Multi-Tech Systems MT5634ZBAV - Manual (Page 120)

User Guide
110
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 (ATS0=2 if you have
Caller ID service) 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.
4
If you are using a slow transfer protocol, such as Xmodem or Kermit,
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.
4
Try entering the I11 ommand in online mode to display diagnostic
information, making a screen print of the diagnostics listing, and
checking for parameters that might be unacceptable (number of re-
trains, round trip delay, etc.).