l         the carefully designed electric circuit and entire hardware scheme can guarantee the reliability of this equipment, which basically does not adopt the special-purpose chip, and its production is not influenced by purchasing;

l         the system has passed through strict test and practical confirmation, conforming to ITU-T V.35, G.703, and G.704 standard;

l         E1 interface may choose 75Ω unbalanced or 120Ω balanced;

l         V.35 supports hot pl ing;

l         V.35 interface has many kinds of clock source and timing for option; 

l         provides four clock types: E1master V.35 external, E1master V.35 internal, E1submissive V.35 external, E1 submissive V.35 internal;

l         V.35 interface can be tail-connected with other DCE equipment;

l         provides 3 kinds of loop-return function, namely E1 self-looping at local end, V.35 self-looping at local end, and V.35 being ordered to self-loop at remote end (non- framing model not having this function);

l         AC220V and DC-48V power supply pattern may select, DC-48 and +24V power are not divided to positive and negative pole for simple installation and maintenance;

l         has the function of pseudo-random code testing, which brings great convenience for installation, deb ing and maintenance of equipment;

l         working clock can support internal-clock, external-clock, and route clock;

l         network management interface uses SNMP(should with chassis can realize this function).

 Technical data

Interface standard: Conforms to G.703 standard

Interface rate: 2.048Mbit/S±50ppm

Vibration characteristic: Satisfies G.742 and G.823 standard

Transmission capacity: 1*E1

Clock type: internal-clock, route clock

Connecter: BNC (75 Ω), RJ45 (120 Ω)

Interface impedance: 75Ω (non- balanced), 120Ω (balanced)

V.35 interface:
Interface Rate： 64Kbps±50ppm
Interface character： match ITU-T V.35

Connector： DB25-M34(male/female optional)

Input voltage: AC220V; AC 110V; DC－48V; DC+24V

Power consumption: ≤5W

Operating temperature: 0°C ~ 50°C

Storing temperature: －40°C ~ +70°C

Relative humidity: 95 %