Quick Eagle Networks DL3800E - Manual (Page 104)

5-16 DL3800E Inverse Multiplexer User’s Guide — July 9, 2001
5
Line Loopback
The Lineloopback is used to verify the operation of the E1 network
connection (E1 through E8). The line loopback loops the data received from
the E1 network back towards the network. The data is regenerated prior to
being looped back, however, no additional processing of the data is
performed by the DL3800E. This minimizes the impact of the DL3800E unit
during this test so that the problems can be isolated.
To initiate a LINE LOOPBACK from the DL3800E, press Enter when LINE
LOOPBACK appears in the display.
When a LINE LOOPBACK is in operation, a “plus sign” will appear after
the words LINE LOOPBACK in the display as shown below:
Line Loopback +
To end the loopback, press Enter again while still in the LINE
LOOPBACK
MENU. When the loopback is terminated, the plus sign
disappears.
Local Loopback
The local loopback is used to verify the operation of the DTE and
connections. The local loopback loops the data received from the DTE back
towards the DTE at the network interface.
To initiate a LOCAL LOOPBACK from the DL3800E, press Enter when
LOCAL LOOPBACK appears in the display.
When a LOCAL LOOPBACK is in operation, a “plus sign” will appear
after the words LOCAL LOOPBACK in the display as shown below:
Local Loopback +
To end the loopback, press Enter again while still in the LOCAL
LOOPBACK MENU. When the loopback is terminated, the “plus sign”
disappears.
You can cancel a test or loopback from any place in the menu by pressing
the UP ARROW and DOWN ARROW at the same time. However, this will
cancel all tests and loopbacks currently in progress.
NOTE: PAYLOAD and LINE LOOPBACKs will result in removal of the
looped port from service, unless the port is configured for “Install/Test
Only” mode.