Multiplex Invest AD is a brand that specializes in communication systems, solutions, and services. They offer a wide range of equipment and systems for digital communication networks, including VoIP communications, TDM access, and Ethernet/IP networks. They also provide electrical equipment, communication cabinets, and racks.

Multiplex Invest AD is known for their SHDSL access platforms, such as Watson TDM, Watson Ethernet, and Watson Ethernet Multiservice. They offer systems for management, monitoring, and control, including xDSL system management, communication equipment monitoring, protocol converters, and microcontroller systems. Additionally, Multiplex Invest AD offers Office-in-a-box solutions to meet the communication and information needs of small to medium-sized businesses.

They also specialize in dispatch communication systems for railway transportation and provide equipment for industrial Ethernet networks, as well as CWDM multiplexing solutions for optical networks. They offer services such as equipment and system maintenance, repair, and production, as well as event support and logistical preparations for conferences, trainings, seminars, and more. Contact them at their Sofia address or through their provided phone, fax, and email for more information