DOCSIS 3.1 Assumptions

This calculation estimates the economic implications that an upgrade to DOCSIS 3.1 can incur in an existing network. It is a guide and assumes that coaxial cables can be reused.

The CAPEX (total investment), is based on a rough estimate of the total cost of active and passive hardware in the network and its planning, administration and installation. It is not an offer and DKT A/S is not liable in any way. The numbers are based on inspiration and experience from real-life upgrades, but local circumstances and requirements must be considered prior to making a more accurate estimate.

A further significant reduction in CAPEX is possible if a budget exists for node split/reduction in subscribers per segment. This budget must be deducted from the estimated CAPEX, as this is no longer necessary with the sufficient capacity provided by DOCSIS 3.1!

The OPEX (Operating expenses) is based entirely on maintenance of the passive distribution network, such as taps/splitters. At least 8% of the population of passives must be maintained each year. Experience shows that the maintenance consist of:

  • 75% is from loose connectors due to the cold-flow phenomenon and
  • 5% is due to CPD/corrosion/Passive InterModulation.

This can all be avoided by using the DKT “Signia” distribution passive series. More than €2 can thus be saved per subscriber/year, which neutralizes the extra investment within year 1!

In addition to the calculated OPEX savings, there is a long list of additional savings. These are not included in the calculation, among others:

  • The biggest extra saving is probably the use of customer upgradable outlets (PIO) which will avoid the truck-roll to upgrade to different frequencies. This is an OPEX saving of 1x truck-roll per subscriber + additional increased customer satisfaction. Customer upgrades are swiftly done by simply shipping the hardware to the subscriber for self-installation.
  • Self-adjusting amplifiers avoid misconfiguration and enable higher customer satisfaction and fewer customer care calls.
  • A brand new network reduces the general defect rate.
  • Call center cost reductions can be realized.
  • Reduced churn can be achieved.