DDFDigital Distribution Frame:
1,To use siemens series of radio frequency coaxial
connector of 75oum,
2,Meet the IEC standar

DDFDigital Distribution Frame:

Description

Adopting “general frame + connector units of different pattern “, the digital distribution products including75Ω,120Ω,75Ω/120Ω which are compatible with SINMENS, NEC,AT&T and FUJITSU styles. It’s widely used between digital multiplexing equipment or between digital multiplexing equipment and exchangers, providing function of distribution, transition, test. 
Features
1.     Compact structure can enlarge capacity and operation space  
2.      General Frame, convenience for remove, installation, combination and extension capacity
3.      Modular design and suitable for different pattern units
4.      Standard unit, flexible for transfer and extension 
5.      Reliable grounding protection
6.      Easy to self-loop and on line test
7.      Clear line identification, convenience for maintenance and management
8.       All the idexes meet the IECstandards. 

Electrical properties:

(1) Impedance: 75Ω/120Ω

(2) Working speed: 2Mbit / s, 8Mbit / s, 155Mbit / s and so on.

(3) Return loss: ≥ 18dB (50kHz ~ 233MHz)

(4) insertion loss: ≤ 0.3dB (50kHz ~ 233MHz)

(5) Insulation resistance: ≥ 1000MΩ

(6) Contact resistance: ≤ 2.5mΩ (outer conductors) ≤ 10mΩ (between the inner conductor)

(7) anti-voltage strength: ≥ 1000VC (50Hz) / min

(8) crosstalk between the defensive back line degree: ≥ 70dB (50kHz ~ 233MHz)

(9) Pull strength: ≥ 50N

 Speciification:

SIZE:2600*520*300(mm)   Capacity:  120 units

         2200*520*300(mm)   Capacity:  100 units

         2000*520*300(mm)   Capacity:  90 units

  Size:2600*360*300(mm)    Capacity :72 units

          2200*360*300(mm)    Capacity :60 units

          2000*360*300(mm)    Capacity :54 units

size: 2600*240*260(mm)      Capacity:48 units

          2200*240*260(mm)      Capacity:40 units

          2000*240*260(mm)      Capacity:36 units