Appendix I
Remote Access (Tunneling) (continued)
I-3 Tunneling Troubleshooting
Using the original serial cable, please confirm valid communication between the
serial device and its application software on the PC with no iServers in between
(direct serial connection). Otherwise, reset the power, first on the remote iServer
and then on the local iServer and recheck for Connection type drop down menu as
simultaneous.
A quick way to check the LAN and serial tunneling connection is to separately
access each iServer WEB page via the Ethernet. If successful, this should prove a
valid LAN connection.
For serial tunneling, open a HyperTerminal session on the PC pointing to the same
COM port to which the Local iServer is connected and type/send some characters.
This should cause the
Rx Receive
LED on the Local iServer to blink as it receives
the data from the serial port and onto the LAN. Accordingly, the
Tx Transmit
LED
on the Remote iServer should blink as it transmits the data from the LAN into the
serial device. If no LEDs blink, then that could possibly point to the iServer
connection in trouble - particularly, the serial cabling and/or the serial settings (Baud
rate, stop bit, parity, etc.) throughout the communication path between the PC, the
iServer, and the serial device.
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Summary of Contents for C4EIT
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