Fam Loopbacks - 3Com 3C63100-AC-C - PathBuilder S600 Bridge/router Reference Manual

Figure 153 illustrates the CBR DSX loopback options.
Figure 153 CBR DSX Loopback Options

FAM Loopbacks

The FAM module supports the following loopbacks:
Local Card—Loops the transmit FAM output on the receive side. All cells coming
from the FAM port card are looped through the backplane and back to the FAM
port card. The transmitted data will continue to go on the output towards the
trunk card.
Network Line—Loops the DS1 received data back on the output side after the
digital data has been recovered.
Network Card—Loops the DS1 received payload back toward the line output.
Figure 154 illustrates the FAM loopback options.
Figure 154 FAM Loopback Options
CBR DSX Interface
Line Side
Network Line
Network Card
FAM Interface
Line Side
Network Line
Network Card
Using Loopbacks
ATM Side
(Trunk)
Local Card
ATM Side
(Trunk)
Local Card
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