Ericsson MINI-LINK TN R3 ETSI Technical Description page 29

TDM Bus
PCI Bus
SPI Bus
Power Bus
Figure 27 Block diagram for NPU3
3.3.2.1 TDM
This block interfaces the TDM bus by receiving and transmitting the traffic
(nxE1) and DCN channels (nx64 kbit/s).
The Node Processor communicates with the TDM block via the PCI block.
3.3.2.2 PCI
This block interfaces the PCI bus used for control and supervision
communication. The block communicates with the Node Processor, which
handles control and supervision of the whole NE.
3.3.2.3 SPI
This block interfaces the SPI bus used for equipment status communication.
The block communicates with the Node Processor, which handles equipment
status of the whole NE.
Failure is indicated by LED's on the front of the unit.
4/1555-CSH 109 32/1-V1 Uen B 2007-09-14
TDM
Node
PCI
Processor
SPI
Secondary
voltages
Power
User Output
Line
4xE1 + 2xUser Out
Interface
2x10/100BASE-T
Ethernet
O&M
USB
Basic Node
9704
23