Ericsson MINI-LINK TN R3 ETSI - Page 40

MINI-LINK TN R3 ETSI
7489
SPI
TDM
TDM Bus
PCI Bus
SPI Bus
Power
Power Bus
Secondary
voltages
Control and
Supervision
Inverse
Multiplexers
Ethernet
10/100/1000BASE-T
10/100BASE-T
10/100BASE-T
10/100BASE-T
10/100BASE-T
10/100BASE-T
nxE1
nxE1
nxE1
nxE1
nxE1
nxE1
Figure 36 Block diagram for ETU2
3.6.3.1.1 TDM
This block interfaces the TDM bus by receiving and transmitting the E1s used
to carry Ethernet traffic.
3.6.3.1.2 Inverse Multiplexers
Each inverse multiplexer converts one Ethernet connection into nxE1, where
n16, transmitted to and received from the TDM block.
3.6.3.1.3 Ethernet
This block provides the unit’s external Ethernet interfaces. Each interface is
linked to one inverse multiplexer.
The Ethernet Traffic function offers 8 priority queues in both directions to/from
the Ethernet ports. The mapping follows IEEE 802.1D 2004 strict priority
queuing and can be configured, per node, to use 1–8 of the queues. Which
queue to use for untagged packets can be configured per port and direction.
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/1555-CSH 109 32/1-V1 Uen B 2007-09-14