
FRM_AUTO_AIS
0 = AUTO AIS is disabled.
1 = AUTO AIS is enabled.
When AUTO AIS is enabled, the receive arbiter data is
forced to 1 when out of frame.
5:4 FRM_RAIL3_DEC[1:0] Third Rail Option.
00 = third input signal to the frame aligner is ignored.
0
01 = third input is bipolar violations (in the CMI mode,
CRVs are also included on the RBPV input, but not
passed through the frame aligner).
10 = third rail is frame sync used to indicate time-slot
alignment. The multiframe alignment is determined
by the frame sync.
11 = third rail is frame sync used to indicate framing bit
position. Multiframe alignment is searched for
expedited by the frame sync.
* See Table 429 on page 298 for values of L and P.
Agere Systems Inc.
303
ETC [ ETC ]
