An ODF is a space-efficient modular system used for terminating a bunch of optical fibers in a secured and organized manner without eating up the floor space.

The ODF comprises of one frame for patching, another for splicing and also of a wholesome solution where excess patch cords and cables can be housed. The patching frame comes with an integrated cable ladder and so does the splice cabinet for easy cable arrangement. You may find ODFs in three splice frame systems

  1. S system – where the patch cord ladder S and the patch frame are a single unit, and
  2. TS system – where the patch cord ladder TS comes as an external box with the patch frame.
  3. The system solution TS box features Cozlink pre-terminated cable of desired length. Splicing of the cables is performed indoors.

Different Parts Of An ODF Box

ODF is a single modular unit used for managing spliced portions of the cords and for the excess cables storage. A typical optical distribution fiber box can be divided into portions such as:

  • Patching Frame: A 2000mm patching frame may house 14 patch modules giving room for 1344 fibers per frame. Height of the frame can either be 2050mm and 2150mm as per the installation method – TS or S.
  • Splicing Frame: A splice frame is available in three options – 2200mm, 2000mm and 1800mm frame, which can accommodate 10, 9 and 8 splice modules respectively. A provision for the cable ladder is given so that height can be increased further by additional 350mm. This frame is provided with doors on request.
  • Patch Modules: All the connectors are plugged into pullout units where you can house 16 connectors in 8 duplex adapters. The adapters are positioned in such a way that all the patch modules can be plugged in or out independently without disturbing the whole set-up. A protective cover can also be ordered for better security to the patch units’ box.
  • Other Accessories:  The other accessories crucial to the design and functioning of an ODF box are Hangers, cable ladders, splice frame, roll-out ramp etc.

Important Installation Solutions

An optical distribution frame can be installed at various locations of the fiber distribution room depending upon the layout and accessibility factors. However, the corner location or the one with wall on one side should be avoided to make accessibility of the fibers easier and faster.

Installation Solution S

A patch cord ladder S is juxtaposed with the patching frame that accommodates patch cords and cables and the exit points of the cables and cords in the frame. The splice frame is aligned directly with the patching frame and is attached to a cable ladder that allows emerging of the cables from the patching frame. The cable length is fixed at 20m and the other cables entering the splicing frame are installed on the cable ladders.

S Procedure

The splice frame has a wall either on the back or on side or has a similar kind of construction to achieve maximum support. In case the installer chooses to keep the frame free-standing, the floor is fixed as the fastening point. Then, the number of patching frames as planned is added and these are connected to one another by the holes present at the top and side of the frame in case of wall installation. To achieve floor installation, the holes in the frame are provided at the bottom.

Installation Solution TS

To manage the patch cords emerging from the frame, the patch cord ladder TS is supplied along with the patching frame. Cables from the frame, which are corresponding to the patch modules, are placed in the rear of the patch cord ladder at the prescribed exit points in the frame. The splice frame in this solution is placed in another cellar or room in the installation solution TS.

TS Procedure

In TS procedure, the splice frame and patching frame are independent of each other. The cables travelling from the patch modules via cable ladders are made to connect with the splicing frame located in some other location in the distribution room.

Frame Installation Procedure – Pull Out And Twist

To start the installation, the inner frame of ODF is pulled out and twisted. Before the inner frame is pulled out, the bottom of the frame which has an external cover is replaced with a roll-out one and is leveled properly for seamless pulling out. Some frames come with a spring-attached pin which can be raised for easy twisting.

Installation Of Patch Modules

ODF Solutions Image 1

There are two ways of installing the ODF you selected in the frame. The first way is of threading the cable from inner frame front and the second way is that the box can be installed from the back of the frame.

In the first method, lay the cable out on the floor and the free end is threaded to the intended hole in the patching frame. Installation begins from the top or bottom for ensuring the correct positioning.

For the patch cord installation, the entire cable is pulled through the hole and fit into the patch module using a lug and the corresponding notch. The patch cord is screwed into the inside of the frame and then the screws are tightened from the outside. The cable is arranged in a ‘W’ using the hangers and their front is removable so that the disassembling can be facilitated easily.

Setting The Splicing Frame

The top of the splicing frame is used for installing the patch module cables. The splicing of the modules is followed by looping of the ribbons in the splicing module. Markings are important for easier access and retrieval of the fibers. Each cable from the patch module is marked according to the frame position and the frame designation.

ODF Solutions Image 2

Thus, learn installation of ODF so that the fibers can be arranged properly in the ODF rack. Know all about the arrangement of the fibers in the ODF cabinet and make the whole cabling system easily manageable.


ODF box installation requires knowing all about its part and the starting and the end point of the infrastructure. While the ODF offers a modular way of managing the cables, it is necessary to ensure that the cables are not slacked or twisted while installation. You can buy industrial grade quality patch modules, ODF boxes and other cables from Cozlink, the third party industry approved OEM.

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