Issue Description
The router (AR46-20) is connected by one 1E1-F FIC-card to a radio link by 120ohm E1, so you should use the cable for the 120ohms E1 from the router to the radio, after the whole connection you check the connectivity by ping, as a result some ping packets are lost, but the physical link is fine..........
Handling Process
You should modify the dip switch on the 1E1-F FIC-card in order to works with the 120ohm E1......
Suggestions
Please check the attach file in other to modify the dip switch.....