Signage Manger communicates with media players through local area network (LAN). Some of network ports on media player must be enabled for software to properly working with player:
| Port | TCP | UDP | Description |
| 80 | TCP | Hypertext Transfer Protocol (HTTP), main communication port with legacy players (e.g. NMP-302-W/580). | |
| 8080 | TCP | HTTP alternate, main communication port with all players. | |
| 443 | TCP | For cloud update service through Google drive. | |
| 1900 | UDP | Microsoft Simple Service Discovery Protocol (SSDP), to discover ViewSonic NMP players and CDM media player on the network. |