Store and Forward Communication
In an operating Radio Telemetry Monitor and Control System, messages must be routed around or over obstacles such as
hills and large structures or sent long distances often as much as 50 miles from the point of origin or
the System Control Computer (SCC).
In the graphic, the System Control Computer (SCC) sends a message to RTU #3. Due to the hills, RTU #3 can not receive
the message.
In Store and Forward communications, the SCC sends the message intended for RTU #3 to RTU #1
telling it to forward the message to RTU #2. RTU #2 receives the message and knowingly forwards it to RTU #3. RTU #3
receives the message, understands the message was intended for it and sends a received reply back using the same communication
path. RTU #3 can be instructed to remember this path for any future messages such as when RTU #3 wants to initiate
a message to the SCC.
Should a critical RTU develop problems in a communication path, the system operator can change the communication path
information at the SCC. In this way, the operator may keep the System polling until the critical RTU is repaired.
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