Quick Reference Guide
70
The Modem Cannot Connect When Answering
4
Autoanswer might be disabled. Turn on autoanswer in your data-
comm program or send the command ATS0=1 to your modem in
terminal mode.
File Transfer Is Slower Than It Should Be
4
You might have an older UART. For best throughput, install a
16550AFN UART or a Multi-Tech ISI serial port card. See the
“Quick Start” chapter for information on how to identify your UART.
4
If you are running under Windows 3.1 and have a 16550AFN
UART, you must replace the Windows serial driver, COMM.DRV, to
take full advantage of the UART’s speed. (See “The 16550 UART
and Windows 3.1” in MultiModemZDX Help.)
4
If you are using a slow transfer protocol, such as Xmodem or Ker-
mit, try Zmodem or Ymodem/G instead.
4
Is your line noisy? If there is static on your line, the modem has to
resend many blocks of data to insure accuracy. You must have a
clean line for maximum speed.
4
Are you downloading a compressed file with MNP 5 hardware com-
pression enabled? Since hardware data compression cannot
compress a file already compressed by an archiving program, the
transfer can be marginally slower with data compression enabled
than with it disabled. (See “When to Disable Data Compression” in
MultiModemZDX Help.)
4
Try entering the L8 (List Online Diagnostics) command in online
mode, making a screen print of the diagnostics listing, and check-
ing for parameters that may be unacceptable (number of retrains,
round trip delay, etc.).
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