MINI-LINKEandEMicro
3.6 A ccess Modu le
The access module is the indoor par t of a terminal. It comprises the following
types of indoor equipment:
• Access Module Magazine (AMM ), which holds the indoor plug-in units. The
AMM also provides mechanical housing and electrical interconnections
between indoor units through its backplane.
• Modem Unit (MMU) providing traffic interfaces, signal processing and the
interface with the radio unit (RAU).
• Switch Multiplexer Unit (SMU) providing additional 2 Mbit/s traffic interfaces,
2/8 and 8/34 Mbit/s multiplexers, switches and control functions for 1+1
protected systems and interfaces with the MMU.
• Service Access Unit (SAU) providing parallel input/output ports, external
alar m channel interfaces and service channel interfaces.
• Ether net Interface Unit (ETU), which enables transmission of Ethernet
traffic.
All external interfaces are located at the unit fronts.
3530
Figure 32 I ndoor units in an AMM 4U
40
AE/LZT 110 2012 R8C 2002-03-04
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