Black Box LRA1208C Guia De Inicio Rapido página 8

T1 12-PORT ACCESS MULTIPLEXOR MODULE
1. Introduction
The T1 12-Port Access Multiplexor Module (LRA1208C) is a 12-port T1 access
multiplexor module for the 2 x 12 or 1 x 4 slot DSLAM Chassis. The module
attaches to each Uplink Interface Module via a 10/100-Mbps Ethernet connection
on the backplane. Each T1 port translates the outgoing Ethernet frame to T1 via
media conversion. This is a Layer 1 copper pair to an LRA1200A-T. Received WAN
frames are converted back to Ethernet and forwarded to the appropriate
backplane port. No routing or translational bridging is done internally.
The connection across the T1 line may be a fractional or full T1. Speed is
hardware- or software-selectable per port (software overrides hardware settings)
and determined by the Module. T1 technology is intended for use from the
telephone company central office across the local loop to the home or business. It
may also be used to transport data between locations over T1 lines.
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