Preliminary Data Sheet
May 2001
TMXF28155/51 Super Mapper
155/51 Mbits/s SONET/SDH x28/x21 DS1/E1
Agere Systems Inc.
601
26 Applications
(continued)
26.14 Line Decoder/Encoder
The line decoder/encoder supports either single-rail or dual-rail transmission. In dual-rail mode, the line codes sup-
ported are as follows:
I
Alternate mark inversion (AMI).
I
DS1 binary 8 zero code suppression (B8ZS).
I
ITU-CEPT high-density bipolar of order 3 (HDB3).
In the single-rail mode, a line interface unit (LIU) decodes/encodes the data.
In the dual-rail mode, loss of signal in monitored.
In the case of coded mark inversion (CMI) coding (Japanese TTC standard JJ-20.11), the LIU decodes the data,
indicating both the CMI coding rule violations (CRVs) and line coding violations as bipolar violations. (In the CMI
mode, the framer is in the single-rail mode.)
26.15 Receive Frame Aligner/Transmit Frame Formatter
The receive frame aligner and transmit frame formatter support the following frame formats:
I
D4 superframe.
I
SF D4 superframe: F
T
framing only.
I
J-D4 superframe with Japanese remote alarm.
I
DDS.
I
SLC-96.
I
ESF.
I
J-ESF (J1 standard with different CRC-6 algorithm).
I
Non-align DS1 (193 bits
—
clear channel).
I
CEPT basic frame (ITU G.706).
I
CEPT CRC-4 multiframe with 100 ms timer (ITU G.706).
I
CEPT CRC-4 multiframe with 400 ms timer (automatic CRC-4/nonCRC-4 equipment interworking) (ITU G.706
Annex B).
I
Non-align E1 (256 bits
—
clear channel).
I
2.048 coded mark inversion (CMI) coded interface (TTC standards JJ-20.11).
26.16 Receive Performance Monitor
The receive framer monitors the following alarms: loss of receive clock, loss of signal, loss of frame, alarm indica-
tion signal (AIS), remote frame alarms, and remote multiframe alarms. These alarms are detected as defined by
the appropriate ANSI AT&T, ITU, and ETSI standards.
Performance monitoring as specified by AT&T, ANSI, and ITU is provided through counters monitoring bipolar vio-
lation, frame bit errors, CRC errors, errored events, errored seconds, bursty errored seconds, and severely errored
seconds.
In-band loopback activation and deactivation codes can be transmitted to the line via the payload or the facility data
link. In-band loopback activation and deactivation codes in the payload or the facility data link are detected.