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MultiMobile User Guide
MT5634ZLX/FE
C: Your software may have turned off the DTR signal.
P: The Modem Does Not Connect with Another Modem
C: There may be a problem with the remote modem if you do not hear the high pitched tone
from the remote modem.
S: Run the Remote Digital Loopback Test (&T4 command).
P: Occasionally, the Modem Gives a Burst of Errors.
C: The telephone line may be noisy or bad.
S: Hang up the call and try to connect again for getting a better telephone line.
C: If there are other telephones on the same line that your modem is using, someone may have
picked up a telephone on that extension.
C: Your telephone line may have the call waiting feature.
S: Try adding *70 to your ATDT dialing command line. If it doesn’t help, ask your telephone
company how to temporarily disable call waiting.
P: The Modem Gets Random Errors in Transmitted Data.
S: Try to use V.42 or MNP1-4 if possible.
S: Connect the modems at a slower baud rate.
P: After Downloading a File, the File Does Not Store on Your Disk Drive
C: If both modems are using MNP or V.42 protocol, then flow control may not be enabled.
S: Configure your software to use RTS/CTS flow control to cause your computer to pause long
enough for the file to be stored to disk.
P: The Text on the Screen Is Not Legible
C: Your software settings may not match the settings of the remote device.
S: Make sure your data bits, stop bits, and parity settings match the settings that the other
computer is using. The two most common settings are: 8 data bits, None parity, and 1 stop
bit (8,N,1) or 7 data bits, Even parity, and 1 stop bit (7,E,1).
C: If the telephone line is very noisy, you may see corrupted data on your screen.
C: Due to poor telephone line conditions, the modem may have fallen back to a slower
communication speed. You may need to change the baud rate setting in your software to
match this slower speed. To return the modem to the higher speed, disconnect the link and
re-establish again.
P: When Using V.42bis or MNP5, Some Features Are Disabled
C: You may be using a non-streaming protocol, like Xmodem or Ymodem to transfer files. Those
are fine unless you are using V.42bis or MNP5
S: When using V.42bis or MNP5, you should use a streaming transfer protocol like Ymodem-G
or Zmodem.
S: Configure your software to use hardware flow control (RTS/CTS ON).
Q: When Connecting to Another Modem, the Modem Reports a Higher Connect Baud Rate than
it Is Really Using
C: The modem defaults to report the modem-to-computer baud rate when it responds with
CONNECT.