Data Sheet
June 2002
TMXF28155 Supermapper
155/51 Mbits/s SONET/SDH x28/x21 DS1/E1
1 Features
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Versatile IC supports 155/51 Mbits/s SONET/SDH
interface solutions for T3, DS2, T1/E1/J1, and DS0/
E0/J0 applications.
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Implementation supports both linear (1 + 1, unpro-
tected) and ring (UPSR) network topologies.
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Provides full termination of up to 21 E1, 28 T1, or
28 J1.
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Low-power 3.3 V supply.
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–40
°
C to +85
°
C industrial temperature range.
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456-pin ball grid array (PBGA) package, 35 mm
2
with
a 1.27 mm ball pitch.
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Complies with
Telcordia
, ITU,
ANSI
, ETSI, and
Japanese TTC standards: GR-253-CORE, GR-499,
(ATT) TR-62411, ITU-T G.707, G.704, G.706, G.783,
G.962, G.964, G.965, Q.542, T1.105, JT-G704,
JT-G706, JT-G707, JT-I431-a, ETS 300 417-1-1,
ETS 300 011, T1.107, T1.404.
1.1 SONET/SDH Interface
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Termination of a single 155 Mbits/s STS-3/STM-1 or
single 51 Mbits/s STS-1/STM-0.
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Built-in clock and data recovery circuit at
155 Mbits/s STS-3/STM-1 interface (can be dese-
lected if external clock recovery is provided).
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Supports overhead processing for all transport and
path overhead bytes.
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Optional insertion and extraction of overhead bytes
via a serial transport overhead access channel. Con-
figurable as dedicated DCC channels.
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Software-controlled linear 1 + 1 protection via dedi-
cated interface to protection card.
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Full path termination and SPE extraction/insertion.
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SONET/SDH compliant condition and alarm report-
ing.
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Built-in diagnostic loopback modes.
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8 kHz line frame sync output.
1.2 STS/STM Pointer Interpreter
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Interprets STS/AU/TU-3 pointers.
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Synchronizes 8 kHz frame and 2 kHz superframe to
system/shelf timing reference by setting the transmit
STS-3/STM-1 pointers to a fixed value of 522.
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Monitors/terminates SPE path overhead.
1.3 Telecom Bus Interface
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Telecom bus interface to mate devices including
clock, data[8], parity, SPE-, J0-, J1-, and V1 timing
indicator.
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Line and path RDI and REI signals passed to mate
devices.
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Three Supermapper devices, two configured as mate
devices, provide full termination of an
STS-3/STM-1. A three-chip solution to terminate
84 DS1s/J1s or 63 E1s.
1.4 VT Termination/Generation (x28/x21)
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Monitors/terminates VT path overhead for
28 VT1.5/TU-11 or 21 VT2/TU-12.
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Synchronizes VT/TU SPE to system/shelf timing ref-
erence by setting the transmit VT/TU pointers to
fixed values for asynchronous mapping or by dynam-
ically changing the transmit VT/TU pointers for byte
synchronous mapping.
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Fixed pointer generation in transmit side for asyn-
chronous mapping.
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Dynamic pointer generation in transmit side for byte-
synchronous mapping.
1.5 Mapping/Multiplexing Modes (x28/x21)
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Maps DS3 clear channel or framed signal into STS-1
or TUG-3.
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Maps T1/E1/J1 into VT/TU (including DS1 into
TU-12).
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Supports asynchronous, byte-synchronous, and bit-
synchronous mapping.