Marine Communications Limited Tel. +44 (0)1453 873399 Fax. +44 (0)1453 873344 Marine Communications Limited is a specialist company producing a range of fully functional telephone exchanges for the marine market. The systems are designed for both on-board and external communications. MCL have a range of digital telephone exchanges suitable for 8 to 240 extensions. The systems are digitally controlled and transport the speech around the system on multiplexed non-blocking digital streams. This means that there is no limit on the number of simultaneous calls. All systems are fully programmable. All manuals, firmware updates and programming tools are available from the support section of this site. Last Updated: 13 March 2013