3Com MSR 50 Series Configuration Manual page 1939

SSH Server Configuration Example 1939
Select Connection/SSH/Auth. The following window appears. Click Browse... to
bring up the file selection window, navigate to the private key file and click OK.
Figure 568 SSH client configuration interface (2)
From the window shown in Figure 569, click Open. The following SSH client
interface appears. If the connection is normal, you will be prompted to enter the
username (client002) to enter the configuration interface, as shown in Figure 570.