5 
Network Tests (1-8)
Three NETWORK TESTS can be performed through this menu: PAYLOAD (PAYLD) LOOPBACK, LINE LOOPBACK and LOCAL LOOPBACK. To access NETWORK TESTS MENU from the TEST MENU, press Enter when NETWORK TESTS MENU for a particular E1 circuit (NET 1 through NET 8) appears in the display.
When in a NETWORK TEST MENU, pressing the UP or DOWN ARROWs toggle between the three options, PAYLD, LINE, and LOCAL LOOPBACK.
Payload Loopback
The PAYLOAD LOOPBACK on the DL3800E unit is used to verify the proper operation of the E1 network and the DL3800E.
To initiate a PAYLOAD LOOPBACK from the DL3800E, press Enter when PAYLD LOOPBACK appears in the display for the E1 (NET 1 through NET 8) line to be looped back.
When a PAYLOAD LOOPBACK is in operation, a plus sign will appear after the words PAYLD LOOPBACK in the display.
Payload Loopback | + |
When the loopback is terminated, the “plus sign” disappears.
To end the loopback, press Enter again while still in the PAYLD
LOOPBACK MENU.
Front Panel Interface |
