ARC DSP 9612 Uživatelská příručka stáhnout pdf (Strana 26)

Loopback Control Switch

Page

Loopback Control Switch

The front panel of the modem has a push button for initiating the

following loopback diagnostic tests:

Local analog loopback



started by pressing the button one time.

Local digital loopback



started by pressing the button two times.

Remote digital loopback



set the local modem’s RTS signal to

low. Then press the remote modem’s diagnostics button three

times and raise the local modem’s RTS signal to start the test. The

ALB

and

DLB

LEDs go ON when the modem is in remote digital

loopback. This test is only available in Fast Poll mode only.

Figure 2-4 illustrates these three diagnostics.

Figure 2-4. Loopback Diagnostics

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ARC DSP 9612 Uživatelská příručka Strana 26