Waters Network Systems GSM2108 Operating Manual page 98

Function name:
Loopback Test
Function description:
In the Loopback Test function, there are two loopback tests -- Internal Loopback Test and External
Loopback Test. The former test function will not send the test signal outside the switch box. The test
signal only wraps around in the switch. The second function will send the test signal to its link partner.
If the switch is not connected to active network devices, i.e. the ports are link down, the switch will
report the port numbers failed. If they all are okay, OK is displayed.
Note: When you choose either of these tests, there will be interference with the normal system.
Packets that are being sent and received will stop temporarily.
Function name:
Ping Test
Function description:
Waters Network Systems
Figure 5.68 - Diagnostics
Figure 5.69 – Loopback Test
User's Manual
GSM-2108/GSM-1008SFP
Page 98