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In recent years, important investments have been dedicated to CATV networks in order to, first, make the distribution of multimedia through the cable possible and second, to carry a larger number of TV channels.
These investments have been mainly concentrated on the following areas:

- Installing return paths
- Providing larger bandwith to the network.

With the advent of digital TV, and considering that it is possible to transmit up to 12 digital programs within one analogue channel, the provision of a larger number of TV channels is less important and can be postponed.
In view of the strong demand for internet access, the main thrust of modernization is currently focused on data transmission services.
However with the increased number of cable modems connected to the CATV network, various unexpected problems were encountered. Of particular concern to the operator, is the noise induced into the return path, which is caused by poor shielding of a cable system within a building.
In order to rapidly overcome this problem, It is necessary to filter the signals from subscribers creating these disturbances.
Considering the rapid growth of cable modem usage in the near future, the problem of noise in the return path must be addressed and radical solutions applied where necessary.
Within the HFC concept, the solution requires the upgrading of the coaxial section between fibre node and subscriber.

In this context, EMC has developed  , a cost efficient optic based solution, compatible with your DOCSIS system.

is a flexible structure, open to other data transmission systems and can, since it is a cost efficient solution, be considered as state of the art.

The provides a logical, smooth transition for the CATV network towards full, wideband, multimedia operation while maintaining the functions of the existing network completely free of disturbance during the upgrading phase.