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The multiplexers should also be sized for future expansion. This is a balance between catering for the future and optimizing payback on capital expenditure. Most networks will require a phased approach to reduce the initial capital expenditure required in order to maximize the ROI, which is a key factor to consider in the business plan. , E1, T1) that have to be transported from A to B. In addition, the number of circuits to be added and dropped at each site along the route should be specified.

One needs to be careful to incorporate spot heights and areas where the path could cross any terrain that is higher than the contour line. 6. An additional profile point is added, which is a worst case of 920m or the height of a spot height if one exists within the 900-m contour. A worst-case figure should always be used. 5 Contour map with path profile. 6 Contour map with even contours and spot height. to the highest and lowest possible values, respectively. For very flat paths it is good practice to write down a terrain value every few kilometers even though the value is constant because when the Earth bulge is calculated by a computer program it will need a base value to reference.

Appropriate frequency bands can then be chosen for the links and applications made to the regulatory authority. Link bands are usually allocated according to the service being provided and the system bandwidth required. Spectrum is very scarce, and therefore the regulator will want to allocate it as sparingly as possible. Most regulators will encourage operators not to implement short hops in the lower frequency bands. Even if this is not regulated, it is in the operators’ long-term interest to implement a maximum link length policy, where the allocated RF bands are specified in terms of the link length.