T1/E1 Uni Loopbacks - 3Com SuperStack II PathBuilder S330 Reference Manual

180 C 5: P B
HAPTER ATH UILDER

T1/E1 UNI Loopbacks

S330 D P
IAGNOSTICS AND ERFORMANCE
Figure 137 OC3/STM-1 Loopback Menu
4 Select [1] Set Loopback. A prompt listing the loopback choices for the selected
port appears at the bottom of the screen.
5 Enter the number corresponding to the type of loopback you want to configure.
The following subsections describe the available loopbacks for each of the
PathBuilder S330 interfaces.
The following loopbacks are available for the T1/E1 UNI interface:
Network Line—Loops the T1/E1 received data back on the output side after the
digital data has been recovered.
Local Card—Loops the transmit T1/E1 output on the receive side; the transmitted
data will continue to go on the output.
Network Card—Loops the T1/E1 received payload back toward the line output.
illustrates the loopbacks for T1/E1.
Figure 138 T1/E1 Loopbacks
Network Side
Line
S
TATISTICS
T1/E1 Interface
Network Card
Local
Payload