tmxf28155 ETC-unknow, tmxf28155 Datasheet - Page 277

• Manufacturer Part Number: tmxf28155
• Description: Tmxf28155 Super Mapper 155/51 Mbits/s Sonet/sdh X28/x21 Ds1/e1
• Manufacturer: ETC-unknow

Preliminary Data Sheet
May 2001
12 28-Channel Framer Registers
Table 385. FRM_PMLR4, Performance Monitor Link Register 4 (COR) (continued)
* See
Agere Systems Inc.
Address*
0x8LP83
Table 381
for values of L and P .
Bit
10
FRM_AIS
Name
Alarm Indication Signal. A 1 indicates the framer is currently
receiving an AIS pattern or receiving an AIS indication on the
TDM bus from the mapper.
DS1: Option 0: AIS occurs upon detection of an unframed sig-
nal with a ones density of at least 99.9% for a time between
3 ms and 75 ms. AIS is removed if the signal does not meet the
99.9% ones density or the unframed criteria for a period
between 3 ms and 75 ms. ( ANSI T1.231 section 6.1.2.2.3,
T1.403 section H, G.775 section 5.4.)
Option 1: AIS is detected if the signal has one or less zeros in
24 frames (3 ms/4632 bits). AIS is removed if the signal has two
or more zeros in 24 frames. ( ANSI G.775 section I.2.)
CEPT: Option 0:AIS is detected when loss of frame alignment
occurs and there are two or less zeros in a double frame period
(512 bits per double frame period). AIS is cleared on receipt of a
signal not conforming to the AIS defect criteria. ( ANSI G.775
section I.2; G.965 section 16.1.2.)
Option 1: AIS is detected when there are two or fewer zeros in
each of two consecutive double frame periods (512 bits per
double frame period). AIS is cleared when each of two consecu-
tive double frame periods contain three or more zeros or the
frame alignment signal (FAS) is found. ( ANSI G.775 section
5.2.)
Option 2: AIS is detected when there are three or less zeros in a
four frame period (0.5 ms/1024 bits) and the signal is out of
frame. AIS is cleared if there are four or more zeros in a four-
frame period or the signal is in frame alignment. ( ANSI G.775
section I.2.)
Option 3: AIS is detected when there are one or fewer zeros in
each of two consecutive double frame periods (512 bits per
double frame period) and the FAS is not detected. AIS is
cleared when each of two consecutive double frame periods
contain three or more zeros or the frame alignment signal (FAS)
is found. ( ANSI G.775 section I.2.)
(continued)
155/51 Mbits/s SONET/SDH x28/x21 DS1/E1
Function
TMXF28155/51 Super Mapper
Default
Reset
0
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