‘[17] Telecommunications depend on origination of the call, transmission of the call and termination of the call. The origination and the termination of the call will be under the control of the network providers. The transmission of the call (which is the movement of the data) will normally be the subject of agreement between large telecom providers. However, there is a multiplicity of small wholesale carriers of data who specialise in interrupted or less frequented routes. Here the movement of the data would move from the originator through a small wholesaler and perhaps a chain of wholesalers until it reached the terminal network provider. The movement of the data from the originator and from wholesaler to wholesaler and to the termination is controlled by means of switches. Each movement of data creates something called a "Call data record" or "CDR" which indicates the number of units consumed and from which, if a unit price is applied, a charge can be calculated, the charge being for the use of the carrier's owned or leased network. [18] As Mr O'Hara explains in his affidavit at paragraph 26: 'The actual traffic, i.e. the data packets or minutes, must move through a switch every time that the data is moved between parties. At the point of every purchase and every sale the movement and direction of the data is decided by the switch. Calls must be transferred from trader A to trader B and so forth throughout a supply chain via a switch.' [19] The switch will normally be programmed with a hierarchy of specified routes in order to secure that the call is transferred according to what is called a 'least cost routing plan'. Because of the intrinsic unreliability of networks it is normal for the 'least cost routing plan' to contain, as I have indicated, a hierarchy of alternative routes. A genuine carrier would be unlikely to trade without an LCR. A genuine carrier would be unlikely to trade with only one customer and to use only one supplier since this contemplates that there will never be a problem with the route selected.’