User manual

Chapter 5. Loop Back Testing
45 Version 1.2 Apr 2006
5.2.3 Datacom (RS-530, V.35, X.21, RS-449, RS-232) 4-Channel Port Card Loop Back
* LLB (local loop back)
near end (NE) far end (FE)
* RLB (remote loop back)
near end (NE) far end (FE)
* V54up (V.54 remote loop back)
near end (NE) far end (FE)
* V54dn will release the remote loop back
Set the clock "Rate" on all units in any configuration to equal the actual transmission rate. Without
proper setting, the loop back functions will not operate properly.