Using File Transfer Programs
3-32
Falcon
®
DOS Portable Terminals
Sample
Modem-
Initialization
File
Performance
This section describes issues relating to serial performance on the Falcon.
Although these issues are described in the context of XFER, they apply to serial
transfers in general.
File-transfer speed is severely reduced when byte counts are displayed on the
Falcon screen. Use the
Q
option in XFER to enable quiet mode and speed up
transfers (refer to
Performance also is diminished when data is transferred to the
C
drive or to a
PCMCIA ATA card. Both of these devices write data to the disk very slowly.
Problems may arise as the disks become full and loading algorithms are
executed to clean up space for new data. This can become particularly severe
with Zmodem in streaming protocol, because the sender never waits for the
receiver to write data to the disk. To avoid this problem, use Zmodem with
either windowing (refer to
) or flow control (refer to
INIT_STRING
ATE1Q0V1X4&C1&D2S7=10s9=6s10=20S11=55S0=2
FAIL_STRING
NO CARRIER
FAIL_STRING
ERROR
FAIL_STRING
NO DIALTONE
FAIL_STRING
BUSY
FAIL_STRING
NO ANSWER
# This is a comment.
So is this.
COMPRESSION_STRING
CLASS 5
COMPRESSION_STRING
V.42BIS
PROTOCOL_STRIN
LAPM
PROTOCOL_STRIN
ALT
DIAL_METHOD
T
# (T)ONE or (P)ULSE dialing
CARRIER_TIMEOUT
60
ACCESS_DELAY
2000
LOCKED_BAUDRATE
T
# (T)RUE or (F)ALSE
ECHO
T
# (T)RUE or (F)ALSE
HANDSHAKING
R
# (R)TSCTS, (X)ONXOFF, or (N)ONE
NUMBER0
9 555-1234
NUMBER9
(111) 555-9999
NUMBER5
(111) 555-7777
NUMBER1
9 555-4321
The keywords are all case-sensitive and must be capitalized. For the
FAIL_STRINGS
,
COMPRESSION_STRINGS
, and
PROTOCOL_STRINGS
settings, the value string should also be capitalized. Any
responses from the modem are converted to capital letters before being compared
with the various substrings.
advuser.book Page 32 Friday, September 27, 2002 4:22 PM
