User's Manual

Vectron User manual
© Höft & Wessel AG
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Subject to amendment, errors excepted HW8660UserMan.doc 1.0 02.02.2001 Lin
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9.3 Function diagram
9.3.1 Initial logon of MDE
• The radio fixed part (in Base Station) sends program Switcher signal information about established
connection to Mobile Part (=radio module in MDE).
• Switcher determines serial number of MDE.
• By network broadcasting Switcher checks, if there already is a Base Station which has operated this
MDE. It will recieve no response as this is the initial logon.
• Switcher starts a local Gelnet.
• Gelnet starts a Telnet and logs on to host with user name and password.
• The application on host is started.
• Switcher transmits all data from/of the serial interface to local Gelnet and vice versa.
• The communication line between MDE and host can be described as followed:
MDE – Radio MP – Radio FP (Base Station 1) – Switcher (Base Station 1) – Gelnet (Base Station 1)
– Telnet (Base Station 1) - host
9.3.2 Repeated logon of MDE
• The Radio fixed part (in Base Station) sends program Switcher signal information about established
connection to Mobile Part (= Radio module in MDE).
• Switcher determines serial number of MDE.
• By network broadcasting Switcher checks, if there already is a Base Station which has operated this
MDE.
• As the MDE has already communicated with a Base Station the Gelnet of this Base Station sends a
message. This can – but does not have to be – identical with the current Base Station; to explain this
more clearly, it is suggested that the MDE has now a connection with Base Station 2.
• Switcher transmitts all data from/of the serial interface to remote Gelnet and vice versa.
• The communication line between MDE and host can be described as followed:
MDE – Radio MP – Radio FP (Base Station 2) – Switcher (Base Station 2) – Gelnet (Base Station 1)
– Telnet (Base Station 1) – host