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DCN OVER PDH/SDH
If there is no Ethernet/IP DCN network available to any station in the iPasolink cluster, it is possible use PDH
network for DCN ("Ethernet over PDH"). At least one E1 should be dedicated to the NMS traffic per
iPasolink cluster. RAD Egate with remote RICi units has been used successfully for this purpose. Egate has
an Ethernet interface to the NMS DCN and an STM-1 interface to the SDH/PDH network. One E1 carries the
NMS traffic through the network to the remote cluster where an RICi unit is used to convert the E1 back to
an Ethernet port connected to the root iPasolink NMS port.
MANAGEMENT USING METRO ETHERNET VPLS SERVICE
One possible solution to connect the DCN to iPasolink is to use the Metro Ethernet to carry the DCN as a
VPLS service. This solution will keep the DCN network separated from the Metro customer traffic.
Figure 53. Management connection using VPLS over Metro network
The advantage of using VPLS (as opposed to point to point VPN) is that a single Metro port at site X may
serve many tens of microwave sites (site A, B,.. etc).
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