This device is an E1 switch developed on the basis of special VLSI. Two independent E1 switching protection functions are provided. Under the default working mode, when the main E1 line fails, the device will automatically switch to the standby E1 line for transmission without damage; After the main E1 line is repaired in good condition, the device will automatically switch back to the main E1 line for transmission without damage, and work fully automatically without manual monitoring and operation; It is applied to the protection of teleconference, video conference and video monitoring system.

● Integrated circuits based on independent intellectual property rights;

● Built in relay, when device power off, support transmission on mainE1line;

● When LOS, AIS, LOF and CRC4 alarms occur on the current transmitting E1 line, the system will switch to another E1 line without damage;

● When the E1 line is in the PCM framing mode, it can be switched according to the CRC4 error; 

● You can choose to configure the standby E1 line not to send HDB3 code when the main E1 lineworks;

● Avariety of power supply options: AC220V, DC-48V/DC24V, etc;

● DC-48V/DC24V power supply with automatic polarity detection, no need to distinguish positive and negative when installing.

● E1 Interface

All 16 E1 interfaces of the equipment comply with the recommendation of G.703

Speed: 2048kb / s ± 50ppm

Code type: HDB3

Impedance: unbalanced 75W / balanced 120

Unbalanced coaxial interface adapter for 75-2 / 3 coaxial cable

Jitter characteristics: meet the recommendations of g.742 and g.823

Allowable attenuation of input port: 0 ~ 6dbm

● Environmental Indicators

Operating temperature: – 10 ℃ – + 50 ℃

Storage temperature: – 40 ℃ – + 85 ℃

Working humidity: 0% – 95% (no condensation)

MTBF: ＞ 100000 hours