Alcatel-Lucent 9500 MPR - Figure 79. Available Loopbacks

User Manual
Product information and planning
9500 MPR Rel. 3.1
3DB18809AAAA Issue 1 167/980
2.8.11.8 Loopbacks with ODU300
To facilitate the installation/commissioning and the remote maintenance one loopback is available.
As the activation of a loopback affects the traffic, the presence of a loopback is indicated to the
management systems as an abnormal condition.
The loopback is "loop and cut" type (the signal sent after the loopback execution is the same signal sent
back).
The loopback supported by the Radio board is shown in the following figure.
Figure 79. Available loopbacks
1) IF Radio loopback: is implemented in the analog IF part of the ODU300 Radio Module, the traffic
received from switch side is redirected toward the switch itself; this loopback can be activated
only on the aggregate traffic. When this loop is enabled the behaviour is the following:
– TDM2TDM flows: before transmitting the packets towards the switch, the FPGA looking
the VLAN will rebuild the right Ethernet header.
– TDM2ETH flows: before transmitting the packets towards the switch, the FPGA looking
the VLAN will rebuild the right Ethernet header.
– The Ethernet flows are dropped.
PDH board
RADIO board
CORE
SWITCH
NxE1
LIU
FPGA
SerDes
FPGA
MODEM
1
FPGA