While opening 2M circuit，there is a need to judge if the errors and alert index are complied with opening conditions; while dealing with the fault location，there is a need to judge if there is any problem existing in line equipment.
BER-1530 Data Transmission Analyzer developed by DADI Telecom is small and easy to carry，and it can be used for BER testing from 50b/s to 2048kb/s as well as monitoring 2M circuit，which is the necessary tool for daily network equipment installation, troubleshooting and maintenance.
2M Circuit Opening- Off-line loopback testing
2M Circuit Opening—offline end-to-end testing
Network maintenance—2M online testing
Network maintenance—2M pass through test
Test occupied channel—Voice Monitoring
Test equipment A/D transfer ability—Audio Testing
Network maintenance—V series interfaces testing
G.703 E1 Out of service / in-service Testing
?l Defects and abnormal: Out of service or in-service testing, error characteristics testing
?l Loop delay: Precision reaches 1us
?l Switch time: The time of switching from the main channel to standby channel
?l Audio testing: Test if there is problem, such as distortion, etc. Existing in PCM or SPC while stimulating the conversion between voice signal and digital signal
?l Voice monitoring: Scan channel to confirm the busy of 64Kchannel，monitoring line which is being used
V Series Interfaces Testing
?l Defects and abnormal: Out of service testing, error characteristics testing
