# Interfaces - internal

*   **To the conveyor and storage device PLC's**
    *   **TCP/IP telegrams – WCS saves/reads telegrams in DB, Communication process does the actual sending/receiving.**
    *   Two ports for each device; one for sending telegrams; one for receiving telegrams
    *   Configuration of the telegrams via TelegramConfigurator; creates the source code
*   **To WMS**
    *   **WebAPI;** configurable via HostConfigurator; creates the source code
    *   RestApiServer for receiving messages from WMS
    *   RestApiClient for sending messages to WMS