224
C
6: P
B
S700 D
P
M
HAPTER
ATH
UILDER
IAGNOSTICS AND
ERFORMANCE
ONITORING
DSX-1 CBR Module
The DSX-1 CBR module supports the following loopbacks:
Loopbacks
Local Card—Loops the transmit DSX-1 output on the receive side. All cells coming
from the DSX-1 CBR port card are looped through the backplane and back to the
DSX-1 CBR port card. The transmitted data will continue to go on the output
towards the trunk card.
Network Line—Loops the DSX-1 received data back on the output side after the
digital data has been recovered.
Network Card—Loops the DSX-1 received payload back toward the line output.
Figure 171 illustrates the DSX-1 CBR loopback options.
Figure 171 DSX-1 CBR Loopback Options
CBR DSX Interface
Line Side
ATM Side
(Trunk)
Network Line
Network Card
Local Card
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.