ZyXEL Communications 2864 Series User Manual page 174

The modem supports laser printers compatible with HP Laserjet-II printers or laser
printers supporting the HP PCLII programming command language. This includes
essentially all HP-compatible laser printers on the market.
Different laser printers may have different print speeds. The fax receiving speed de-
pends on the fax connection speed. For current standards, the connection speed is
from 2400 bps up to 14400 bps. For the upcoming V.34 fax standard, the speed may
run up to 28800 bps. The printer speed must be greater than or equal to the fax re-
ceiving speed, otherwise a fax data overrun will occur. If the printer is slow, the mo-
dem may adjust the minimum scan time per line parameter to have the remote site
send the fax slower (with a higher "minimum scan time per line" parameter). When
a laser printer is connected to the modem and both are turned on, the command
AT+FZT
will cause the modem to test the printer speed and store the speed parameter in non-
volatile memory. The printer will have one test page print. The modem also sets the
st (scan time) parameter in the +FCC Class 2.0 command according to the speed
parameter. In the first Class Z mode operation after being turned on, the modem
sets a default st parameter according to the speed parameter stored in the nonvol-
atile memory. The user can override the st setting by using the +FCC command.
Two laser printer resolutions can be selected using +FZR command
+FZR =0
+FZR =1
The default is 300 dpi. 150 dpi is not recommended because of printing quality de-
gradation. If you are using a very slow laser printer, 150 dpi will speed up the fax
receiving process. Use the AT+FZS command to select the paper size:
+FZS =0
=1
=2
Resolution: 300 dpi
Resolution: 150 dpi
LETTER (8.5" x 11")
LEGAL (8.5" x 14")
A4 (210mm x 297mm)
15–20