User Manual

UBS Macro B T S Product Ov erview Chapter 1: Ov erview
SSI (Site Span I/O) module
The S SI provides the interfaces between the UBS Macro BTS frame and the following external
interfaces:
• IP -backhaul spans
The S SI directly supports up to 8 spans of packet backhaul through either balanced T1 or
E1 span lines. S SI can also be equipped with an optional unbalanced E1 daughter card that
transforms the S SI balanced E1 span line connections to 75 -ohm coaxial cable connections.
• IP -backhaul via Ethernet/OTI (Open Transport Interface)
• E -GPS module or RGPS head connects to the S SI RGPS connector . This connector may
also be used for the Sync Sharing Input connection from the SYNC SHARING connector of
another UBS Macro BTS frame S SI.
• Sync Sharing Output is present at the S SI SYNC SHARING connector . This connector
may be used for connection to the RGPS connector of another UBS Macro BTS frame
S SI. Chaining the SYNC SHARING connector of one UBS Macro BTS frame to the RGPS
connector of another UBS Macro BTS frame and so on provides sharing the GPS sync
signal between BTSs.
• Customer inputs/outputs; up to 24 customer defined inputs and up to 8 customer defined
outputs
• LMT (Local Maintenance T erminal); like the LMF (Local Maintenance F acility)
The S SI provides interfaces for the following UBS Macro BTS frame equipment:
• S SI DC power input – connects to the (PDU) P ower Distribution Unit.
• S SI -to -DMI interface – connects the S SI to up to two DMIs.
• HSO interface (on rear of S SI) – connects to the optional QHSO module.
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FOA SEP 2007