Appendix: Answers to Frequently Asked Questions
MicroLink 33.6TQV / MicroLink 28.8TQV / MicroLink 14.4TQ
Manual © 1997 ELSA GmbH
97
SIO.SYS and VSIO.SYS programmed by Ray Gwinn will help. They must be entered as devices in the
CONFIG.SYS file instead of the standard OS/2 drivers COM.SYS and VCOM.SYS.
You can download these shareware drivers from the MODEMS forum (file area KONFIG) of the
ELSA
ONLINE
Support BBS. The compressed file contains detailed installation instructions.
Telix
How can I set the bit rate in Telix to 28,800 bps or 14,400 bps for
MicroLink 28.8TQV
or
MicroLink 14.4TQ
, respectively? I only find settings for 9600, 19,200 and 38,400 bps.
The bit rate you set in Telix is the DTE rate, i.e. the speed of your serial interface. This rate cannot be
set to 28,800 bps or 14,400 bps. However, it is possible and recommended to set the DTE rate to a
higher value than the 28,800 bps or 14,400 bps that your
MicroLink 28.8TQV
or
MicroLink 14.4TQ
supports on the telephone side (DCE rate). On the serial interface,
MicroLink 28.8TQV
can transfer
data at up to 115,200 bps,
MicroLink 14.4TQ
up to 57,600 bps. On the telephone side, the modem then
attempts to use the next lowest possible speed (i.e. 28,800 bps or 14,400 bps, respectively). If V.42bis
data compression is enabled, which can compress data down to about 25% of the original size, it is
possible to achieve effective transfer rates up to four times higher than the DCE rate, if the DTE rate is
set to 115,200 bps or 57,600 bps, respectively (4 x 28,800 = 115,200, 4 x 14,400 = 57,600). Therefore,
it is recommended to set the DTE rate to 115,200 bps for
MicroLink 28.8TQV
and 57,600 bps for
MicroLink 14.4TQ
.
I get many CRC errors when transferring files with Telix for DOS. What can be the reason?
A common reason for frequent CRC errors is an improperly set handshake method. The same method
must be enabled in both your modem and Telix. All ELSA modems are preset to RTS/CTS handshake
(
AT\N3
). In Telix for DOS v3.22, XON/XOFF handshake is the default setting. Make the following
changes in the Telix configuration (
<Alt><O>
) under "Terminal options":
J - XON/XOFF Software Flow Control Off
K - CTS/RTS Hardware Handshaking On
When exiting the configuration, select "Write setup to disk" to make the changes become active each
time Telix is started.
RIP
What is the RIP protocol, and what do I need to use it?
RIP is the abbreviation of
R
emote
I
maging
P
rotocol
, a standard that allows the access of online
systems with a graphical, mouse-controlled user interface. The protocol is based on a text-oriented 7-
bit ASCII scripting language and allows the fast transfer of graphics and predefined strings with a
modem. RIP also allows RIP commands to be mixed with conventional ANSI or VT100 commands. The
graphics display resolution of the current RIP version 1.54 is 640 x 350 pixels with 16 colors.
To use RIP, both the called BBS and your communications program must support RIP. The
ELSA
ONLINE
Support BBS (+49-241-9177-981) and e.g. the CyberCity BBS (+49-241-21130) can be called
