RuggedCom RuggedRouter RX1100 - Manual (Page 77)

7. Configuring Frame Relay/PPP And T1/E1
Revision 1.14.3 77 RX1000/RX1100™
Figure 7.11. T1/E1 Loopback Menu
The loopback test provides a means to test the digital and analog hardware of your T1/E1 hardware
and the T1/E1 line. The sender transmits a number of frames which are looped back to it. The returning
frames are verified for correctness.
A digital loopback is started first, verifying the digital section of the interface. If a loopback stub is
inserted in the interface jack, a remote loopback will verify the interfaces digital and analog sections.
If the remote equipment is able to loop, the entire T1/E1 line can be verified. If the remote router is
another RuggedCom router, a starting a line loopback will verify both cards and the line. This router
will display the count of loopback frames as they arrive.
Figure 7.12. T1/E1 Loopback
The Select Loopback Type field selects the loopback.
The Number of Loops field controls the frames sent during digital and remote loopback. This
parameter is not used during line loopback.
The Time to run test field limits the time the sender will transmit and the router running line loopback
will wait.
Running a loop test on an active interface will immediately cause it to go down. The loop test
automatically initializes the trunk after completing the test.