FAQ
INSYS Modem 56k small INT 2.0/USB 1.0
86
June 06
Problem:
Possible cause:
Remedy
It is not possible to establish a
phone connection.
The modem dials with the pulse
dialing method instead of the
required tone dialing method, or
vice versa.
You can determine if your phone
system dials with pulses or tones:
If you hear a rattling on the line
during dialing, you are using pulse
dialing. The dialing types can be
switched with the commands
ATDP
or
ATDT
.
See also Chapter 9 “AT Command
Set”, commands
ATDP,ATDT,
ATP, ATT
.
The modem can send data, but
can
’
t receive data.
The data flow control settings
(RTS/CTS) are wrong.
See Chapters 5.2.4 to 5.2.6
“
Data flow control
”
.
The modem does not cooperate
with a particular communica-
tion program.
The communication program
expects a certain data flow con-
trol type. The modem has not
been set to the required type.
Setting the modem to the re-
quired data flow control type will
solve the problem. Most of the
time, the used communication
program allows the creation of an
initialization string, in which the
necessary settings can be entered.
This string is transmitted to the
modem during the program start.
See also the manual for the used
software and the paragraphs
regarding
“
Data Flow Control
”
in Chapter 5.2.
The modem cannot communi-
cate with another modem, or
only with errors.
The other modem uses a trans-
mission protocol, which the local
modem cannot understand.
Using the data compression type
and error protocol required by the
other modem will solve the prob-
lem.
(See also Chapters 5.3 and 5.4
“
Error Correction
”
and
“
Data
Compression
”
).
