ZyXEL Communications 2864 Series, User Manual, Page: 217 / 267

19–1
Chapter 19
GENERAL HINTS AND TIPS
Activating Saved Settings upon Turning-on
Use the command
ATWn
to save a set of parameters into one of the available pro-
files. Make these settings your current settings by resetting the modem from the
profile using the command
ATZn
. The active profile will be used at the next power-
on. Refer to chapter 7 for further details.
Avoiding Low Throughput and Loss of Data
Some computers serve and poll their serial port so slowly that data is lost. You may
remedy this situation by using a better equipped computer or by using more effi-
cient terminal software. Please refer to the vendor-specific chapters. Chances are
that you will find some tips specifically for your machine.
In some cases, enabling throughput averaging (
ATS42.1=1
) may alleviate the
problem. More information on this feature is found in chapter 10.
Disabling Compression May Yield Faster Transfers
Using MNP5 data compression on files which are already compressed (.ZIP, .LZH,
.SIT, .ZOO, .TAR and others) lowers the transfer rate. To disable MNP5, use
ATS38.5=1
. The V.42bis compression scheme is more intelligent than MNP5
and recognizes already compressed files. It does not try to compress them again and
thus no speed is lost during a data transfer. More information can be found in
chapter 10.
Avoiding Disconnections during a Handshake on a
Leased Line
If data is sent from the DTE to the DCE (computer/terminal to modem) during a
handshake attempt on a leased line connect, the modem will abort the handshake
and no connection is made. Avoid this by sending
ATS35.1=1
to the modem.
Avoiding Disconnections when Making a Data Call
The modems of the 2864 series return a
RINGING
message when the remote mo-
dem does not answer on the first ring. Some software packages confuse the
RING-