Basic Node
The following is a summary of the AAU functions:
• Capacity of 96xE1. 24xE1 is the default capacity and additional groups of
24xE1 are available as optional features.
• 16 ATM interfaces, IMA groups or G.804
• Up to 16xE1 in one IMA group
• Cross-connection capability of 622 Mbit/s, handling 1500 Virtual Channel
Connections (VCC) and 100 Virtual Path Connections (VPC).
• Service Categories support; CBR, rt-VBR, nrt-VBR.1,2,3, UBR and
UBR+MDCR
• Policing
• Shaping
• F4/F5 OAM support for Fault Management
3.8.2.1 Functional Blocks
This section describes the internal and external functions of the AAU, based on
the block diagram in Figure 39 on page 45.
8491
SPI
TDM
TDM Bus
PCI Bus
SPI Bus
Power
Power Bus
Secondary
voltages
IMA
Control and
Supervision
ATM
Cross-connect
Utopia
Interface
Figure 39 Block diagram for AAU
45
12/221 02-CSH 109 32/1-V1 Uen A 2008-03-14
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