Installation guide

2
SCON-3074 Configuration
707112-001
and may reference either ‘FET1’ or ‘FET2’. Looking from the back of the SCON-3074,
FET1 is always the leftmost of the two Ethernet cards.
The IP parameter of course refers to the IP address that is being assigned to the SCON. The
SCON does not make use of DHCP, and must therefore be assigned a real IP address.
The TCP parameter refers to the TCP port to be used for the Telnet connection. Although you
can use the default TCP port for Telnet (not recommended for security reasons), you must
define which port you intend to use (port 23 is not assumed). The port number that you select
for use by the Telnet client can not be the same port used to support any TN3270 clients that
may be configured.
The router parameter is not needed if your client is to be located on the same subnet as the
SCON, and represents the IP address of the default router (or gateway) that is to be used to
provide network access from other subnets. The router address used must be on the same
subnet as the address assigned to the SCON-3074.
You do not need the subnet parameter unless other than default subnet masking is being used.
LINCS assumes the default subnet mask if the parameter is not coded, but will update itself
from information provided by a configured router through an ICMP exchange.
You can omit the mac parameter if the default (burned in hardware) MAC address is being
used (recommended). If the value of the MAC address is changed and put into affect through
an IML, you may have to purge the cache of the default router/switch so that it will ‘forget’
the IP/MAC mapping it may have already cached.
The password parameter is provided for security purposes.
Furthermore, the order of the parameters is not important in the file. The file is not case
sensitive. Parameters that are not used can be omitted. Do not leave any white space in the file
(spaces or blank lines). White space will be interpreted as the end of the file.
If the information is to be entered from floppy, the file should be placed on a floppy and
inserted into the floppy drive, prior to booting the SCON-2XL.
You may use the VT3270 client provided on the CD shipped with the SCON-3074 to connect
to the Telnet interface, or you may use another Telnet client if desired. The VT3270 client
provides a good 3270 terminal emulation, eliminating the need to map most 3270 functions.
If you elect to use a VT100 emulation instead (such as the one that is included in Windows),
some keyboard mapping is used by the SCON-3074 to provide 3270 key functionality. Among
the more commonly used key definitions supported by VT100 and most Telnet terminal
emulations are:
PF1-PF9 = <ESC><1> - <ESC><9>
PF10 = <ESC><0>
PF11 = <ESC> <->
PF12 = <ESC> <=>
Keyboard Reset = <CTRL><R>
Test Mode Toggle = <ESC> <t>
Toggle between status row and 24th row (for most Telnet emulations) = <ESC><?>
You may find a complete listing of Telnet emulations supported by the SCON-3074, in the
LINCS Features manual.