Signage Manager software communicates with media players through local area network (LAN).
Some network ports on the media player must be enabled for software to properly work with the it.
Hypertext Transfer Protocol (HTTP), main communication port with legacy players (e.g. NMP-203w, NMP580-w, EP1031, EP1032, EP1042T, CDM4300R, CDM4900R, CDM5500...).
HTTP alternate, main communication port with all players.
For cloud update service through Google drive.
Microsoft Simple Service Discovery Protocol (SSDP), to discover players on the network.