3Com S330 manual OC3/STM-1 Loopback Menu

180CHAPTER 5: PATHBUILDER S330 DIAGNOSTICS AND PERFORMANCE STATISTICS

Figure 137 OC3/STM-1 Loopback Menu

4Select [1] Set Loopback. A prompt listing the loopback choices for the selected port appears at the bottom of the screen.

5Enter 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.

T1/E1 UNI Loopbacks 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

T1/E1 Interface

Network Side

Network Card

Local

Line

Payload