Digital Distribution Frame

WE ARE MANUFACTURE DDF MODULE 120OHMS AND 75OHMS. WE ARE HAVE DDF RACK AND PANEL ALSO HAVE 19" RACK TYPE. WE HAVE IT IN DDF 16E1 & DDF 32E1. Our DDF consists of a slim line rack/frame with hangover type DDF modules/blocks. DDF comes in two types of versions 120 OHM & 75 OHM. The module is of PCB type on which this DDF is mounted. It provides the facility of isolating the cable side and equipment side by 4 pin/socket arrangement. PCB consists of plug and jack assembly for isolating the input and output side of the digital stream. Connection can also be made by U-link that provides facility for on line testing of tributaries by suitable jumpers/patch chords.

The 2Mb module (120W) is a PCB based connecting pannel. The PCB used have 16 pin

header or wire wrapping Tag blocks namely TB1 - TB8. The incoming circuit thru 10 pairs/

16pairs HF screen cable of suitable type, are terminated on TB1, TB3, TB5, TB7. The outgoing

circuits are taken thru TB2, TB4, TB6, TB8.

There is a Plug and Jack arrangement between TB1-TB2, TB3-TB4, TB5-TB6, TB7-TB8

which are used for isolation/testing and thru circuit testing. Thus for changing assignment of

I/C and O/G circuit cables, only Jumpering between respective tag blocks need to be changed

an 2Mb (120ohm) DDF module provide flexibility of design.

DDF Frame or Slim Rack
     We are manufacture of DDF RACK SLIM AND BAYFRAM TYPE.

The Bay Frame are used for mounting the above three types of module.

There are two types of Bay Frames of the dimention as stated below.

(a) 2100m x 120mm x 225m

or

(b) 2750m x 120m x 225m

The bay frames are the C channel structure having copper strips on both sides for terminating

exchange earth. Both copper strips are connected together with a multi conductor cable

band.

The modules are mounted on the front of the Bay Frame face for which purpose of M5 mounting

holes are provided on the face of the Bay Frame.

Each module is mounted with 8 sets of M5 screws. These screws are driven thru the module

into Bay Frame face with the help of long nose star screw driver.