Ericsson MINI-LINK TN R4 ETSI - Page 40

Technical Description
The Ethernet bridge connections have auto-negotiation 10/100 Mbit/s speed
and full/half duplex. Transparency to all kinds of traffic is supported, including
IEEE 802.1Q VLAN, MAC address based VLAN, VLAN tag ID based and
untagged frames, frames with up to 2 VLAN tags or frames with ICS tag.
The number of E1s in each connection is configured from the management
system. The traffic is distributed over the E1s by an inverse multiplexer. The
load sharing is seamless and independent of the Ethernet layer.
3.7.1.2 Ethernet over SDH
The Ethernet traffic is transported between NEs in one or multiple STM-1
frames, over a single hop or through a network. Figure 32 on page 36 shows
an example of how the different units can be used in a network.
10053
Core
network
1xSTM-1
1 - 4xSTM-1
100BASE-T
AMM 20p B
AMM 6p C/D
NPU3 B
SXU3 B
AMM 2p B
NPU3 B
SXU3 B
AMM 2p B
NPU3 B
SXU3 B
AMM 6p C/D
NPU3 B
SXU3 B
OMS
846/
860/
870
Figure 32 Ethernet traffic over SDH in a MINI-LINK TN R4 network
The bandwidth of each Ethernet bridge connection is nxSTM-1 where n≤4 for
SXU3 B. The ethernet traffic is switched from the NPU3 B over the high speed
bus to the SXU3 B. The SXU3 B maps the ethernet traffic to and from STM-1
frames.
Ethernet traffic is connected to the units using RJ-45 connectors with support
for shielded cable.
The Ethernet bridge connections have auto-negotiation 10/100/1000 Mbit/s
speed and full/half duplex. All kinds of traffic is supported, including IEEE
802.1Q VLAN, MAC address based VLAN, VLAN tag ID based and untagged
frames, frames with up to 2 VLAN tags or frames with ICS tag.
The number of STM-1s in each connection is configured from the management
system.
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