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V Serial Interface Converter

E1 to V.24(RS232) converter synchronous

This device provides an E1 interface and a synchronous serial interface which can realize the interface conversion between E1 and synchronous serial interface and the user can use the data channel rate of 2.048Mbps. The built-in loop test function of the equipment provides convenience for project opening and daily maintenance.
◆ Integrated circuits based on independent intellectual property rights;
◆ Synchronous serial interface supports hot swapping; synchronous serial interface supports DTE and DCE modes;
◆ synchronous serial working clock can support three modes: internal clock external clock and line clock;
◆ The speed of the synchronous serial port can support 16 baud rates;
◆ Support both adaptive 120Ω / balanced and 75Ω / unbalanced impedance no need to set;
◆ The system has undergone rigorous testing and practical verification and fully complies with ITU-T V.24 / V.28 G.703 G.704 and other recommendations;
◆ Provide 3 kinds of loopback functions: E1 local self-loop (ANA) serial port self-loop (DIG) make the remote side serial port self-loop (REM);
◆ Pseudo-random code test function easy to open the line can be used as a 2M bit error meter;
◆ Optional AC 220V DC -48V DC + 24V no difference between positive and negative DC power supply.
E1 interface
Interface Standard: comply with protocol G.703;
Interface Rate: 2048Kbps±50ppm
Interface Code: HDB3;
E1 Impedance: 75Ω (unbalance) 120Ω (balance);
Unbalanced type can use coaxial interface adapter suitable for 75-2 / 3 coaxial cable
Jitter tolerance: In accord with protocol G.742 and G.823
Allowed Attenuation: 0~6dBm
Synchronous serial ports
Interface characteristics:Meet ITU-T V.24 V.28 EIA RS232 standard
Connection method: DCE/DTE
Support baud rate:115200/57600/56000/38400/33600/28800/19200/14400/12000/9600/4800/2400/1200/600/300/100 
Clock mode: G.703 recovery clock internal clock external clock
Synchronous serial port pin definition:
Synchronous serial port DB25 pin number Pin name
1 Protection GND
2 Send data A
14 Send data B
3 Receive data A
16 Receive data B
4 Request to send
5 Clear to send
6 DCE ready
20 DTE ready
8 Data carrier detected
24 Send clock A(from DTE)
11 Send clock B(from DTE)
15 Send clock A(from DCE)
12 Send clock B(from DCE)
17 Receive clock A(from DCE)
9 Receive clock B(from DCE)
Electrical and mechanical properties
System power:AC180V ~260V;DC –48V;DC +24V
Power consumption:≤5W 
Dimension: (L×W×H)  216×138×31mm Desktop
Working environment
Working temperature: -10°C ~ 50°C
Working Humidity: 5%~95 % (no condensation)
Storage temperature: -40°C ~ 80°C
Storage Humidity: 5%~95 % (no condensation)