Data Sheet
June 2002
TMXF28155 Supermapper
155/51 Mbits/s SONET/SDH x28/x21 DS1/E1
167
Agere Systems Inc.
10 VT/TU Mapper Registers
(continued)
Table 198. VT_SIGDEG_CTL1, Signal Degrade Control Register 1 (R/W)
Table 199. VT_SIGDEG_CTL2, Signal Degrade Control Register 2 (R/W)
Table 200. VT_SIGDEG_CTL3, Signal Degrade Control Register 3 (R/W)
Table 201. VT_SIGDEG_CTL4, Signal Degrade Control Register 4 (R/W)
Address
Bit
Name
Function
Reset
Default
0x00
0x0
0x200CF
15:12
11
RSVD
Reserved.
VT Signal Fail Clear.
Allows the signal fail algorithm to be
forced into the normal state. This is a one-shot which is
activated by a 0 to 1 transition.
VT Signal Fail Set.
Allows the signal fail algorithm to be
forced into the failed state. This is a one-shot which is
activated by a 0 to 1 transition.
Signal Degrade Clear.
Allows the signal degrade algo-
rithm to be forced into the normal state. This is a one-shot
which is activated by a 0 to 1 transition.
Signal Degrade Set.
Allows the signal degrade algorithm
to be forced into the failed state. This is a one-shot which
is activated by a 0 to 1 transition.
Reserved.
VT_BER_CH_SEL[4:0]
Bit Error Rate Monitor Channel Select.
Selects which
channel (1—28/21) is being monitored by the internal
BER monitor. Valid inputs are 00001—11100.
VT_SFCLEAR
10
VT_SFSET
0x0
9
VT_SDCLEAR
0x0
8
VT_SDSET
0x0
7:5
4:0
RSVD
000
0x00
Address
Bit
Name
Function
Reset
Default
0x0000
0x200D0
15:0
VT_SDNSSET[18:3]
Signal Degrade Ns Set.
Number of frames in a monitor-
ing block for SD.
Address
Bit
Name
Function
Reset
Default
0
0x00
0x200D1
15
14:7
RSVD
Reserved.
Signal Degrade M Set.
Threshold of the number of bad
monitoring blocks in an observation interval. If the number
of bad blocks is above this threshold, then signal degrade
SD is set.
Signal Degrade L Set.
Error threshold for determining if a
monitoring block is bad.
Signal Degrade Ns Set.
Number of frames in a monitor-
ing block for SD.
VT_SDMSET[7:0]
6:3
VT_SDLSET[3:0]
0x0
2:0
VT_SDNSSET[2:0]
0x0
Address
Bit
Name
Function
Reset
Default
0x0000
0x200D2
15:0
VT_SDBSET[15:0]
Signal Degrade B Set.
Number of monitoring blocks.