The maintenance of underwater cables is a key element for the reliability of the various services offered by telecommunications operators and OTT (Over The Top) players. If the operator and contractor of the EPC are identical or related companies, the agreement should prevent the agreement from relying on delay or under-performance on the part of the other, in order to obtain relief from the owner as part of their contract. The agreement should also prevent a contractor from sticking to the actions of the other to defend the owner`s right to a delay or non-compliance. Note that software providers sometimes make the difference between maintenance and support. Maintenance may be limited to your ability to get upgrades for the product. However, support usually refers to your ability to get support (phone, web-based, etc.) if you have a problem or a question regarding the use of the software. Make sure you understand what your provider means through maintenance and support. In addition, for some vendors, maintenance only covers intermediate versions and patches, while larger upgrades must be paid separately.