Hongdian H3304 4CH Dual SD MDVR - Manual (Page 58)

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DTU Service: Set whether enable the DTU Service.
Work Mode: Work as a Server or a Client. Client will register to server automatically.
Transmit Protocol: Select the protocol used to transmit.
Port: Set the receive port if work mode is server.
Received Packet Max Length: Set the max length of received packet, this value must smaller than 1024.
Data Center Configure: If work mode is client, then set parameters of data center here.
Heartbeat Settings: Enable Heartbeat will make the router send certain data every certain interval, this
function is used to keep the link active, also avoid fake link or offline. This function may cause extra
traffic fees.
Rs232 Setting: Set parameters of Rs232 port, please set these according to your device’s Rs232 port
parameters.