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TOTE-A-FAX 542
TOTE-A-FAX 542
Run an analog loopback test to
determine whether the problem is
one of the first seven listed above, or
if it is a faulty modem. To run this
test, issue either of the following AT
commands:
AT&T1
This command will initiate a local
analog loopback test
AT&T8
This command will initiate an analog
loopback and a modem self test.
Whichever test you select, observe
the LEDs on the modem and
monitor the activity on your PC
screen.
If the loopback test is successful
without creating garbage on the
screen, then the modem is working
properly. The problem is most likely
in the configuration you have
chosen, in your PC, or in the
telephone line.
I tried to transfer a compressed data
file (
.ZIP file, .ARC file
, etc.) but
did not get a higher effective data
throughput with this modem. Why?
This modem has the ability to
compress data files before
transmitting the data to the
receiving modem. This enables
effective data throughput rates much
higher than the actual modem
connection data rate. If you have
the modem configured to use the
V.42 bis/MNP Level 5 data
compression protocols (which is
probably the case), then you are
transferring a data file which is
already compressed. The data
compression protocols cannot
compress the data anymore. Thus,
the data throughput is not higher.
To send and receive data files
(either fax or computer files), do I
need to have my PC turned on?
Yes.
