E1 Channel Protection Switching Device

Overview

This series of equipment is the E1 switch developed on the basis of the special VLSI developed by our company. Provide 1-8 independent E1 switching protection functions (8 + 16e1). Under the default working mode, when the main E1 line fails, the equipment will automatically switch to the standby E1 line for transmission without damage; After the main E1 line is repaired, the equipment will automatically switch back to the main E1 line for transmission without damage, and it will work automatically without manual monitoring and operation; It is applied to the protection of teleconference, video conference and video monitoring system.

Features

• integrated circuits based on independent intellectual property rights;
• the equipment is equipped with a relay, and the equipment is powered off, supporting the direct connection function between the service and the main E1;
• when Los, AIS, lof and crc4 alarms occur on the E1 line currently being transmitted, the system switches to another E1 line without damage;
• when the E1 line is in PCM framing mode, it can be switched according to crc4 error code;
• when the main E1 line works, the standby E1 line does not send HDB3 code;
• the equipment can be equipped with console network management. The network management can view the operating LOS, lof, AIS and crc4 status of each E1, set whether the current E1 is in automatic switching mode or manual switching mode, and set the option of sending HDB3 code from the standby E1;
• the equipment can be equipped with independent SNMP network management. The functions of the console network management can be realized on the SNMP network management. The standard SNMP network management protocol fully supports the MIB library;, The number of devices that can be monitored only depends on the number of IP resources; Support IE browser to upgrade the system program; Graphical interface, consistent with the actual equipment indication status; Support cross gateway communication, and the network management host can manage multiple branch office equipment; Display comprehensive historical alarm and current alarm;
• a variety of power supply modes are available: AC220V, dc-48v / DC24V, etc., supporting dual power supply backup function;
• dc-48v / DC24V power supply has the function of automatic polarity detection, and it is not necessary to distinguish the positive and negative poles during installation

Parameters

• E1 Interface:

Equipment interface：  The equipment interface complies with the recommendation of G.703

Speed：   2048Kb/s±50ppm

Code pattern：   HDB3

Impedance：   Unbalanced type 75 Ω (unbalanced type is equipped with coaxial interface adapter, which can adapt to 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:

working temperature：-10℃—+60℃

Storage temperature:：-40℃—+85℃

Working humidity：0%—95%（No condensation）

MTBF：＞100,000hour

Specifications