HP ProSignia 120 Maintenance And Service Manual page 50

Table 2-23 Solving Modem Problems
Problem
Phone line noise causes a
disconnection.
Ten-digit dialing does not
work correctly under Windows
95.
Modem cable
disables/interferes with other
telephony devices (Germany,
Austria, and Switzerland only).
Modem does not dial correctly
under Windows 95
(Switzerland and Germany
only).
2-28 Troubleshooting
Continued
Probable Cause
Hang-Up Delay S Register
(S10) set too low.
Ten-digit dialing doesn't work
correctly under Windows 95,
making it difficult to dial
numbers in a different area
code that are not long
distance calls.
The modem cable does not
provide the additional 4-wire
connection required in
Germany, Austria, and
Switzerland to form the serial
pass-through necessary so
that other devices can work on
the same phone line.
The "Wait for dial tone before
dialing" check box is checked.
This causes Windows 95 to
issue an ATDT; command. A
typical dial string would look
like this:
ATDT;
ATDTnnn-nnnn
In Germany and Switzerland,
the ';' dial modifier is not
permitted to be used in this
fashion by regulatory agencies
since ATDT; takes the modem
off-hook without dialing.
Therefore, the modem returns
an error message when
attempting to dial. The error
message reads:
"The computer is not receiving
a response from the modem.
Check that the modem is
plugged in, and if necessary,
turn the modem off, then turn
it back on."
Recommended Action(s)
Change S10 default to 150.
Click Start Programs
Accessories HyperTerminal.
Go to Command Mode.
Type ATS10=150 and press Enter.
This command causes the modem to take
longer to disconnect even if there is noise
on the line.
Since Windows 95 does not limit the number
of digits you can enter in the Phone Number
field, set the Area Code field to match your
local area code. Then type the ten-digit
telephone number in the Phone Number
field.
To use another telephony device on the
same line in these countries, unplug the
modem cable from the wall jack first.
Click Start Settings Control Panel.
Double-click the Modems icon.
Click the Properties button.
Select the Connection tab.
Click the "Wait for dial tone before dialing"
check box to clear it.
Click OK Close.