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-1560 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. It supports G.703, V.24/RS232, V.35, V.36/RS449, X.21, EIA－530/530A interfaces. It also supports RJ45 network interface, complete TCP/IP, and updating online. Its characteristic remote monitoring function makes it ideal for users to easily perform real-time monitoring to the test unit through certain software under Windows Chinese environment.
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
Circuit opening—64K offline loopback testing
Circuit—64K offline end-to-end testing
Network maintenance—V series interfaces testing
Circuit opening--T1offline end-to-end testing
Circuit--T1 offline loopback testing
Signal quality testing—E1/T1 pulse template
Test occupied channel—Voice Monitoring
Test equipment A/D transfer ability—Audio Testing
Verify Ethernet Connectivity—Ping testing
E1 interface 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
l Pulse mask: Test if the E1 waveform satisfy G.703 standard
V Series Interfaces Testing
?l Defects and abnormal：Out of service or in-service testing，error characteristics testing
64K Interface Testing
l Defects and abnormal: Out of service or in-service testing, error characteristics testing
RJ45 Interfaces Testing
l PING: Test network connectivity
T1 Interfaces Testing
l Defects and abnormal: Out of service or in-service testing, error characteristics testing
l Pulse mask: Test if the E1 waveform satisfy G.703 standard
