"PaybyPhone" coming to Brighton

In today's City Council press release announcing this innovation the following paragraph attracted my attention:-

"There is a service charge of 15p for PayByPhone transactions, in line with the practice of most other councils which offer the service alongside pay and display machines. This covers the cost of providing the service and processing the payment."

Who covers the cost of providing the coin machines, maintaining them and collecting the money? Will the PaybyPhone user be charged at a lower hourly parking rate to allow for this?