If you rent an apartment, sign a contract with the landlord as a tenant. You cannot rent this apartment to someone else. It is comparable to leasing. But if you are the owner, you can rent it to anyone you want. This is an example of an agreement based on an irrefutable right of use. The IRU ”means the exclusive, unlimited and unenforceable right to use the corresponding capacity (including equipment, fibre or capacity) for legal purposes”.  It concerns the bandwidth acquired, for example after the sealing of a submarine cable system at the end of construction, and the maintenance contract (C &MA) between owners. This is a way for owners to capitalize on unused capacity or unused capacity after the system is commissioned. An irrefutable right of use (IRU) is a permanent contractual agreement that cannot be cancelled between the owners of a cable and a customer of that cable system. Cable is usually a fiber optic cable, because fiber optic can transmit more data than any other type of media. The unfeasible right of use (IRU) is a kind of permanent contractual contract of telecommunications leases that cannot be cancelled between the owners of a communication system and a customer of that system. The word ”indefensible” means ”may not be cancelled, cancelled or cancelled”.
The customer acquires the right to use a certain part of the capacity of the system for a certain number of years. IRU contracts are almost always long-term and usually last 20 to 30 years. The communication system can be a wire cable, for example.B. an underwater communication cable, a fiber optic cable or a satellite. An IRU holder may use the corresponding network capacity of the IRU licensor unconditionally and exclusively for the specified period. In short, the purchase of an IRU gives the buyer the right to use a certain capacity on a telecommunications cable system, including the right to lease that capacity to someone else. Small businesses that need a lease line between London and New York, for example, do not buy an IRU – they have capacity from a telecommunications company that can lease a larger amount of capacity to another company (etc.) until at the end of the contract chain is a company with an IRU. or has an entire cable system….