Serial Port Passthrough Using Telnet - VBrick 9000 Series Getting Started Manual

Serial Port Passthrough Using Telnet

As mentioned in the previous section, either serial port can be accessed over Ethernet via a
Telnet client. A VBrick appliance configured as a Passthrough Responder will accept a
connection request to TCP port 4439 (COM). The request can come from a Telnet client or
other PC application. Any data sent by the PC to TCP port 4439 will be delivered out of the
VBrick serial ports and any data present on the VBrick serial port will be sent to the
connected PC.
If multiple Telnet sessions are active on one VBrick (each VBrick supports up to 64 sessions),
the data from the VBrick will be sent to all connected PC's, and the data received by the
VBrick from the PC's will be delivered on the serial port. If multiple Telnet sessions are
active and each is sending data to the VBrick, the data delivered by the RS-232 port will be a
mix of characters presented in the order they were received (e.g. the data from all the senders
is bridged together). This feature provides a method to broadcast alarm status or other
information to multiple locations.
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