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.
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.
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.
DL3800E Inverse Multiplexer User’s Guide — July 9, 2001 |
