tmxf28155 ETC-unknow, tmxf28155 Datasheet - Page 361

• 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
17 TMUX Functional Description
17.1 TMUX Introduction
The TMUX multiplexer block implements SDH/SONET-compliant, byte-interleave multiplexing/demultiplexing, over-
head insertion and termination, multiplex section protection (MSP) 1 + 1 switch capability, and serializer/deserial-
izer for 155.52 Mbits/s and 51.84 Mbits/s traffic.
As shown in
STS-1 mode. In STS-3 mode, the TMUX implements the functions necessary to multiplex and demultiplex up to
three STS-1 signals to/from a SONET STS-3 signal. In STM-1 (VC-4) mode, the TMUX provides the functionality to
multiplex and demultiplex up to three TUG-3 signals to/from an STM-1(VC-4) signal. The device can also build/
extract up to three AU-3 signals to/from an STM-1(VC-3) stream. In STS-1 mode, the TMUX implements the func-
tions necessary to interface a single STS-1 to/from an external serial link.
On the high-speed side or line side, the block can be configured for either a 155.52 Mbits/s (STS-3/STM-1) or
51.84 Mbits/s (STS-1) serial data interface. On the low-speed side or tributary side, the TMUX provides a byte-wide
bus that can communicate with up to three STS-1/TUG-3/AU-3 devices at a 19.44 MHz rate. If single STS-1 mode
is employed, the bus rate will be 6.48 MHz. The TMUX therefore provides complete multiplexing/demultiplexing
to/from an STS-3/STM-1 signal for up to 84 DS1, 84 JT1, or 63 E1 signals. In STS-1 mode, the TMUX provides
multiplexing/demultiplexing for up to 28 DS1, 28 JT1, or 21 E1 streams. In STS-3/STM-1 mode, the TMUX from
only one device is required. The TMUX in other connected devices may be powered down to reduce consumed
power. This architecture allows flexible and modular growth in equipment capacity for both 51.84 Mbits/s and
155.52 Mbits/s links.
17.2 TMUX Features
Agere Systems Inc.
Multiplexes three STS-1 signals into a SONET STS-3 signal.
Multiplexes three VC-3 signals into an SDH STM-1 (AU-4) signal via a TUG-3 construction.
Multiplexes three VC-3 signals into an SDH STM-1 (AU-3) signal.
Demultiplexes three STS-1 signals from a SONET STS-3 signal.
Demultiplexes three VC-3 signals from an SDH STM-1 (AU-4) signal via a TUG-3 deconstruction.
Demultiplexes three VC-3 signals from an SDH STM-1 (AU-3) signal.
Provides STS-1-only mode for receive and transmit directions.
Provides complete functionality for SDH MSP 1 + 1 protection switching.
Detects STS-3/STM-1 loss-of-signal (LOS) conditions.
Detects STS-3/STM-1 out-of-frame and loss-of-frame (OOF/LOF) conditions.
Provides an 8-bit parallel bus interface that can accommodate up to three STS-1/AU-3s.
Provides STS-3/STM-1/STS-1 selectable scrambler/descrambler functions and B1/B2/B3 generation/detection.
Provides STS-3/STM-1/STS-1 pointer interpretation. Detects AIS-P and LOP.
Complies with GR-253-CORE, T1.105, G.707, G.783, G.806, G.821, and ETSI 417-1-1.
Figure 23 on page
365, the TMUX provides three modes of operation: STS-3 mode, STM-1 mode, and
(continued)
155/51 Mbits/s SONET/SDH x28/x21 DS1/E1
TMXF28155/51 Super Mapper
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