... s unframed error performance testing Detailed Product DescriptionTest E1 BER, datacom interface, alarm, loop delay, large 320*240 ... options (internal and picking-up) For Datacom:V.24/RS232/V.28, V.35, V.36, X.21, RS-449, RS-485 ... insertion: None, AIS, PatterlessDatacom Technical(1) Data interface type: V.24, V.35, V.36, X.21, RS-449, RS-485, ... Humidity: 5%~90%, non-condensing SAT-1CS E1 Datacom Tester