Alcatel-Lucent 9500 MXC, Руководство пользователя

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Chapter 3. 9500 MXC Nodes
Vol. II-3-38 Alcatel-Lucent
DAC 1x155o and DAC 2x155o
DAC 1x155o provides access for one STM1/OC3, 155 Mbps optical tributary.
DAC 2x155o is identical except it supports two 155 Mbps tribs for twice the
capacity.
Operation is transparent to SDH or SONET frame information:
• They incorporate a transparent, non-regenerative architecture; there is no
internal clock source / re-synchronization implementation. They are intended
for ADM-to-ADM linking where the ADMs provide the clock recovery and
signal re-sync options.
• DAC 1x155o and DAC 2x155o should not installed back-to-back (trib
interconnected) over more than 2 hops of 9500 MXC (not more than one
DAC-DAC repeated hop).
• However, there is no practical limit to the number of radio link hops
(RAC-to-RAC) between the DACs.
DAC 1x155o and DAC 2x 155o require an STM1/OC3 INU/INUe backplane bus
setting.
It plugs into any of the INU/INUe universal slots, and in the INUe restricted
slots.
The connectors are SC type, and cable options are available, as accessories, for
extension to SC to FC types. SC-SC attenuator cables options are also available.
The receive-level range is -31 dBm (max sensitivity) to -7 dBm (max input
power). The transmit level range is: Min -15 dBm to Max -8 dBm.
The SDH optical line code is Binary Scrambled NRZ (Non Return to Zero).
Where protection of the DAC is required (line protection), two DAC 1x155o or
DAC 2x155o plug-ins can be installed and splitter Y-cables fitted to provide an
extension to single SC Tx and Rx connectors.