4E1 PDH Multiplexer is developed based on the VLSI chips,it realizes multiplexe and optical transmission of 4 E1 circuits .It holds the function of orderwire phone and user's extension channels.
Technology Features:
Supplies 4 E1 transparent transport
Fiber line bit rate is 150Mbps
All necessary alarm functions,supervises the real-time status of remote terminal
The orderwire phone uses the ordinary telephoneAs the remote terminal device,making up of the star-network with the rack device
Supplies RS232 network management interface
Supplies one user RS232 transparent data channels
Single board design, 1U, and 19 Inch standard
AC 220 or DC-48 is optional
Interface Parameters:
Optical interface:
| NAME | OPTION | STANDARD |
| Transmit Mode | Single/ Multi-mode | Single Mode |
| Module | Single/Double Fiber | Double Fiber |
| Interface | FC/SC/ST | FC |
| Wavelength | 1310nm/1550nm | 1310nm |
| Distance | 2Km/40Km/60Km/120Km | 40Km |
E1 Interface:
Bit rate:2048Kbps±50ppm
Impedance:75Ω unbalanced(120ohm balanced optional, please declare in advance if you need balanced one)
Coding:HDB3,according to ITU-T G.703
Orderwire phone:
Ordinary 2 line phone
64Kbps PCM coding
When local terminal pick up the phone, remote terminal ring and local terminal ring back tone
Anyone terminal hang up, remote terminal shows busy
It will have howler tone when remote terminal hang up and local terminal doesnt in one minute
Working Condition :
Input voltage range : -48V,permit -36V~-72V(DC);220V,permit 165~264(AC)
Power Consumption : 5W
Environment Temperature : 0-50
Humidity:95%,uncondensation
Other Characters:
Dimension:483mm×44mm×180mm
Weight:900g