Chapter 3. 9500 MXC Nodes
Vol. II-3-40 Alcatel-Lucent
DAC 155oM
The DAC155oM functions as a terminal multiplexer; it terminates or originates
the SDH/SONET frame and supports interoperability with other SDH or SONET
multiplexers in the market.
• DAC 155oM multiplexes one STM1/OC3, 155 Mbps optical tributary to/from
a 9500 MXC backplane configured for NxE1 or NxDS1.
• Options are provided for VC3 or VC4 mapping of lower-order traffic streams
to/from STM1. SONET mapping is fixed.
• SDH with VC3 framing: Three VC3s are mapped into an STM1 signal, each
containing up to 21xVC12 or 28xVC11. In turn each VC12 contains 1xE1,
and each VC11 1xDS1.
• SDH with VC4 framing: VC4 directly maps up to 63xVC12 or 84xDS1 into
an STM1 signal. In turn each VC12 contains 1xE1, and each VC11 1xDS1.
• SONET with STS1 framing: Three STS1s are mapped into a SONET signal,
each containing 28xVT1, or 21xVT2. In turn each VT1 contains 1xDS1, and
each VT2 1xE1.
• Mapping options are provided for bit asynchronous or transparent virtual
tributary (TVT) modes. Bit asynchronous is selected on all circuits except those
carrying Ethernet data, where TVT mode is required.
• Clocking options are provided for recovered-clock and internal.
• 9500 MXC NMS may be transported within the MSOH or RSOH, access to
which is provided within the NMS bytes on the INU backplane.
Applications include:
• Ring closure on a 9500 MXC Super-PDH ring using optical cable.
• Interconnection of a 9500 MXC Super-PDH network with an SDH core
network.
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